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$ 678 on this airline. Additional options worth looking into are Air France and United Airlines, starting at C$ 771 and C$ 881 round-trip. You may be able to fly from Ottawa to London for 33% 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$ 817. On average you can expect to pay C$ 1,223. The most popular route, (Ottawa - London Heathrow), can usually be booked for C$ 864.

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 1 outbound flight 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$ 337+ Cheap Flights from Ottawa to London

Cheapflights Tip: The best prices from Ottawa to London are usually found in February or September, 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 18 August 2026.

Sun 27/92:15 p.m. -

1 stop14h 35m

Sun 4/1011:35 a.m. -

1 stop11h 00m

Deal found 13/8C$ 650

Sun 13/97:40 p.m. -

Nonstop7h 15m

Fri 25/99:40 a.m. -

Nonstop8h 00m

Deal found 14/8C$ 653

Sun 20/97:40 p.m. -

Nonstop7h 15m

Sun 27/99:40 a.m. -

Nonstop8h 00m

Deal found 14/8C$ 656

Sun 13/97:40 p.m. -

Nonstop7h 15m

Tue 22/99:40 a.m. -

Nonstop8h 00m

Deal found 13/8C$ 663

Tue 15/92:15 p.m. -

1 stop14h 35m

Fri 2/109:40 a.m. -

Nonstop8h 00m

Deal found 17/8C$ 672

Fri 2/108:55 p.m. -

1 stop30h 00m

Fri 9/109:40 a.m. -

Nonstop8h 00m

Deal found 17/8C$ 675

Tue 8/97:40 p.m. -

Nonstop7h 15m

Fri 18/99:40 a.m. -

Nonstop8h 00m

Deal found 14/8C$ 677

Mon 5/104:00 p.m. -

2 stops34h 55m

Thu 8/106:30 a.m. -

2 stops23h 15m

Deal found 14/8C$ 782

Sun 20/97:30 p.m. -

2 stops16h 10m

Tue 22/912:10 p.m. -

2 stops40h 44m

Deal found 18/8C$ 832

Thu 1/106:55 p.m. -

Nonstop6h 35m

Thu 8/1012:40 p.m. -

2 stops14h 30m

Deal found 17/8C$ 858

Mon 12/102:00 p.m. -

2 stops15h 00m

Fri 16/106:00 a.m. -

2 stops40h 10m

Deal found 13/8C$ 860

Sat 24/107:00 a.m. -

2 stops25h 45m

Sat 31/108:25 p.m. -

2 stops33h 25m

Deal found 13/8C$ 862

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 18 August 2026.

Tue 15/97:40 p.m. -

Nonstop7h 15m

Sun 27/99:40 a.m. -

Nonstop8h 00m

Deal found 17/8C$ 685

Sun 20/94:00 p.m. -

1 stop13h 45m

Tue 22/912:40 p.m. -

1 stop31h 15m

Deal found 17/8C$ 771

Sat 5/1212:30 p.m. -

3 stops27h 20m

Thu 10/127:45 a.m. -

3 stops19h 07m

Deal found 17/8C$ 886

Fri 9/102:35 p.m. -

1 stop10h 55m

Fri 16/109:30 a.m. -

1 stop9h 24m

Deal found 15/8C$ 904

Mon 28/96:01 p.m. -

1 stop10h 19m

Mon 5/108:40 a.m. -

2 stops20h 14m

Deal found 14/8C$ 940

Fri 6/115:10 p.m. -

1 stop10h 50m

Sun 6/1210:00 a.m. -

1 stop10h 00m

Deal found 14/8C$ 982

Mon 1/25:10 p.m. -

1 stop10h 50m

Mon 8/210:00 a.m. -

1 stop10h 00m

Deal found 17/8C$ 994

Wed 11/114:10 p.m. -

2 stops15h 40m

Tue 17/119:15 a.m. -

2 stops14h 30m

Deal found 16/8C$ 1,338

Wed 11/119:00 a.m. -

2 stops25h 35m

Tue 17/116:05 a.m. -

2 stops32h 42m

Deal found 16/8C$ 901

Sun 13/97:40 p.m. -

Nonstop7h 15m

Thu 17/912:40 p.m. -

1 stop12h 20m

Deal found 16/8C$ 916

Wed 9/96:00 a.m. -

3 stops24h 55m

Fri 23/108:40 a.m. -

2 stops20h 14m

Deal found 14/8C$ 940

Fri 9/106:25 p.m. -

2 stops25h 05m

Fri 16/106:20 a.m. -

2 stops23h 00m

Deal found 15/8C$ 901

Thu 5/115:10 p.m. -

1 stop10h 50m

Thu 12/114:45 p.m. -

1 stop27h 15m

Deal found 16/8C$ 1,001

Mon 14/910:40 a.m. -

2 stops15h 35m

Mon 21/98:40 a.m. -

2 stops20h 14m

Deal found 17/8C$ 944

Fri 11/92:45 p.m. -

1 stop10h 45m

Fri 18/92:05 p.m. -

1 stop13h 05m

Deal found 15/8C$ 1,050

Fri 6/115:10 p.m. -

2 stops12h 15m

Sun 6/126:30 a.m. -

2 stops13h 30m

Deal found 15/8C$ 1,070

Tue 10/119:10 a.m. -

2 stops30h 20m

Sun 15/116:20 a.m. -

2 stops14h 37m

Deal found 13/8C$ 929

Sun 6/96:00 a.m. -

3 stops19h 45m

Sat 12/96:50 a.m. -

2 stops17h 05m

Deal found 16/8C$ 955

Wed 7/106:55 a.m. -

2 stops35h 00m

Thu 15/109:40 p.m. -

2 stops31h 40m

Deal found 16/8C$ 941

Fri 2/105:20 p.m. -

1 stop13h 35m

Fri 9/104:00 p.m. -

1 stop22h 11m

Deal found 18/8C$ 969

Mon 21/93:10 p.m. -

2 stops18h 10m

Mon 28/96:05 p.m. -

3 stops24h 53m

Deal found 17/8C$ 962

Mon 31/85:10 p.m. -

2 stops11h 20m

Sun 31/11:45 p.m. -

2 stops15h 57m

Deal found 13/8C$ 1,310

Wed 14/106:05 a.m. -

1 stop10h 20m

Wed 28/1010:25 a.m. -

2 stops15h 25m

Deal found 13/8C$ 1,020

Sun 11/102:00 p.m. -

2 stops13h 40m

Fri 23/109:15 a.m. -

2 stops14h 55m

Deal found 18/8C$ 1,568

Mon 7/93:10 p.m. -

2 stops14h 25m

Sun 13/96:05 a.m. -

2 stops32h 19m

Deal found 14/8C$ 998

Wed 11/116:15 a.m. -

2 stops21h 10m

Tue 17/113:10 p.m. -

2 stops28h 19m

Deal found 16/8C$ 1,059

Sun 13/96:10 p.m. -

2 stops14h 05m

Sun 20/96:05 a.m. -

2 stops32h 19m

Deal found 16/8C$ 1,020

Sat 17/104:00 p.m. -

2 stops16h 45m

Fri 23/109:15 a.m. -

2 stops14h 55m

Deal found 13/8C$ 1,791

Mon 14/96:55 a.m. -

2 stops29h 15m

Mon 21/96:05 p.m. -

3 stops35h 15m

Deal found 17/8C$ 1,022

Mon 12/105:10 p.m. -

2 stops12h 35m

Tue 20/108:55 a.m. -

1 stop11h 05m

Deal found 16/8C$ 1,023

Find flight deals from Ottawa to London

Round-trip from	C$ 650
One-way from	C$ 337
Popular in	December
Cheapest in	February
Average price	C$ 1,076
Good round-trip deal	C$ 717 or less
Good one-way deal	C$ 377 or less

Air Transat
27/9-4/10
2 total stops
25h 35m total
Ottawa to London

Search Deals

Air Transat
18/9
Nonstop
7h 15m total
Ottawa to London

Search Deals

Highest demand for flights based on searches. 1% potential increase in price (C$ 23 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease (C$ 28 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

Tue 15/9

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

Nonstop7h 15m

London Gatwick

Sun 27/9

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

Nonstop8h 00m

C$ 685

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Sun 20/9

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

1 stop13h 45m

London Gatwick

Tue 22/9

12:40 p.m.-2:55 p.m.

1 stop31h 15m

C$ 771

OttawaLondon

YOW Ottawa - LTN London Luton

YOWLTN

Ottawa

Sat 5/12

12:30 p.m.-8:50 p.m.

3 stops27h 20m

London Luton

Thu 10/12

7:45 a.m.-9:52 p.m.

3 stops19h 07m

C$ 886

OttawaLondon

YOW Ottawa - STN London Stansted

YOWSTN

Ottawa

Wed 11/11

9:00 a.m.-3:35 p.m.

2 stops25h 35m

London Stansted

Tue 17/11

6:05 a.m.-9:47 a.m.

2 stops32h 42m

C$ 901

OttawaLondon

YOW Ottawa - LTN London Luton

YOWLTN

Ottawa

Fri 9/10

6:25 p.m.-12:30 a.m.

2 stops25h 05m

London Luton

Fri 16/10

6:20 a.m.-12:20 a.m.

2 stops23h 00m

C$ 901

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Fri 9/10

2:35 p.m.-6:30 a.m.

1 stop10h 55m

London Heathrow

Fri 16/10

9:30 a.m.-1:54 p.m.

1 stop9h 24m

C$ 904

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Sun 13/9

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

Nonstop7h 15m

London Gatwick

Thu 17/9

12:40 p.m.-8:00 p.m.

1 stop12h 20m

C$ 916

OttawaLondon

YOW Ottawa - STN London Stansted

YOWSTN

Ottawa

Tue 10/11

9:10 a.m.-8:30 p.m.

2 stops30h 20m

London Stansted

Sun 15/11

6:20 a.m.-3:57 p.m.

2 stops14h 37m

C$ 929

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Mon 28/9

6:01 p.m.-9:20 a.m.

1 stop10h 19m

London Heathrow

Mon 5/10

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

2 stops20h 14m

C$ 940

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Wed 9/9

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

3 stops24h 55m

London Heathrow

Fri 23/10

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

2 stops20h 14m

C$ 940

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/8

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-LTN

YOW-LHR

YOW-LCY

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-LTN

YOW-LHR

YOW-LCY

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

Currently, February is the cheapest month in which you can book a flight from Ottawa to London (average of C$ 914). 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$ 973 and C$ 1,210 in September.
The cheapest round-trip price found within the last 5 days was C$ 650 on Air Transat (27 Sep-4 Oct).

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$ 927.

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 38m.

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

457 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

457 reviews

Porter Airlines

8.0

Very good

457 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

573 reviews

Porter Airlines

8.0

Very good

457 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

457 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

11,498 reviews

Porter Airlines

8.0

Very good

457 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

8,199 reviews

Porter Airlines

8.0

Very good

457 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 1 outbound flight 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$ 678 on this airline. Additional options worth looking into are Air France and United Airlines, starting at C$ 771 and C$ 881 round-trip. You may be able to fly from Ottawa to London for 33% 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$ 817. On average you can expect to pay C$ 1,223. The most popular route, (Ottawa - London Heathrow), can usually be booked for C$ 864.
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, February is the cheapest month in which you can book a flight from Ottawa to London (average of C$ 914). 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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Complete your trip

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Other flights from Ottawa

Popular flights

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$ 678	AverageC$ 809	FlexibilityNo cancel fee	On-time50%	Search Air Transat flights
Air France	CheapestC$ 771	AverageC$ 1,286	FlexibilityNo cancel fee	On-time77%	Search Air France flights
United Airlines	CheapestC$ 881	AverageC$ 1,228	FlexibilityNo cancel fee	On-time69%	Search United Airlines flights
Air Canada	CheapestC$ 886	AverageC$ 1,099	FlexibilityNo cancel fee	On-time67%	Search Air Canada flights
Lufthansa	CheapestC$ 912	AverageC$ 1,161	FlexibilityNo cancel fee	On-time76%	Search Lufthansa 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$ 337

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 18/9. 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 18 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 18 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 18 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 18 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 18 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 18 August 2026.

Last-minute flights from Ottawa to LondonDiscover last-minute flight deals from Ottawa to London. Data last updated 18 August 2026 and is based on user searches.

Discover last-minute flight deals from Ottawa to London. Data last updated 18 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 18 August 2026.

Search for one-way flight options from Ottawa to London. Find affordable one-way fares based on user searches. Data last updated 18 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 18 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$ 973 and C$ 1,210 in September.The cheapest round-trip price found within the last 5 days was C$ 650 on Air Transat (27 Sep-4 Oct).

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$ 927.

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 38m.

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

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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 18 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 18 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 18 August 2026.

Last-minute flights from Ottawa to London
Discover last-minute flight deals from Ottawa to London. Data last updated 18 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 18 August 2026.

Ottawa to London flights typically cost between C$ 973 and C$ 1,210 in September.
The cheapest round-trip price found within the last 5 days was C$ 650 on Air Transat (27 Sep-4 Oct).