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Ottawa

$281+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
Apr 20 — Apr 271
Mon 4/20
Mon 4/27
1 adult, Economy
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Cheapflights Tip: The best prices from London to Ottawa are usually found in June or May, booked 90 days in advance, depart on a Friday or Wednesday and return on a Friday

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 March 21, 2026.

This Expedia deal was found by Cheapflights users on 3/21. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/159:40 am
LGW
-
YOW
Nonstop8h 00m
Air Transat
Sun 5/247:40 pm
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 3/21$506
This Air Transat deal was found by Cheapflights users on 3/20. 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.
Sun 5/319:40 am
LGW
-
YOW
Nonstop8h 00m
Air Transat
Sun 6/77:40 pm
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 3/20$510
This Air Transat deal was found by Cheapflights users on 3/20. 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.
Tue 5/2612:40 pm
LGW
-
YOW
1 stop12h 20m
Air Transat
Sun 6/77:40 pm
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 3/20$518
This Air Transat deal was found by Cheapflights users on 3/20. 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.
Tue 5/2612:40 pm
LGW
-
YOW
1 stop12h 20m
Air Transat
Sat 6/68:40 am
YOW
-
LGW
1 stop18h 15m
Air Transat
Deal found 3/20$526
This SmartFares deal was found by Cheapflights users on 3/18. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/312:40 pm
LGW
-
YOW
1 stop16h 45m
Air Transat
Sat 10/178:40 am
YOW
-
LGW
1 stop21h 05m
Air Transat
Deal found 3/18$532
This Air Transat deal was found by Cheapflights users on 3/20. 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 5/2712:40 pm
LGW
-
YOW
1 stop12h 20m
Air Transat
Sun 6/77:40 pm
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 3/20$545
This Air Transat deal was found by Cheapflights users on 3/20. 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 5/2712:40 pm
LGW
-
YOW
1 stop12h 20m
Air Transat
Sat 6/67:15 pm
YOW
-
LGW
1 stop10h 30m
Air Transat
Deal found 3/20$553
This Trip.com deal was found by Cheapflights users on 3/19. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/511:35 am
LGW
-
YOW
1 stop11h 00m
Air Transat
Thu 6/184:00 pm
YOW
-
LGW
1 stop10h 55m
Air Transat
Deal found 3/19$572
This Air Transat deal was found by Cheapflights users on 3/20. 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.
Thu 5/2812:40 pm
LGW
-
YOW
1 stop12h 20m
Air Transat
Fri 6/57:40 pm
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 3/20$575
This Air France deal was found by Cheapflights users on 3/21. 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.
Fri 5/156:15 am
LHR
-
YOW
1 stop13h 45m
Air France
Sun 5/245:25 pm
YOW
-
LHR
1 stop9h 30m
Air France
Deal found 3/21$577
This Air Transat deal was found by Cheapflights users on 3/20. 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.
Thu 5/2812:40 pm
LGW
-
YOW
1 stop12h 20m
Air Transat
Mon 6/86:35 pm
YOW
-
LGW
1 stop11h 10m
Air Transat
Deal found 3/20$584
This Lufthansa deal was found by Cheapflights users on 3/16. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/162:10 pm
LHR
-
YOW
Nonstop7h 55m
Lufthansa
Wed 5/279:00 pm
YOW
-
LHR
Nonstop6h 35m
Lufthansa
Deal found 3/16$589

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 March 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$506
(Expedia)

One-way from

$281
(Kiwi.com)

Popular in

August

Cheapest in

June

Average price

$769

Good round-trip deal

$739 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. 6% potential increase in price ($53 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 21, 2026.
Use the filters below to find and compare flights from London to Ottawa that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Tue 5/26

12:40 pm-8:00 pm

1 stop12h 20m

Ottawa

Tue 6/9

7:40 pm-7:55 am

Nonstop7h 15m

$518

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Fri 6/5

9:40 am-12:40 pm

Nonstop8h 00m

Ottawa

Thu 6/18

4:00 pm-7:55 am

1 stop10h 55m

$545

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 5/28

12:40 pm-8:00 pm

1 stop12h 20m

Ottawa

Mon 6/8

6:35 pm-10:45 am

1 stop11h 10m

$584

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 5/15

6:30 am-3:00 pm

2 stops13h 30m

Ottawa

Sun 5/24

5:25 pm-10:30 am

1 stop12h 05m

$607

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 5/22

6:50 am-4:38 pm

2 stops14h 48m

Ottawa

Mon 6/1

10:44 am-6:55 am

2 stops15h 11m

$608

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sat 5/30

7:30 am-9:35 pm

2 stops19h 05m

Ottawa

Fri 6/5

10:44 am-7:15 am

2 stops15h 31m

$610

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 6/5

6:55 am-10:03 am

2 stops32h 08m

Ottawa

Thu 6/18

6:05 am-9:35 pm

1 stop10h 30m

$610

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 5/15

10:50 am-10:05 pm

2 stops16h 15m

Ottawa

Sun 5/24

2:52 pm-9:20 am

2 stops13h 28m

$612

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 6/17

7:25 am-10:03 am

2 stops31h 38m

Ottawa

Wed 6/24

10:00 am-10:15 am

2 stops19h 15m

$612

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 4/25

12:40 pm-12:41 am

1 stop17h 01m

Ottawa

Wed 10/7

7:00 am-10:45 am

1 stop22h 45m

$636

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/17

Showing 1-10 of 44 resultsSorted by cheapest first
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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 March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on London-Ottawa flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 March 13, 2026.

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, September is the cheapest month in which you can book a flight from London to Ottawa (average of $381). Flying from London to Ottawa in December is currently the most expensive (average of $516). 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 March 21, 2026.

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 9% of weekly flights between London and Ottawa have experienced delays in the past year, with the average delay time being 236 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?

Thursday 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 9% 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 March 21, 2026.
Read through reviews of airlines operating flights from London to Ottawa, such as Air Canada and Lufthansa. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,821 reviews

Crew

7.8

Comfort

7.1

Boarding

7.3

Food

6.3

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.
Air Canada
7.1
Good
10,821 reviews
Air Canada
7.1
Good
10,821 reviews

Crew

7.8

Comfort

7.1

Boarding

7.3

Food

6.3

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.
Lufthansa
6.8
Okay
7,858 reviews
Air Canada
7.1
Good
10,821 reviews

Crew

7.8

Comfort

7.1

Boarding

7.3

Food

6.3

Overall

7.1

Entertainment

6.8

Reviews

1 / 20
2.0
Mediocre

Anonymous,Feb 2026

YXE - YYZ

We were over three hours delayed leaving Saskatoon and missed our connection to Montreal. We were then rerouted all the way to Zurich. We were over seven hours late getting to our final destination. Then our luggage was lost for lost for three days. All three flights were delayed and our trip was definitely impacted.

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 2 inbound flights 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 $518, Air Transat can have you in Ottawa from London in 12h 20m. 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 $640, 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 13% 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 Air Canada (89%), Austrian Airlines (89%) and SriLankan Airlines (89%).

  • What are the cheapest flights from London to Ottawa?

    On average you can expect to pay $838 for a flight from London to Ottawa. The cheapest flight overall is $677 while the most popular route, (London Heathrow - Ottawa) is currently priced at $594.

  • 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, September is the cheapest month in which you can book a flight from London to Ottawa (average of $381). Flying from London to Ottawa in December is currently the most expensive (average of $516). 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

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Alternative routes for London to Ottawa

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Pierre Elliott Trudeau Intl flights
Gatwick 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 March 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$640Average$775FlexibilityNo cancel feeOn-time67%

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