How long is the flight from Ottawa to London?

Departing from Ottawa to London will take you 7h 15m. The distance between Ottawa and London is about 5375 km. Both multi-stop and direct flights can be found to your destination and back.

What are the cheapest airlines flying from Ottawa to London round-trip?

Our cheapest airline available from Ottawa to London is Air Transat. Our recent data shows that you can find tickets from as low as C$ 673 on this airline. Additional options worth looking into are Air France and United Airlines, starting at C$ 766 and C$ 875 round-trip. You may be able to fly from Ottawa to London for 32% less than the average price by searching for these airlines.

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 mm per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What are the most popular routes from Ottawa to London?

Most travellers choose Ottawa - London Heathrow, Ottawa - London Gatwick or Ottawa - London City when deciding on the best route from Ottawa to London.

What are the cheapest flights from Ottawa to London?

The cheapest flight price from Ottawa to London is C$ 882. On average you can expect to pay C$ 1,223. The most popular route, (Ottawa - London Heathrow), can usually be booked for C$ 877.

What are the most reliable airlines from Ottawa to London?

Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ottawa to London on time: Air Canada (47%), Aegean Airlines (47%), Austrian Airlines (47%).

What are the most popular airlines that fly from Ottawa to London?

Before booking your flight from Ottawa to London check out the most popular airlines for this route: Air Canada, Lufthansa or Air Transat.

What airport do you fly from for flights from Ottawa to London?

Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to London. You should not have trouble finding flights to London from Ottawa; the airport handles an average of 2 outbound flights to London per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Ottawa airport to London. It is only a 10.6 km journey to Ottawa (YOW) from Ottawa’s city centre.

Can I find deals for flights from Ottawa to London that include hotel bookings?

Yes. In addition to deals on Ottawa to London flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Ottawa to London?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to London.

Can I find deals for business class flights from Ottawa to London?

Yes. Cheapflights offers flight deals from Ottawa to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

C$ 325+ Cheap Flights from Ottawa to London

Cheapflights Tip: The best prices from Ottawa to London are usually found in September or February, booked 74 days in advance, depart on a Tuesday or Friday and return on a Sunday

Cheap flight deals from Ottawa to London

Enter your travel dates to find the best prices.

Cheapest

Best

Direct

Last-minute

One-way

Cheapest flights from Ottawa to London
Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 August 2026.

Tue 8/97:40 p.m. -

Nonstop7h 15m

Fri 25/99:40 a.m. -

Nonstop8h 00m

Deal found 19/8C$ 650

Sun 13/97:40 p.m. -

Nonstop7h 15m

Tue 22/99:40 a.m. -

Nonstop8h 00m

Deal found 19/8C$ 652

Sun 20/97:40 p.m. -

Nonstop7h 15m

Sun 27/99:40 a.m. -

Nonstop8h 00m

Deal found 21/8C$ 654

Tue 8/97:40 p.m. -

Nonstop7h 15m

Tue 22/912:40 p.m. -

1 stop12h 20m

Deal found 19/8C$ 666

Sun 20/97:40 p.m. -

Nonstop7h 15m

Tue 22/912:40 p.m. -

1 stop12h 20m

Deal found 19/8C$ 673

Sun 20/97:30 p.m. -

2 stops16h 10m

Tue 22/912:10 p.m. -

2 stops40h 44m

Deal found 19/8C$ 824

Tue 6/103:10 p.m. -

2 stops17h 50m

Tue 13/108:00 a.m. -

2 stops29h 15m

Deal found 22/8C$ 851

Sat 3/109:00 p.m. -

Nonstop6h 35m

Sat 10/102:10 p.m. -

Nonstop7h 55m

Deal found 19/8C$ 855

Wed 7/105:30 p.m. -

1 stop22h 30m

Wed 14/1012:40 p.m. -

1 stop31h 05m

Deal found 22/8C$ 856

Tue 8/94:00 p.m. -

2 stops17h 00m

Tue 22/98:00 a.m. -

2 stops18h 20m

Deal found 19/8C$ 858

Mon 7/95:30 p.m. -

1 stop22h 30m

Mon 28/99:30 a.m. -

Nonstop7h 55m

Deal found 19/8C$ 862

Sun 13/98:50 a.m. -

1 stop31h 10m

Tue 22/912:40 p.m. -

1 stop24h 45m

Deal found 19/8C$ 864

Best flights from Ottawa to London
Discover carefully curated flight deals from Ottawa to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Sun 13/97:40 p.m. -

Nonstop7h 15m

Sun 20/99:40 a.m. -

Nonstop8h 00m

Deal found 22/8C$ 724

Sun 20/98:55 p.m. -

1 stop30h 00m

Wed 23/99:40 a.m. -

1 stop19h 45m

Deal found 19/8C$ 742

Tue 6/103:10 p.m. -

2 stops17h 50m

Tue 13/108:00 a.m. -

2 stops29h 15m

Deal found 22/8C$ 851

Thu 10/93:10 p.m. -

2 stops14h 30m

Mon 14/98:40 a.m. -

2 stops20h 14m

Deal found 22/8C$ 944

Fri 20/115:10 p.m. -

1 stop17h 35m

Fri 4/1210:00 a.m. -

1 stop10h 00m

Deal found 18/8C$ 979

Tue 20/105:10 p.m. -

1 stop12h 20m

Wed 28/108:55 a.m. -

1 stop11h 05m

Deal found 18/8C$ 980

Tue 27/106:10 p.m. -

2 stops14h 40m

Mon 2/119:15 a.m. -

2 stops15h 30m

Deal found 23/8C$ 1,259

Mon 2/116:10 p.m. -

2 stops16h 35m

Mon 16/114:35 p.m. -

2 stops31h 10m

Deal found 22/8C$ 1,447

Thu 1/104:00 p.m. -

1 stop13h 45m

Mon 12/109:40 a.m. -

1 stop15h 20m

Deal found 21/8C$ 747

Fri 23/1011:15 a.m. -

2 stops25h 50m

Sun 1/115:00 p.m. -

3 stops26h 12m

Deal found 23/8C$ 904

Sat 12/97:00 a.m. -

1 stop22h 45m

Sat 19/912:40 p.m. -

1 stop16h 45m

Deal found 22/8C$ 824

Tue 15/910:40 a.m. -

2 stops15h 35m

Sun 27/96:50 a.m. -

2 stops14h 48m

Deal found 18/8C$ 946

Tue 27/106:10 p.m. -

1 stop17h 35m

Mon 2/114:45 p.m. -

1 stop27h 15m

Deal found 23/8C$ 1,005

Thu 10/96:00 a.m. -

3 stops24h 55m

Sun 13/96:50 a.m. -

2 stops22h 04m

Deal found 21/8C$ 952

Mon 5/1011:15 a.m. -

2 stops28h 35m

Tue 13/106:35 a.m. -

2 stops18h 10m

Deal found 21/8C$ 972

Tue 27/106:10 p.m. -

1 stop12h 20m

Mon 2/115:35 p.m. -

1 stop26h 25m

Deal found 23/8C$ 1,006

Mon 7/95:20 p.m. -

2 stops23h 05m

Mon 28/97:45 a.m. -

1 stop19h 50m

Deal found 19/8C$ 961

Sun 13/911:15 a.m. -

2 stops17h 10m

Tue 22/97:05 a.m. -

2 stops20h 05m

Deal found 19/8C$ 973

Thu 5/115:10 p.m. -

1 stop20h 10m

Sat 21/115:35 p.m. -

1 stop26h 25m

Deal found 22/8C$ 1,006

Mon 7/93:10 p.m. -

2 stops14h 25m

Mon 14/96:05 a.m. -

2 stops12h 53m

Deal found 22/8C$ 977

Wed 11/114:10 p.m. -

2 stops20h 40m

Tue 24/118:35 a.m. -

2 stops15h 10m

Deal found 20/8C$ 1,302

Fri 13/115:10 p.m. -

1 stop15h 35m

Tue 17/117:20 p.m. -

1 stop24h 40m

Deal found 22/8C$ 1,006

Sat 12/97:30 p.m. -

1 stop10h 10m

Wed 30/64:40 p.m. -

1 stop26h 46m

Deal found 18/8C$ 1,013

Mon 2/1112:45 p.m. -

1 stop16h 00m

Mon 16/1111:40 a.m. -

1 stop15h 35m

Deal found 23/8C$ 1,352

Sun 4/105:25 p.m. -

2 stops11h 05m

Sun 11/101:45 p.m. -

2 stops15h 35m

Deal found 20/8C$ 1,352

Wed 11/114:10 p.m. -

2 stops20h 40m

Sun 22/118:40 a.m. -

2 stops16h 05m

Deal found 20/8C$ 1,313

Fri 11/93:10 p.m. -

2 stops13h 15m

Sun 20/96:05 a.m. -

3 stops20h 15m

Deal found 19/8C$ 997

Wed 16/125:10 p.m. -

1 stop10h 50m

Mon 4/110:00 a.m. -

1 stop10h 00m

Deal found 22/8C$ 1,379

Tue 20/105:10 p.m. -

2 stops12h 35m

Wed 28/106:20 a.m. -

1 stop13h 40m

Deal found 18/8C$ 1,021

Sun 8/114:10 p.m. -

2 stops15h 40m

Thu 12/119:15 a.m. -

2 stops15h 30m

Deal found 21/8C$ 1,414

Find flight deals from Ottawa to London

Round-trip from	C$ 650
One-way from	C$ 325
Popular in	December
Cheapest in	September
Average price	C$ 1,063
Good round-trip deal	C$ 686 or less
Good one-way deal	C$ 374 or less

Air Transat
8/9-25/9
Nonstop
15h 15m total
Ottawa to London

Search Deals

Porter Airlines
8/9
1 total stop
21h 05m total
Ottawa to London

Search Deals

Highest demand for flights based on searches. 2% potential increase in price (C$ 34 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 30 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Price to beat on a round-trip flight from Ottawa to London (LON).

Search Deals

Price to beat on a one-way flight from Ottawa to London (LON).

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Sun 13/9

7:40 p.m.-7:55 a.m.

Nonstop7h 15m

London Gatwick

Sun 20/9

9:40 a.m.-12:40 p.m.

Nonstop8h 00m

C$ 724

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Sun 20/9

8:55 p.m.-7:55 a.m.

1 stop30h 00m

London Gatwick

Wed 23/9

9:40 a.m.-12:25 a.m.

1 stop19h 45m

C$ 742

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Thu 1/10

4:00 p.m.-10:45 a.m.

1 stop13h 45m

London Gatwick

Mon 12/10

9:40 a.m.-8:00 p.m.

1 stop15h 20m

C$ 747

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Sat 12/9

7:00 a.m.-10:45 a.m.

1 stop22h 45m

London Gatwick

Sat 19/9

12:40 p.m.-12:25 a.m.

1 stop16h 45m

C$ 824

OttawaLondon

YOW Ottawa - LTN London Luton

YOWLTN

Ottawa

Tue 6/10

3:10 p.m.-2:00 p.m.

2 stops17h 50m

London Luton

Tue 13/10

8:00 a.m.-8:15 a.m.

2 stops29h 15m

C$ 851

OttawaLondon

YOW Ottawa - LTN London Luton

YOWLTN

Ottawa

Fri 23/10

11:15 a.m.-6:05 p.m.

2 stops25h 50m

London Luton

Sun 1/11

5:00 p.m.-2:12 p.m.

3 stops26h 12m

C$ 904

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Thu 10/9

3:10 p.m.-10:40 a.m.

2 stops14h 30m

London Heathrow

Mon 14/9

8:40 a.m.-11:54 p.m.

2 stops20h 14m

C$ 944

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Tue 15/9

10:40 a.m.-7:15 a.m.

2 stops15h 35m

London Heathrow

Sun 27/9

6:50 a.m.-4:38 p.m.

2 stops14h 48m

C$ 946

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Thu 10/9

6:00 a.m.-11:55 a.m.

3 stops24h 55m

London Heathrow

Sun 13/9

6:50 a.m.-11:54 p.m.

2 stops22h 04m

C$ 952

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Mon 7/9

5:20 p.m.-9:25 p.m.

2 stops23h 05m

London Heathrow

Mon 28/9

7:45 a.m.-10:35 p.m.

1 stop19h 50m

C$ 961

Flights are sorted by cheapest round-trip flights first.

Deals found on 20/8

Showing 1-10 of 60 resultsSorted by cheapest first

...

Best time to book a flight from Ottawa to London

Have a flexible travel schedule? Discover the best time to fly to London from Ottawa with our price prediction graph.

YOW-LON

YOW-LGW

YOW-STN

YOW-LTN

YOW-LHR

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to London

YOW-LON

YOW-LGW

YOW-STN

YOW-LTN

YOW-LHR

What is the cheapest month to book a flight from Ottawa to London?

Currently, September is the cheapest month in which you can book a flight from Ottawa to London (average of C$ 908). Flying from Ottawa to London in December is currently the most expensive (average of C$ 1,298). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YOW to LON?

When flying from Ottawa to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Ottawa to London?

Airfare is below average for this route at the moment.

Ottawa to London flights typically cost between C$ 825 and C$ 1,115 in September.
The cheapest round-trip price found within the last 5 days was C$ 650 on Air Transat (8 Sep-25 Sep).

What’s the top layover airport for flights from Ottawa to London?

Toronto (YYZ) – chosen by Cheapflights users on 41% of one-stop itineraries from Ottawa to London on Cheapflights.

What’s the cheapest layover airport for flights from Ottawa to London?

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 897.

What’s the fastest layover option from Ottawa to London?

Flights via Halifax (YHZ) have the shortest average one-way travel time for 1-stop routes: 9h 00m.

Which airport typically offers the quickest layover for flights from Ottawa to London?

Flights via Paris (CDG) offer the fastest connection on this route, with an average layover time of 1h 36m.

How often are flights from Ottawa to London delayed?

About 25% of weekly flights between Ottawa and London have experienced delays in the past year, with the average delay time being 128 minutes.

What is the most punctual flight time for Ottawa to London flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ottawa to London flights?

Over the past year, Air Transat has had the lowest number of delays on this route, with just 20% of flights being delayed.

How far ahead should I book a flight from Ottawa to London?

Booking 44 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing London

Check out reviews from past customers who have flown with Porter Airlines,Air Transat, andAir France from Ottawa to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Porter Airlines

8.0

Very good

458 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.

Porter Airlines

8.0

Very good

458 reviews

Porter Airlines

8.0

Very good

458 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.

Air Transat

7.8

Good

574 reviews

Porter Airlines

8.0

Very good

458 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.

Air France

7.5

Good

1,647 reviews

Porter Airlines

8.0

Very good

458 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.

Air Canada

7.1

Good

11,525 reviews

Porter Airlines

8.0

Very good

458 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.

Lufthansa

6.8

Okay

8,214 reviews

Porter Airlines

8.0

Very good

458 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Regan,Aug 2026

YYZ - YVR

My first flight with an all female flight crew who were the best ever.

Related info for your journey

What airport do you fly from for flights from Ottawa to London?
Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to London. You should not have trouble finding flights to London from Ottawa; the airport handles an average of 2 outbound flights to London per day. You should also have plenty of airline options to choose from since 5 airlines have flights from the Ottawa airport to London. It is only a 10.6 km journey to Ottawa (YOW) from Ottawa’s city centre.
How long is the flight from Ottawa to London?
Departing from Ottawa to London will take you 7h 15m. The distance between Ottawa and London is about 5375 km. Both multi-stop and direct flights can be found to your destination and back.
What are the cheapest airlines flying from Ottawa to London round-trip?
Our cheapest airline available from Ottawa to London is Air Transat. Our recent data shows that you can find tickets from as low as C$ 673 on this airline. Additional options worth looking into are Air France and United Airlines, starting at C$ 766 and C$ 875 round-trip. You may be able to fly from Ottawa to London for 32% less than the average price by searching for these airlines.
What are the most popular routes from Ottawa to London?
Most travellers choose Ottawa - London Heathrow, Ottawa - London Gatwick or Ottawa - London City when deciding on the best route from Ottawa to London.
What are the most reliable airlines from Ottawa to London?
Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Ottawa to London on time: Air Canada (47%), Aegean Airlines (47%), Austrian Airlines (47%).
What are the cheapest flights from Ottawa to London?
The cheapest flight price from Ottawa to London is C$ 882. On average you can expect to pay C$ 1,223. The most popular route, (Ottawa - London Heathrow), can usually be booked for C$ 877.
Can I find deals for flights from Ottawa to London that include hotel bookings?
Yes. In addition to deals on Ottawa to London flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ottawa to London?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to London.
Can I find deals for business class flights from Ottawa to London?
Yes. Cheapflights offers flight deals from Ottawa to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Ottawa to London?
Currently, September is the cheapest month in which you can book a flight from Ottawa to London (average of C$ 908). Flying from Ottawa to London in December is currently the most expensive (average of C$ 1,298). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Gatwick

Romford

Twickenham

Ilford

Bromley

Sutton

Luton

Slough

Marlow

Cobham

Hounslow

Watford

High Wycombe

Browse thousands of different options on Cheapflights for your next trip

Airlines

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Top destinations

Fly from Ottawa to London on these airlines

Air Canada flights from Ottawa to London

Air Transat flights from Ottawa to London

Lufthansa flights from Ottawa to London

Top 5 airlines flying from Ottawa to London

Airline	Cheapest	Average	Flexibility	On-time
Air Transat	CheapestC$ 673	AverageC$ 799	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Air France	CheapestC$ 766	AverageC$ 1,276	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Air Canada	CheapestC$ 879	AverageC$ 1,088	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Lufthansa	CheapestC$ 906	AverageC$ 1,129	FlexibilityNo cancel fee	On-time76%	Search Lufthansa flights
United Airlines	CheapestC$ 1,186	AverageC$ 1,338	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights

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How does Cheapflights help users find flights from Ottawa to London?

Cheapflights helps you search for flights from Ottawa to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to London?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ottawa to London for you. Better yet — we are completely free to use.

Can Cheapflights find flights from Ottawa to London with no change fees?

Need flexible booking options for your flight to London from Ottawa? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Ottawa to London become cheaper?

Yes! Start tracking prices for Ottawa to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from Ottawa to London from C$ 325

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Ottawa to London

Cheapest flights from Ottawa to LondonExplore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 August 2026.

Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 August 2026.

Best flights from Ottawa to LondonDiscover carefully curated flight deals from Ottawa to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Discover carefully curated flight deals from Ottawa to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Direct flights from Ottawa to LondonExplore direct flight options from Ottawa to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 23 August 2026.

Explore direct flight options from Ottawa to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 23 August 2026.

Last-minute flights from Ottawa to LondonDiscover last-minute flight deals from Ottawa to London. Data last updated 23 August 2026 and is based on user searches.

Discover last-minute flight deals from Ottawa to London. Data last updated 23 August 2026 and is based on user searches.

One-way flights from Ottawa to LondonSearch for one-way flight options from Ottawa to London. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.

Search for one-way flight options from Ottawa to London. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.

Find flight deals from Ottawa to London

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ottawa to London that are best for you.

Best time to book a flight from Ottawa to London

Have a flexible travel schedule? Discover the best time to fly to London from Ottawa with our price prediction graph.

Cheapflights Insights

What is the cheapest month to book a flight from Ottawa to London?

What is the cheapest time of day to fly from YOW to LON?

Find hourly flight availability from Ottawa to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 August 2026.

When flying from Ottawa to London, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from Ottawa to London?

Airfare is below average for this route at the moment.

Ottawa to London flights typically cost between C$ 825 and C$ 1,115 in September.The cheapest round-trip price found within the last 5 days was C$ 650 on Air Transat (8 Sep-25 Sep).

What’s the top layover airport for flights from Ottawa to London?

Share of one-stop round-trip flights from Ottawa to London chosen by Cheapflights users in the past 12 months, using the same layover each way.

Toronto (YYZ) – chosen by Cheapflights users on 41% of one-stop itineraries from Ottawa to London on Cheapflights.

What’s the cheapest layover airport for flights from Ottawa to London?

Average round-trip fare for 1-stop flights from Ottawa to London, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Toronto (YYZ) is the most affordable 1-stop option, with an average round-trip price of C$ 897.

What’s the fastest layover option from Ottawa to London?

Shortest average travel time for 1-stop one-way flights from Ottawa to London, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Halifax (YHZ) have the shortest average one-way travel time for 1-stop routes: 9h 00m.

Which airport typically offers the quickest layover for flights from Ottawa to London?

Average layover duration for 1-stop one-way flights from Ottawa to London, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Paris (CDG) offer the fastest connection on this route, with an average layover time of 1h 36m.

How often are flights from Ottawa to London delayed?

About 25% of weekly flights between Ottawa and London have experienced delays in the past year, with the average delay time being 128 minutes.

What is the most punctual flight time for Ottawa to London flights?

Historically, flights departing in the evening are less likely to be delayed, whereas flights leaving at night tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ottawa to London flights?

Over the past year, Air Transat has had the lowest number of delays on this route, with just 20% of flights being delayed.

How far ahead should I book a flight from Ottawa to London?

Booking 44 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to London. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing London

Check out reviews from past customers who have flown with Porter Airlines,Air Transat, andAir France from Ottawa to London to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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What are the cheapest airlines flying from Ottawa to London round-trip?

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What are the most reliable airlines from Ottawa to London?

What are the cheapest flights from Ottawa to London?

Can I find deals for flights from Ottawa to London that include hotel bookings?

How can I find direct flights from Ottawa to London?

Can I find deals for business class flights from Ottawa to London?

What is the cheapest month to book a flight from Ottawa to London?

Travelling to a place near London?

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Fly from Ottawa to London on these airlines

Choose from the following airlines for your flight from Ottawa to London. Flights are based on user searches made on Cheapflights and were last updated on 23 August 2026.

Alternative routes for Ottawa to London

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Complete your trip

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Direct flights to England

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Cheapest flights from Ottawa to London
Explore the most affordable flight options available from Ottawa to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 August 2026.

Best flights from Ottawa to London
Discover carefully curated flight deals from Ottawa to London that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated 23 August 2026.

Direct flights from Ottawa to London
Explore direct flight options from Ottawa to London based on user searches, and compare prices and availability for your desired travel dates. Data last updated 23 August 2026.

Last-minute flights from Ottawa to London
Discover last-minute flight deals from Ottawa to London. Data last updated 23 August 2026 and is based on user searches.

One-way flights from Ottawa to London
Search for one-way flight options from Ottawa to London. Find affordable one-way fares based on user searches. Data last updated 23 August 2026.

Ottawa to London flights typically cost between C$ 825 and C$ 1,115 in September.
The cheapest round-trip price found within the last 5 days was C$ 650 on Air Transat (8 Sep-25 Sep).