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Cheap flights from Ottawa to London from C$ 364

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 17/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LON
19 Nov — 26 Nov1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Ottawa to London are usually found in February or April, booked 54 days in advance, depart on a Thursday or Friday and return on a Wednesday

Cheap flight deals from Ottawa to London

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to London (LON). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 20 October 2025.

Round-trip from

C$ 859

One-way from

C$ 364

Popular in

December

Cheapest in

February

Average price

C$ 1,006

Good round-trip deal

C$ 1,034 or less

Good one-way deal

C$ 986 or less
Air Transat
  • Air Transat
  • 8/11-13/11
  • 2 total stops
  • 21h 34m total
  • Ottawa to London
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17/1
  • 17/1
  • 1 total stop
  • 19h 35m total
  • Ottawa to London
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Highest demand for flights based on searches. 5% potential increase in price (C$ 77 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease (C$ 27 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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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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Find flight deals from Ottawa to London

Enter your travel dates to find the best prices.

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 20 October 2025.

Sat 8/116:55 p.m.YOW - LGW
1 stop9h 50mAir Transat
Thu 13/1111:40 a.m.LGW - YOW
1 stop11h 44mAir Transat
Deal found 19/10C$ 859
Sun 16/1110:30 a.m.YOW - LHR
2 stops15h 40mMultiple Airlines
Sun 23/116:00 a.m.LHR - YOW
2 stops18h 18mMultiple Airlines
Deal found 19/10C$ 861
Sun 16/116:55 p.m.YOW - LGW
1 stop9h 50mAir Transat
Sun 23/1111:40 a.m.LGW - YOW
1 stop25h 44mAir Transat
Deal found 19/10C$ 863
Thu 20/1110:30 a.m.YOW - LHR
2 stops15h 40mMultiple Airlines
Mon 24/1111:10 a.m.LHR - YOW
2 stops16h 08mMultiple Airlines
Deal found 19/10C$ 865
Tue 2/122:05 p.m.YOW - LHR
2 stops12h 05mMultiple Airlines
Tue 9/129:00 a.m.LHR - YOW
2 stops13h 42mMultiple Airlines
Deal found 20/10C$ 866
Tue 18/113:05 p.m.YOW - LGW
1 stop13h 40mAir Transat
Tue 25/1111:40 a.m.LGW - YOW
1 stop11h 44mAir Transat
Deal found 19/10C$ 876
Thu 20/116:45 a.m.YOW - LGW
1 stop22h 00mAir Transat
Tue 25/1111:40 a.m.LGW - YOW
1 stop17h 59mAir Transat
Deal found 20/10C$ 879
Thu 20/113:05 p.m.YOW - LGW
1 stop13h 40mAir Transat
Mon 24/1111:40 a.m.LGW - YOW
1 stop11h 44mAir Transat
Deal found 19/10C$ 880
Mon 24/112:50 p.m.YOW - LHR
1 stop11h 20mMultiple Airlines
Tue 2/129:00 a.m.LHR - YOW
2 stops13h 42mMultiple Airlines
Deal found 18/10C$ 880
Sun 16/1110:30 a.m.YOW - LHR
2 stops15h 40mAir Canada
Sun 23/111:25 p.m.LHR - YOW
1 stop25h 17mAir Canada
Deal found 19/10C$ 883
Wed 3/129:55 p.m.YOW - LHR
Nonstop6h 25mMultiple Airlines
Wed 10/126:35 a.m.LHR - YOW
2 stops17h 03mMultiple Airlines
Deal found 19/10C$ 886
Sun 9/116:45 a.m.YOW - LGW
1 stop22h 00mAir Transat
Sun 16/1111:40 a.m.LGW - YOW
1 stop25h 44mAir Transat
Deal found 20/10C$ 891

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 20 October 2025.
Use the filters below to find and compare flights from Ottawa to London that are best for you.

Fly from

Ottawa

Fly to

London

Route

Depart

Return

Price

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sun 16/11

3:05 p.m.-9:45 a.m.

1 stop13h 40m

London Gatwick

Wed 19/11

11:40 a.m.-12:39 a.m.

1 stop17h 59m

C$ 859

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Tue 11/11

10:00 a.m.-9:45 a.m.

1 stop18h 45m

London Gatwick

Wed 19/11

11:40 a.m.-12:39 a.m.

1 stop17h 59m

C$ 859

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Mon 2/3

6:55 p.m.-9:45 a.m.

1 stop9h 50m

London Gatwick

Fri 6/3

11:40 a.m.-8:25 a.m.

1 stop25h 45m

C$ 863

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sat 28/2

6:55 p.m.-9:45 a.m.

1 stop9h 50m

London Gatwick

Mon 9/3

11:40 a.m.-8:25 a.m.

1 stop24h 45m

C$ 863

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sun 16/11

6:55 p.m.-9:45 a.m.

1 stop9h 50m

London Gatwick

Sun 23/11

11:40 a.m.-8:24 a.m.

1 stop25h 44m

C$ 863

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 2/12

2:05 p.m.-7:10 a.m.

2 stops12h 05m

London Heathrow

Tue 9/12

9:00 a.m.-5:42 p.m.

2 stops13h 42m

C$ 866

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Wed 3/12

10:00 a.m.-9:45 a.m.

1 stop18h 45m

London Gatwick

Sun 7/12

11:40 a.m.-8:25 a.m.

1 stop25h 45m

C$ 879

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sun 1/3

6:55 p.m.-9:45 a.m.

1 stop9h 50m

London Gatwick

Sat 7/3

11:40 a.m.-7:25 a.m.

1 stop24h 45m

C$ 882

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sat 28/2

6:55 p.m.-9:45 a.m.

1 stop9h 50m

London Gatwick

Sat 7/3

11:40 a.m.-7:25 a.m.

1 stop24h 45m

C$ 882

OttawaLondon

YOW - LGW

YOWLGW

Ottawa

Sun 9/11

6:45 a.m.-9:45 a.m.

1 stop22h 00m

London Gatwick

Sun 16/11

11:40 a.m.-8:24 a.m.

1 stop25h 44m

C$ 891

Flights are sorted by cheapest round-trip flights first.

Deals found on 19/10

Showing 1-10 of 60 results
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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
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

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

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to London. Price data was last updated on 17 October 2025.

Booking 54 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.

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

Currently, December is the cheapest month in which you can book a flight from Ottawa to London (average of C$ 482). Flying from Ottawa to London in July is currently the most expensive (average of C$ 904). 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?

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 20 October 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 18% on flights from Ottawa to London by exploring options for tickets in the evening.

What is the cheapest day to fly from Ottawa to London?

Use this chart to determine the cheapest time to fly round-trip from Ottawa to London. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Ottawa to London flight should consider departing on Tuesday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

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 50% 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.

Calgary (YYC) is the most affordable 1-stop option, with an average round-trip price of C$ 869.

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 Paris (CDG) have the shortest average one-way travel time for 1-stop routes: 10h 27m.

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 Chicago (ORD) offer the fastest connection on this route, with an average layover time of 2h 09m.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 20 October 2025.
Check out reviews from past customers who have flown with Air Transat,Air France, andUnited Airlines 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.
Air Transat
7.8
Good
466 reviews
Check prices

Crew

8.5

Comfort

7.4

Overall

7.8

Food

6.8

Entertainment

7.1

Boarding

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Air Transat
7.8
Good
466 reviews
Air Transat
7.8
Good
466 reviews
Check prices

Crew

8.5

Comfort

7.4

Overall

7.8

Food

6.8

Entertainment

7.1

Boarding

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Air France
7.4
Good
1,475 reviews
Air Transat
7.8
Good
466 reviews
Check prices

Crew

8.5

Comfort

7.4

Overall

7.8

Food

6.8

Entertainment

7.1

Boarding

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
United Airlines
7.4
Good
8,990 reviews
Air Transat
7.8
Good
466 reviews
Check prices

Crew

8.5

Comfort

7.4

Overall

7.8

Food

6.8

Entertainment

7.1

Boarding

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Air Canada
7.1
Good
10,334 reviews
Air Transat
7.8
Good
466 reviews
Check prices

Crew

8.5

Comfort

7.4

Overall

7.8

Food

6.8

Entertainment

7.1

Boarding

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.
Lufthansa
6.8
Okay
7,506 reviews
Air Transat
7.8
Good
466 reviews
Check prices

Crew

8.5

Comfort

7.4

Overall

7.8

Food

6.8

Entertainment

7.1

Boarding

7.9

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

YYZ - YUL

Easy, fast onboarding, very friendly staff. Seats were very narrow, OK for me but we were elbow to elbow with both neighbours of small size. The seat width should be indicated at the time of booking to prevent an uncomfortable situation with oversized travellers.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 3 outbound flights to London per day. You should also have plenty of airline options to choose from since 7 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 10m. The distance between Ottawa and London is about 5343 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$ 693 on this airline. Additional options worth looking into are Air France and Virgin Atlantic, starting at C$ 740 and C$ 743 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 (74%), Aegean Airlines (74%), Austrian Airlines (74%).

  • What are the cheapest flights from Ottawa to London?

    The cheapest flight price from Ottawa to London is C$ 653. On average you can expect to pay C$ 1,324. The most popular route, (Ottawa - London Heathrow), can usually be booked for C$ 861.

  • 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, December is the cheapest month in which you can book a flight from Ottawa to London (average of C$ 482). Flying from Ottawa to London in July is currently the most expensive (average of C$ 904). 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
Sutton
Hounslow
Slough
Marlow
Milton Keynes
Romford
Watford
Bedford
Luton
Southall
Gatwick

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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 20 October 2025.
Air Canada flights from Ottawa to London
Lufthansa flights from Ottawa to London
Air Transat flights from Ottawa to London
WestJet flights from Ottawa to London

Top 7 airlines flying from Ottawa to London

Discover the top 7 airlines that operate flights from Ottawa to London. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 20 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapestC$ 693AverageC$ 1,033FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air FranceCheapestC$ 740AverageC$ 935FlexibilityNo cancel feeOn-time77%
Search Air France flights
Virgin AtlanticCheapestC$ 743AverageC$ 829FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Porter AirlinesCheapestC$ 797AverageC$ 1,082FlexibilityNo cancel feeOn-time52%
Search Porter Airlines flights
United AirlinesCheapestC$ 904AverageC$ 1,125FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 909AverageC$ 1,067FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 971AverageC$ 1,085FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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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