HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Ottawa

$353+ Cheap flights from London (LON) to Ottawa (YOW)

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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
Jan 16 — Jan 231
Fri 1/16
Fri 1/23
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from London to Ottawa with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from London to Ottawa are usually found in January or March, booked 90 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap flight deals from London to Ottawa

Cheapest flights from London to Ottawa
Explore the most affordable flight options available from London to Ottawa. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 17, 2025.

This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/167:30 amLHR - YOW
2 stops16h 25mUnited Airlines
Thu 1/87:27 pmYOW - LHR
1 stop10h 23mUnited Airlines
Deal found 12/15$743
This United Airlines deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1712:05 pmLHR - YOW
1 stop11h 50mUnited Airlines
Mon 1/1210:30 amYOW - LHR
2 stops16h 55mUnited Airlines
Deal found 12/15$775
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/174:20 pmLHR - YOW
1 stop27h 10mUnited Airlines
Mon 12/227:27 pmYOW - LHR
1 stop30h 13mUnited Airlines
Deal found 12/17$776
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2911:30 amLHR - YOW
2 stops34h 48mUnited Airlines
Tue 1/65:55 pmYOW - LHR
1 stop10h 15mUnited Airlines
Deal found 12/17$863
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/283:10 pmLHR - YOW
2 stops28h 17mUnited Airlines
Tue 1/66:00 amYOW - LHR
2 stops18h 55mUnited Airlines
Deal found 12/17$884
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/293:10 pmLHR - YOW
2 stops28h 17mUnited Airlines
Wed 1/79:45 amYOW - LHR
2 stops20h 20mUnited Airlines
Deal found 12/17$905
This United Airlines deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:50 pmLHR - YOW
1 stop14h 06mUnited Airlines
Tue 1/66:00 amYOW - LHR
2 stops18h 55mUnited Airlines
Deal found 12/17$925
This Air France deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:20 pmLHR - YOW
1 stop24h 50mAir France
Wed 12/315:20 pmYOW - LHR
1 stop20h 00mAir France
Deal found 12/15$1,042
This Orbitz deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:40 pmLHR - YOW
2 stops28h 00mMultiple Airlines
Wed 12/314:00 pmYOW - LHR
1 stop10h 10mMultiple Airlines
Deal found 12/15$1,046
This Orbitz deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:40 pmLHR - YOW
2 stops28h 00mSWISS
Wed 12/314:15 pmYOW - LHR
2 stops19h 05mSWISS
Deal found 12/15$1,049
This Air Transat deal was found by Cheapflights users on 12/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2411:40 amLGW - YOW
1 stop32h 16mAir Transat
Wed 1/710:00 amYOW - LGW
1 stop18h 45mAir Transat
Deal found 12/14$1,078
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2311:40 amLGW - YOW
1 stop25h 45mAir Transat
Wed 12/316:45 amYOW - LGW
1 stop22h 00mAir Transat
Deal found 12/15$1,259

Find flight deals from London to Ottawa

Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Ottawa (YOW). 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 December 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$650
(Air France)

One-way from

$353
(Kiwi.com)

Popular in

August

Cheapest in

January

Average price

$845

Good round-trip deal

$835 or less
Provider with most accurate pricing for London (LON)-Ottawa flight deals.
Search Deals
Provider most trusted by Cheapflights users for London (LON)-Ottawa flights.
Search Deals
From London (LON) to Ottawa
Search Deals
One-way flight from London (LON) to Ottawa
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($100 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from London (LON) to Ottawa.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to Ottawa 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 2,558,603 searches. Data last updated December 17, 2025.
Use the filters below to find and compare flights from London to Ottawa that are best for you.

Fly from

London

Fly to

Ottawa

Route

Depart

Return

Price

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 2/28

7:40 am-5:07 pm

1 stop14h 27m

Ottawa

Sat 2/28

7:55 pm-8:35 pm

2 stops19h 40m

$664

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 1/29

6:30 am-3:10 pm

2 stops13h 40m

Ottawa

Thu 2/5

5:20 pm-7:55 am

1 stop9h 35m

$675

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Tue 6/2

5:05 pm-3:05 pm

1 stop27h 00m

Ottawa

Sun 6/7

5:15 pm-9:25 am

1 stop11h 10m

$687

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 5/22

6:30 am-3:05 pm

2 stops13h 35m

Ottawa

Wed 5/27

5:25 pm-1:45 pm

1 stop15h 20m

$688

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 5/20

12:40 pm-8:01 pm

1 stop12h 21m

Ottawa

Sun 5/31

5:05 pm-10:45 am

1 stop12h 40m

$692

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 2/21

8:30 am-9:18 pm

2 stops17h 48m

Ottawa

Sat 2/28

6:00 am-5:55 am

2 stops18h 55m

$692

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 5/24

12:40 pm-8:01 pm

1 stop12h 21m

Ottawa

Mon 5/25

5:05 pm-10:45 am

1 stop12h 40m

$692

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 5/21

12:40 pm-8:01 pm

1 stop12h 21m

Ottawa

Sat 5/30

5:05 pm-7:55 am

1 stop9h 50m

$692

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 5/20

12:40 pm-8:01 pm

1 stop12h 21m

Ottawa

Sat 5/30

5:05 pm-7:55 am

1 stop9h 50m

$692

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Mon 5/18

12:40 pm-8:01 pm

1 stop12h 21m

Ottawa

Mon 5/25

11:20 am-10:45 am

1 stop18h 25m

$692

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 41 results
1
2
3
...
5

Compare providers for flights from London to Ottawa

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from London to Ottawa in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on London-Ottawa flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on London-Ottawa flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from London-Ottawa flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on London-Ottawa flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for London-Ottawa flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from London to Ottawa

Have a flexible travel schedule? Discover the best time to fly to Ottawa from London 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 London to Ottawa

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

Use this chart to determine the optimal time to book a round-trip flight from London to Ottawa. Price data was last updated on December 12, 2025.

To ensure you get the cheapest price possible for a flight from London to Ottawa, you should look to book at least 90 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, May is the cheapest month in which you can book a flight from London to Ottawa (average of $347). Flying from London to Ottawa in December is currently the most expensive (average of $506). 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 LON to YOW?

Find hourly flight availability from London to Ottawa. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London to Ottawa as you normally would.

How often are flights from London to Ottawa delayed?

About 8% of weekly flights between London and Ottawa have experienced delays in the past year, with the average delay time being 231 minutes.

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

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

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

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

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

Over the last year, Air Canada have had the lowest number of delays on this route, with just 8% of flights being delayed.

Reviews of airlines servicing Ottawa

Get insights into the airlines that provide service to Ottawa. 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 Ottawa. Reviews last updated December 17, 2025.
Read through reviews of airlines operating flights from London to Ottawa, such as Air Canada. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,534 reviews

Food

6.3

Boarding

7.3

Entertainment

6.8

Crew

7.8

Overall

7.1

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Shawna,Sep 2025

DCA - YYZ

Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given
Air Canada
7.1
Good
10,534 reviews
Air Canada
7.1
Good
10,534 reviews

Food

6.3

Boarding

7.3

Entertainment

6.8

Crew

7.8

Overall

7.1

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Shawna,Sep 2025

DCA - YYZ

Business class cabin was *freezing*. Landing was so hard it injured my back - no apology or explanation given

Related info for your journey

Find useful and relevant information for your journey from London to Ottawa. 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 into for flights to Ottawa from London?

    Ottawa (YOW) is the airport you will fly into if you book a flight from London to Ottawa. You should not have trouble finding flights to Ottawa from London; the airport handles an average of 1 inbound flight from London per day. You should also have plenty of airline options to choose from since 1 airline has flights to the Ottawa airport from London. It is only a 6.6 mi journey from Ottawa (YOW) to Ottawa’s city center.

  • How long is the flight from London to Ottawa?

    For as low as $692, Air Canada can have you in Ottawa from London in 12h 21m. There are 3340 mi between London and Ottawa. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from London to Ottawa round-trip?

    Currently priced at $632, Air Canada will fly you from London to Ottawa and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. You may be able to fly from London to Ottawa for 12% less than the average price by searching for this airline.

  • What are the most reliable airlines from London to Ottawa?

    The top 3 most reliable airlines when flying from London to Ottawa are Aegean Airlines (100%), United Airlines (95%) and TAP AIR PORTUGAL (92%).

  • What are the cheapest flights from London to Ottawa?

    On average you can expect to pay $866 for a flight from London to Ottawa. The cheapest flight overall is $728 while the most popular route, (London Heathrow - Ottawa) is currently priced at $584.

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

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

  • How can I find direct flights from London to Ottawa?

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

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

    Yes. Cheapflights offers flight deals from London to Ottawa 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 London to Ottawa?

    Currently, May is the cheapest month in which you can book a flight from London to Ottawa (average of $347). Flying from London to Ottawa in December is currently the most expensive (average of $506). 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

Traveling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Gatineau
Petawawa

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for London to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Pearson Intl flights
Heathrow to Pierre Elliott Trudeau Intl flights
Gatwick to Pearson Intl flights
Edinburgh to Pearson Intl flights
Manchester to Pearson Intl flights

Top airline flying from London to Ottawa

Discover the top airline that operate flights from London to Ottawa. 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 2,558,603 searches. Data last updated December 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$632Average$728FlexibilityNo cancel feeOn-time67%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.