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Cheap flights from London to Ottawa from £243

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Ottawa departing on 16/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap return flights

Air France Logo
15:20 - 00:22LHR-YOW
14h 02m2 stops
Air France Logo
17:15 - 13:45YOW-LHR
15h 30m1 stop
£407Air France
Find Deal
Mon, 8 Sep - Mon, 15 Sep
Virgin Atlantic Logo
06:15 - 15:05LHR-YOW
13h 50m1 stop
Virgin Atlantic Logo
17:15 - 16:35YOW-LHR
18h 20m1 stop
£414Virgin Atlantic
Find Deal
Tue, 1 Jul - Tue, 15 Jul
KLM Logo
17:50 - 00:22LHR-YOW
11h 32m1 stop
KLM Logo
17:15 - 10:45YOW-LHR
12h 30m2 stops
£451KLM
Find Deal
Sat, 27 Sep - Tue, 14 Oct
Air Transat Logo
09:40 - 08:05LGW-YOW
27h 25m1 stop
Air Transat Logo
07:00 - 10:45YOW-LGW
22h 45m1 stop
£468Air Transat
Find Deal
Tue, 1 Jul - Tue, 15 Jul
Air Transat Logo
10:00 - 08:05LGW-YOW
27h 05m1 stop
Air Transat Logo
11:20 - 07:55YOW-LGW
15h 35m1 stop
£473Air Transat
Find Deal
Thu, 3 Jul - Sat, 19 Jul
KLM Logo
06:30 - 15:05LHR-YOW
13h 35m2 stops
KLM Logo
17:15 - 10:45YOW-LHR
12h 30m2 stops
£488KLM
Find Deal
Sat, 28 Jun - Tue, 22 Jul
Air Canada Logo
14:05 - 16:25LHR-YOW
7h 20mdirect
Air Canada Logo
18:55 - 06:30YOW-LHR
6h 35mdirect
£513Air Canada
Find Deal
Mon, 8 Sep - Mon, 15 Sep
Air Canada Logo
12:40 - 15:00LHR-YOW
7h 20mdirect
Air Canada Logo
18:55 - 06:30YOW-LHR
6h 35mdirect
£517Air Canada
Find Deal
Wed, 10 Sep - Thu, 18 Sep
Lufthansa Logo
09:30 - 22:04LHR-YOW
17h 34m2 stops
Lufthansa Logo
21:00 - 08:35YOW-LHR
6h 35mdirect
£519Lufthansa
Find Deal
Tue, 9 Sep - Sat, 20 Sep
Lufthansa Logo
07:25 - 21:09LHR-YOW
18h 44m2 stops
Lufthansa Logo
21:00 - 08:35YOW-LHR
6h 35mdirect
£523Lufthansa
Find Deal
Wed, 10 Sep - Sat, 20 Sep

KLM flights from London to Ottawa

Our best KLM deals on London to Ottawa flight tickets
KLM
27 Sept
LHR17:50London Heathrow
11h 32m
1 stop
YOW00:22Ottawa
14 Oct
YOW17:15Ottawa
12h 30m
2 stops
LHR10:45London Heathrow
KLM
28 Jun
LHR06:30London Heathrow
13h 35m
2 stops
YOW15:05Ottawa
28 Jul
YOW17:15Ottawa
12h 30m
2 stops
LHR10:45London Heathrow
KLM
28 Jun
LHR06:30London Heathrow
13h 35m
2 stops
YOW15:05Ottawa
22 Jul
YOW17:15Ottawa
12h 30m
2 stops
LHR10:45London Heathrow

Lufthansa flights from London to Ottawa

Our best Lufthansa deals on London to Ottawa flight tickets
Lufthansa
9 Sept
LHR09:30London Heathrow
17h 34m
2 stops
YOW22:04Ottawa
20 Sept
YOW21:00Ottawa
6h 35m
LHR08:35London Heathrow
Lufthansa
10 Sept
LHR07:25London Heathrow
18h 44m
2 stops
YOW21:09Ottawa
20 Sept
YOW21:00Ottawa
6h 35m
LHR08:35London Heathrow
Lufthansa
16 Oct
LHR06:30London Heathrow
22h 49m
2 stops
YOW00:19Ottawa
24 Oct
YOW20:55Ottawa
30h 15m
1 stop
LHR08:10London Heathrow

See travel insights to Ottawa from

How to get the cheapest flight ticket from London to Ottawa

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between London and Ottawa?

What is the cheapest month to fly to Ottawa?

In general, January is the cheapest month to fly from London to Ottawa. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £462. If you aren’t able to travel during the month of January, then book flights to Ottawa from London during February instead. Flights to Ottawa in February, while not as cheap as those in January, still average around £471.

What is the cheapest day to depart on your flight to Ottawa?

The cheapest day to depart on your flight to Ottawa is on a Thursday when prices can be found for as low as £538. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Saturday because tickets tend to average around £599. These prices are subject to change though, so be sure to set up a Price Alert for flights to Ottawa.

What is the cheapest time of day to depart on your flight to Ottawa?

Flying to Ottawa from London in the evening is the least expensive time of day to depart. momondo users have found prices as low as £475 when looking at flights departing in the evening. In the morning is when there is more demand to fly to Ottawa, so prices are often more expensive at around £576 per ticket.

What is the cheapest London to Ottawa flight route?

Fly from London Heathrow to Ottawa for the best London - Ottawa flight prices

How far in advance should I book a flight to Ottawa?

You are more likely to see cheaper flights to Ottawa from London when booking 13 weeks ahead of your departure date. In general, you can expect to find flights to Ottawa for around £565 when searching 13 weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ottawa from London for as low as £403 on momondo.

What cabin class options are available on London to Ottawa flights?

There are 3 cabin classes available to choose from on London to Ottawa flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on London to Ottawa flights?

You could potentially save up to 15% on your flight if you consider stops on a London to Ottawa flight.

How have London to Ottawa flight prices changed over time?

As of June 2025, prices for London to Ottawa flights are approximately 6% cheaper when compared to flights at the same time last year.

When to book flights from London to Ottawa

Are you open to changing your travel dates? Check out the ideal times to fly from London to Ottawa according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap London to Ottawa (LON to YOW) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from London to Ottawa

Best price found

£243

Fastest flight time

7h 20m

Direct flights

Tue, Thu, Fri and Sun

Airports in Ottawa

1 airport
The best one-way flight to Ottawa from London in the past 72 hours is £243. The best return flight deal from London to Ottawa found on momondo in the last 72 hours is £407.
The fastest flight from London to Ottawa takes 7h 20m
Direct flights go from London to Ottawa on Tuesday, Thursday, Friday and Sunday. Airlines offering direct flights are: Lufthansa, Air Canada and Aegean Airlines.
There is 1 airport near Ottawa: Ottawa (YOW)

  • How far is London to Ottawa by plane?

    The straight-line distance from London to Ottawa is 3329.4 mi. In terms of flight time, this usually takes a little over 7h 20m.

  • When did momondo last update prices for flights from London to Ottawa Airport?

    Prices for flights from London to Ottawa Airport are updated daily.

  • How many operators does momondo search for flights from London to Ottawa Airport?

  • How old do you have to be to fly from London to Ottawa Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Ottawa Airport.

  • What documentation or ID do you need to fly to Ottawa Airport?

    The travel and health documents you'll need for your trip to Ottawa Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ottawa Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from London to Ottawa?

  • What is the most popular airline from London to Ottawa?


Best airlines flying from London to Ottawa

Compare and see reviews for airlines that fly from London to Ottawa with momondo
Airline
Rating
Free Cancellation
Price
Air CanadaPriceFrom £302Free CancellationRating
7.1
9,572 reviews
Search Air Canada flights
United AirlinesPriceFrom £336Free CancellationRating
7.4
8,809 reviews
Search United Airlines flights
KLMPriceFrom £358Free CancellationRating
7.8
1,364 reviews
Search KLM flights
Air FrancePriceFrom £363Free CancellationRating
7.5
1,467 reviews
Search Air France flights
Virgin AtlanticPriceFrom £375Free CancellationRating
7.4
653 reviews
Search Virgin Atlantic flights
Air TransatPriceFrom £409Free CancellationRating
7.8
398 reviews
Search Air Transat flights
LufthansaPriceFrom £443Free CancellationRating
6.8
7,158 reviews
Search Lufthansa flights
  • United Airlines Flights From London to Ottawa

    The lowest priced United Airlines flight from London to Ottawa from the last 72 hours was £454. Generally, United Airlines has 2 flights on this route every week with an average price of £473. United Airlines is rated 7.4/10 by our users.

  • Air Canada Flights From London to Ottawa

    Across 9,572 Air Canada reviews on momondo, the average score is 7.1/10. Air Canada flies from London to Ottawa about 2 times each week, with ticket deals ranging from £408 to £589. Price data is based on momondo searches in the last 72 hours.


Why use momondo?

Why should I use momondo to find a flight deal from London to Ottawa?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to Ottawa for you.

Can I find flights from London to Ottawa with flexible booking policies on momondo?

Flights from London to Ottawa with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from London to Ottawa?

Once all potential London to Ottawa flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from London to Ottawa right now. Can momondo alert me if prices change?

Price alerts on flights to Ottawa from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.


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