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Cheap flights from Ottawa to London from C$ 366

YOW — LON
27 Oct — 3 Nov1
1 adult
1 adult, Economy, 0 bags
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 flights from Ottawa to London

Fri 2/108:55 p.m. -
1 stop30h 00m
Fri 16/109:40 a.m. -
Nonstop8h 00m
Deal found 22/9C$ 723
Tue 13/1010:00 a.m. -
1 stop19h 45m
Fri 23/109:40 a.m. -
Nonstop8h 00m
Deal found 22/9C$ 747
Sun 27/92:15 p.m. -
1 stop14h 35m
Sun 4/109:40 a.m. -
Nonstop8h 00m
Deal found 22/9C$ 754
Sat 10/107:00 a.m. -
1 stop19h 55m
Fri 23/109:40 a.m. -
Nonstop8h 00m
Deal found 22/9C$ 776
Wed 14/104:00 p.m. -
1 stop13h 45m
Fri 23/109:40 a.m. -
Nonstop8h 00m
Deal found 22/9C$ 799
Fri 16/107:40 p.m. -
Nonstop7h 15m
Fri 23/109:40 a.m. -
Nonstop8h 00m
Deal found 22/9C$ 820
Thu 5/1112:30 p.m. -
3 stops24h 05m
Thu 12/116:00 a.m. -
3 stops20h 52m
Deal found 23/9C$ 829
Fri 16/107:40 p.m. -
Nonstop7h 15m
Tue 20/1012:40 p.m. -
1 stop31h 15m
Deal found 22/9C$ 830
Mon 12/104:00 p.m. -
1 stop13h 45m
Fri 23/109:40 a.m. -
Nonstop8h 00m
Deal found 22/9C$ 831
Sun 11/107:40 p.m. -
Nonstop7h 15m
Fri 23/109:40 a.m. -
Nonstop8h 00m
Deal found 22/9C$ 833
Mon 12/104:00 p.m. -
1 stop13h 45m
Tue 20/1012:40 p.m. -
1 stop31h 15m
Deal found 22/9C$ 841
Tue 10/1112:30 p.m. -
3 stops24h 05m
Fri 13/113:35 p.m. -
3 stops33h 10m
Deal found 23/9C$ 841

Find flight deals from Ottawa to London

Round-trip from

C$ 747

One-way from

C$ 366

Popular in

December

Cheapest in

September

Average price

C$ 785

Good round-trip deal

C$ 761 or less

Good one-way deal

C$ 381 or less
Air Transat
  • Air Transat
  • 13/10-23/10
  • 1 total stop
  • 27h 45m total
  • Ottawa to London
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Porter Airlines
  • Porter Airlines
  • 16/10-31/12
  • Nonstop
  • 7h 15m total
  • Ottawa to London
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Highest demand for flights based on searches. 2% potential increase in price (C$ 40 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 32 potential savings vs. average RT price).
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Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Ottawa to London (LON).
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Price to beat on a one-way flight from Ottawa to London (LON).
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Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Fri 23/10

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

Nonstop7h 15m

London Gatwick

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 370

OttawaLondon

YOW Ottawa - LGW London Gatwick

YOWLGW

Ottawa

Wed 21/10

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

1 stop22h 45m

London Gatwick

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 383

OttawaLondon

YOW Ottawa - LHR London Heathrow

YOWLHR

Ottawa

Mon 9/11

6:10 a.m.-12:50 p.m.

1 stop25h 40m

London Heathrow

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 390

OttawaLondon

YOW Ottawa - STN London Stansted

YOWSTN

Ottawa

Sun 18/10

6:25 p.m.-11:25 p.m.

2 stops24h 00m

London Stansted

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 394

OttawaLondon

YOW Ottawa - STN London Stansted

YOWSTN

Ottawa

Thu 22/10

8:15 p.m.-9:55 a.m.

2 stops56h 40m

London Stansted

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 399

OttawaLondon

YOW Ottawa - STN London Stansted

YOWSTN

Ottawa

Wed 21/10

7:20 a.m.-7:55 a.m.

2 stops43h 35m

London Stansted

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 399

OttawaLondon

YOW Ottawa - LTN London Luton

YOWLTN

Ottawa

Wed 21/10

10:00 a.m.-4:35 p.m.

3 stops25h 35m

London Luton

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 428

OttawaLondon

YOW Ottawa - LTN London Luton

YOWLTN

Ottawa

Sun 4/10

8:55 p.m.-12:45 p.m.

2 stops34h 50m

London Luton

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 428

OttawaLondon

YOW Ottawa - LTN London Luton

YOWLTN

Ottawa

Sat 3/10

8:55 p.m.-11:25 a.m.

2 stops33h 30m

London Luton

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 430

OttawaLondon

YOW Ottawa - STN London Stansted

YOWSTN

Ottawa

Sat 3/10

8:55 p.m.-7:50 a.m.

2 stops29h 55m

London Stansted

Wed 31/12

12:00 a.m.-6:00 p.m.

Nonstop0h 00m

C$ 433

Flights are sorted by cheapest round-trip flights first.

Deals found on 22/9

Showing 1-10 of 60 resultsSorted by cheapest first
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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.
Estimated round-trip price

Cheapflights Insights

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

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$ 850). Flying from Ottawa to London in December is currently the most expensive (average of C$ 1,347). 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$ 887 and C$ 1,171 in October.
The cheapest round-trip price found within the last 5 days was C$ 747 on Air Transat (13 Oct-23 Oct).

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

Montreal (YUL) – chosen by Cheapflights users on 35% 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$ 851.

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 Halifax (YHZ) offer the fastest connection on this route, with an average layover time of 1h 20m.

How often are flights from Ottawa to London delayed?

About 28% of weekly flights between Ottawa and London have experienced delays in the past year, with the average delay time being 132 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 Friday 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, andVirgin Atlantic 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
463 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Porter Airlines
8.0
Very good
463 reviews
Porter Airlines
8.0
Very good
463 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Air Transat
7.7
Good
581 reviews
Porter Airlines
8.0
Very good
463 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Virgin Atlantic
7.4
Good
694 reviews
Porter Airlines
8.0
Very good
463 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Air Canada
7.1
Good
11,696 reviews
Porter Airlines
8.0
Very good
463 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.
Lufthansa
6.8
Okay
8,237 reviews
Porter Airlines
8.0
Very good
463 reviews
Check prices

Entertainment

6.9

Food

7.6

Overall

8.0

Boarding

8.2

Comfort

8.0

Crew

8.6

Reviews

1 / 20
8.0
Excellent

D,Sep 2026

YHM - YVR

The flight including check-in, checked baggage, boarding, flight and timing were great. My checked bag was delayed two days which was concerning. They did deliver it to my door though which was great.

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 0 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 10h 35m. The distance between Ottawa and London is about 5375 km.

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

    Our cheapest airline available from Ottawa to London is Virgin Atlantic. Our recent data shows that you can find tickets from as low as C$ 489 on this airline. Additional options worth looking into are Air Transat and Air France, starting at C$ 691 and C$ 787 round-trip. You may be able to fly from Ottawa to London for 52% 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 (41%), Aegean Airlines (41%), Austrian Airlines (41%).

  • What are the cheapest flights from Ottawa to London?

    The cheapest flight price from Ottawa to London is C$ 918. On average you can expect to pay C$ 1,370. The most popular route, (Ottawa - London Heathrow), can usually be booked for C$ 885.

  • 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$ 850). Flying from Ottawa to London in December is currently the most expensive (average of C$ 1,347). 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Romford
Twickenham
Ilford
Bromley
Sutton
Luton
Slough
Marlow
Cobham
Hounslow
Wembley
Watford
High Wycombe

Browse thousands of different options on Cheapflights for your next trip

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

AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapestC$ 489AverageC$ 981FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air TransatCheapestC$ 691AverageC$ 821FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air FranceCheapestC$ 787AverageC$ 1,055FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapestC$ 916AverageC$ 1,139FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 930AverageC$ 1,160FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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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