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Ottawa

$370+ 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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
LON — YOW
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheapflights Tip: The best prices from London to Ottawa are usually found in February or May, booked 88 days in advance, depart on a Wednesday 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 January 29, 2026.

This KLM deal was found by Cheapflights users on 1/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/132:30 pm
LHR
-
YOW
1 stop15h 09m
Multiple Airlines
Tue 2/175:20 pm
YOW
-
LHR
1 stop9h 35m
Multiple Airlines
Deal found 1/27$548
This Air France deal was found by Cheapflights users on 1/27. 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 2/246:20 am
LHR
-
YOW
1 stop13h 50m
Multiple Airlines
Tue 3/35:20 pm
YOW
-
LHR
2 stops15h 30m
Multiple Airlines
Deal found 1/27$559
This Mytrip deal was found by Cheapflights users on 1/27. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/2411:40 am
LGW
-
YOW
1 stop18h 03m
Air Transat
Tue 3/310:00 am
YOW
-
LGW
1 stop18h 45m
Air Transat
Deal found 1/27$579
This KLM deal was found by Cheapflights users on 1/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/132:30 pm
LHR
-
YOW
1 stop15h 09m
KLM
Tue 2/175:20 pm
YOW
-
LHR
2 stops15h 30m
KLM
Deal found 1/27$580
This KLM deal was found by Cheapflights users on 1/27. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/246:30 am
LHR
-
YOW
2 stops13h 40m
KLM
Tue 3/35:20 pm
YOW
-
LHR
2 stops15h 30m
KLM
Deal found 1/27$591
This Air Transat deal was found by Cheapflights users on 1/28. 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.
Sat 3/711:40 am
LGW
-
YOW
1 stop24h 43m
Air Transat
Wed 3/186:55 pm
YOW
-
LGW
1 stop10h 50m
Air Transat
Deal found 1/28$596
This Air Transat deal was found by Cheapflights users on 1/28. 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 2/411:40 am
LGW
-
YOW
1 stop11h 48m
Air Transat
Fri 3/276:55 pm
YOW
-
LGW
1 stop10h 50m
Air Transat
Deal found 1/28$598
This Air Transat deal was found by Cheapflights users on 1/28. 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 8/169:40 am
LGW
-
YOW
Nonstop8h 00m
Air Transat
Sun 8/237:40 pm
YOW
-
LGW
Nonstop7h 15m
Air Transat
Deal found 1/28$599
This Air France deal was found by Cheapflights users on 1/27. 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.
Mon 2/167:20 pm
LHR
-
YOW
1 stop24h 50m
Air France
Tue 4/75:10 pm
YOW
-
LHR
1 stop18h 25m
Air France
Deal found 1/27$614
This FlightHub deal was found by Cheapflights users on 1/28. 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.
Sat 3/711:40 am
LGW
-
YOW
1 stop24h 43m
Air Transat
Thu 3/198:40 am
YOW
-
LGW
1 stop21h 05m
Air Transat
Deal found 1/28$620
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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.
Sat 6/202:10 pm
LHR
-
YOW
Nonstop7h 55m
Lufthansa
Thu 7/26:55 pm
YOW
-
LHR
Nonstop6h 35m
Lufthansa
Deal found 1/27$621
This Air Transat deal was found by Cheapflights users on 1/28. 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 2/2511:40 am
LGW
-
YOW
1 stop18h 03m
Air Transat
Fri 3/63:05 pm
YOW
-
LGW
1 stop13h 40m
Air Transat
Deal found 1/28$624

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$548
(KLM)

One-way from

$370
(Air Transat)

Popular in

August

Cheapest in

February

Average price

$687
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. 10% potential increase in price ($85 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 2026.
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

Tue 2/24

6:30 am-3:10 pm

2 stops13h 40m

Ottawa

Tue 3/3

5:20 pm-1:50 pm

2 stops15h 30m

$591

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Tue 2/24

11:40 am-6:33 pm

1 stop11h 53m

Ottawa

Tue 3/3

10:00 am-9:45 am

1 stop18h 45m

$595

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 3/14

11:40 am-7:28 pm

1 stop11h 48m

Ottawa

Thu 3/26

6:55 pm-9:45 am

1 stop10h 50m

$596

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 3/7

11:40 am-7:23 am

1 stop24h 43m

Ottawa

Thu 3/19

8:40 am-9:45 am

1 stop21h 05m

$620

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sat 3/7

11:40 am-7:23 am

1 stop24h 43m

Ottawa

Tue 3/17

10:00 am-9:45 am

1 stop19h 45m

$620

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 3/8

11:40 am-4:48 pm

1 stop33h 08m

Ottawa

Wed 3/18

10:00 am-9:45 am

1 stop19h 45m

$624

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 2/25

11:40 am-12:43 am

1 stop18h 03m

Ottawa

Fri 3/6

3:05 pm-9:45 am

1 stop13h 40m

$624

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Wed 4/22

12:40 pm-12:41 am

1 stop17h 01m

Ottawa

Sat 4/25

6:45 am-10:45 am

1 stop23h 00m

$637

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 3/8

11:40 am-8:23 am

1 stop24h 43m

Ottawa

Tue 3/17

10:00 am-9:45 am

1 stop19h 45m

$647

LondonOttawa

LGW - YOW

LGWYOW

London Gatwick

Sun 3/8

11:40 am-8:23 am

1 stop24h 43m

Ottawa

Thu 3/19

8:40 am-9:45 am

1 stop21h 05m

$647

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 37 results
1
2
3
4
  • 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 January 23, 2026.

To ensure you get the cheapest price possible for a flight from London to Ottawa, you should look to book at least 88 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 $512). 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 January 29, 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 9% of weekly flights between London and Ottawa have experienced delays in the past year, with the average delay time being 253 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 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 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 January 29, 2026.
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
10,667 reviews

Boarding

7.3

Comfort

7.1

Crew

7.8

Entertainment

6.8

Overall

7.1

Food

6.3

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.
Air Canada
7.1
Good
10,667 reviews
Air Canada
7.1
Good
10,667 reviews

Boarding

7.3

Comfort

7.1

Crew

7.8

Entertainment

6.8

Overall

7.1

Food

6.3

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.

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 $595, KLM can have you in Ottawa from London in 11h 53m. 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 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 TAP AIR PORTUGAL (74%), Air Canada (71%) and Austrian Airlines (71%).

  • 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 $512). 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

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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 Pearson Intl flights
Edinburgh to Pearson Intl flights
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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest$632Average$728FlexibilityNo cancel feeOn-time67%

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