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Ottawa

$403+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
Jul 21 — Jul 281
Tue 7/21
Tue 7/28
1 adult, Economy
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Cheapflights Tip: The best prices from London to Ottawa are usually found in June or May, booked 87 days in advance, depart on a Sunday or Thursday 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 June 21, 2026.

This Air Transat deal was found by Cheapflights users on 6/18. 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 Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:40 am
LGW
-
YOW
Nonstop8h 00m
Air Transat
Thu 10/14:00 pm
YOW
-
LGW
1 stop10h 55m
Air Transat
Deal found 6/18$513
This Air Transat deal was found by Cheapflights users on 6/16. 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 Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/159:40 am
LGW
-
YOW
Nonstop8h 00m
Air Transat
Mon 9/217:00 am
YOW
-
LGW
1 stop19h 55m
Air Transat
Deal found 6/16$514
This Air Transat deal was found by Cheapflights users on 6/19. 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 Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:40 pm
LGW
-
YOW
1 stop12h 20m
Air Transat
Sat 10/37:00 am
YOW
-
LGW
1 stop19h 55m
Air Transat
Deal found 6/19$516
This Air Transat deal was found by Cheapflights users on 6/18. 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 Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1712:40 pm
LGW
-
YOW
1 stop12h 20m
Air Transat
Thu 10/14:00 pm
YOW
-
LGW
1 stop10h 55m
Air Transat
Deal found 6/18$521
This Cheapflightsfares deal was found by Cheapflights users on 6/19. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:30 am
LHR
-
YOW
2 stops18h 40m
Lufthansa
Tue 9/152:35 pm
YOW
-
LHR
1 stop10h 55m
Lufthansa
Deal found 6/19$526
This FlightHub deal was found by Cheapflights users on 6/21. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/209:40 am
LGW
-
YOW
Nonstop8h 00m
Air Transat
Sun 9/277:40 pm
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 6/21$538
This Air Transat deal was found by Cheapflights users on 6/19. 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 Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2011:35 am
LGW
-
YOW
1 stop11h 00m
Air Transat
Tue 9/294:00 pm
YOW
-
LGW
1 stop13h 45m
Air Transat
Deal found 6/19$540
This Kiwi.com deal was found by Cheapflights users on 6/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/19:30 am
LHR
-
YOW
1 stop9h 28m
Multiple Airlines
Thu 7/98:05 pm
YOW
-
LHR
1 stop10h 45m
Multiple Airlines
Deal found 6/18$541
This Air Transat deal was found by Cheapflights users on 6/19. 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 Air Transat is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/169:40 am
LGW
-
YOW
1 stop15h 20m
Air Transat
Tue 9/294:00 pm
YOW
-
LGW
1 stop13h 45m
Air Transat
Deal found 6/19$545
This Air Canada deal was found by Cheapflights users on 6/20. 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 Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1112:40 pm
LHR
-
YOW
1 stop24h 45m
Air Canada
Tue 9/152:35 pm
YOW
-
LHR
1 stop10h 55m
Air Canada
Deal found 6/20$547
This Cheapflightsfares deal was found by Cheapflights users on 6/18. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/12:10 pm
LHR
-
YOW
Nonstop7h 10m
Lufthansa
Thu 7/96:55 pm
YOW
-
LHR
Nonstop6h 35m
Lufthansa
Deal found 6/18$549
This Air Canada deal was found by Cheapflights users on 6/18. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/112:40 pm
LHR
-
YOW
1 stop11h 13m
Air Canada
Thu 7/96:55 pm
YOW
-
LHR
Nonstop6h 35m
Air Canada
Deal found 6/18$551

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 June 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$513
(Air Transat)

One-way from

$403
(Kiwi.com)

Popular in

December

Cheapest in

June

Average price

$565

Good round-trip deal

$504 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. 4% potential increase in price ($35 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 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

LHR - YOW

LHRYOW

London Heathrow

Fri 9/11

7:25 am-6:59 pm

2 stops16h 34m

Ottawa

Sat 9/26

2:52 pm-10:15 am

2 stops14h 23m

$578

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Tue 9/1

5:00 pm-3:00 pm

1 stop27h 00m

Ottawa

Mon 9/7

5:10 pm-4:00 pm

1 stop17h 50m

$616

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 8/27

9:40 am-9:20 pm

1 stop16h 40m

Ottawa

Mon 9/7

6:35 pm-10:45 am

1 stop11h 10m

$682

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Wed 8/26

7:30 am-6:59 pm

2 stops16h 29m

Ottawa

Sat 9/12

6:05 am-5:55 am

1 stop18h 50m

$682

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Thu 8/27

6:30 am-3:00 pm

2 stops13h 30m

Ottawa

Sun 8/30

5:25 pm-7:55 am

1 stop9h 30m

$709
Quickest round-trip

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 9/6

9:40 am-12:40 pm

Nonstop8h 00m

Ottawa

Tue 3/9

5:45 pm-9:45 am

1 stop11h 00m

$743

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Tue 9/8

12:40 pm-9:35 pm

1 stop13h 55m

Ottawa

Fri 3/12

5:45 pm-9:45 am

1 stop11h 00m

$808

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Thu 8/27

9:40 am-12:25 am

1 stop19h 45m

Ottawa

Sun 8/30

7:40 pm-7:55 am

Nonstop7h 15m

$822

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Sun 7/19

11:05 am-9:35 pm

1 stop15h 30m

Ottawa

Sat 8/29

5:20 pm-11:55 am

1 stop13h 35m

$829

LondonOttawa

LHR - YOW

LHRYOW

London Heathrow

Fri 8/28

6:30 am-3:00 pm

2 stops13h 30m

Ottawa

Tue 9/8

5:30 pm-7:55 am

1 stop9h 25m

$839

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/18

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 June.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust 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 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

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

Currently, October is the cheapest month in which you can book a flight from London to Ottawa (average of $87). Flying from London to Ottawa in June is currently the most expensive (average of $1,024). 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 June 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 much does it cost to fly round-trip from London to Ottawa?

How often are flights from London to Ottawa delayed?

About 12% of weekly flights between London and Ottawa have experienced delays in the past year, with the average delay time being 233 minutes.

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

Historically, flights departing in the morning 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 Sunday 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 11% of flights being delayed.

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

To ensure you get the cheapest price possible for a flight from London to Ottawa, you should look to book at least 71 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.

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 June 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
11,236 reviews

Entertainment

6.8

Food

6.3

Comfort

7.1

Boarding

7.3

Crew

7.8

Overall

7.1

Reviews

1 / 20
8.0
Excellent

John,Apr 2026

YVR - YOW

Crew was very attentive and meals were good. My wife required a wheel chair due to an accident on vacation. The service in Toronto was poor and Ottawa no better. Southeast Asia could teach them lots. Flight originated in Manila on ANA which was cancelled due to a mechanical issue. We were put up overnight in the Savoy Hotel with dinner and breakfast. The airline staff and hotel staff were fantastic.
Air Canada
7.1
Good
11,236 reviews
Air Canada
7.1
Good
11,236 reviews

Entertainment

6.8

Food

6.3

Comfort

7.1

Boarding

7.3

Crew

7.8

Overall

7.1

Reviews

1 / 20
8.0
Excellent

John,Apr 2026

YVR - YOW

Crew was very attentive and meals were good. My wife required a wheel chair due to an accident on vacation. The service in Toronto was poor and Ottawa no better. Southeast Asia could teach them lots. Flight originated in Manila on ANA which was cancelled due to a mechanical issue. We were put up overnight in the Savoy Hotel with dinner and breakfast. The airline staff and hotel staff were fantastic.
Lufthansa
6.8
Okay
8,085 reviews
Air Canada
7.1
Good
11,236 reviews

Entertainment

6.8

Food

6.3

Comfort

7.1

Boarding

7.3

Crew

7.8

Overall

7.1

Reviews

1 / 20
8.0
Excellent

John,Apr 2026

YVR - YOW

Crew was very attentive and meals were good. My wife required a wheel chair due to an accident on vacation. The service in Toronto was poor and Ottawa no better. Southeast Asia could teach them lots. Flight originated in Manila on ANA which was cancelled due to a mechanical issue. We were put up overnight in the Savoy Hotel with dinner and breakfast. The airline staff and hotel staff were fantastic.

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 $578, United Airlines can have you in Ottawa from London in 16h 34m. There are 3320 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 $728, 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.

  • 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 (94%), Air Canada (94%) and Austrian Airlines (94%).

  • 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, October is the cheapest month in which you can book a flight from London to Ottawa (average of $87). Flying from London to Ottawa in June is currently the most expensive (average of $1,024). 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

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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 June 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$728Average$866FlexibilityNo cancel feeOn-time67%

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