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Cheap flights from London to Ottawa from £248

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 5/9. 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
17:25 - 08:00YOW-LHR
9h 35m1 stop
£380Air France
Find Deal
ven., 12 sept. - dim., 21 sept.
 Logo
19:45 - 15:00LHR-YOW
24h 15m1 stop
 Logo
05:55 - 10:40YOW-LHR
23h 45m1 stop
sam., 20 sept. - ven., 3 oct.
Virgin Atlantic Logo
14:45 - 15:00LHR-YOW
29h 15m1 stop
Virgin Atlantic Logo
17:15 - 13:45YOW-LHR
15h 30m1 stop
£393Virgin Atlantic
Find Deal
sam., 20 sept. - ven., 3 oct.
Air Transat Logo
12:40 - 20:35LGW-YOW
12h 55m1 stop
Air Transat Logo
17:05 - 10:45YOW-LGW
12h 40m1 stop
£483Air Transat
Find Deal
mar., 14 oct. - jeu., 23 oct.
Air Canada Logo
13:25 - 22:18LHR-YOW
12h 53m1 stop
Air Canada Logo
14:50 - 07:10YOW-LHR
11h 20m1 stop
£484Air Canada
Find Deal
lun., 27 oct. - lun., 3 nov.
Air Canada Logo
14:05 - 20:14LHR-YOW
11h 09m1 stop
Air Canada Logo
21:00 - 08:35YOW-LHR
6h 35mdirect
£486Air Canada
Find Deal
mer., 1 oct. - mer., 22 oct.
Air Transat Logo
12:40 - 20:35LGW-YOW
12h 55m1 stop
Air Transat Logo
07:00 - 10:45YOW-LGW
22h 45m1 stop
£495Air Transat
Find Deal
mar., 14 oct. - jeu., 23 oct.
Virgin Atlantic Logo
17:50 - 00:22LHR-YOW
11h 32m1 stop
Virgin Atlantic Logo
17:15 - 10:30YOW-LHR
12h 15m1 stop
£536Virgin Atlantic
Find Deal
mer., 27 août - sam., 6 sept.
Lufthansa Logo
08:45 - 00:19LCY-YOW
20h 34m2 stops
Lufthansa Logo
13:55 - 16:25YOW-LCY
21h 30m2 stops
£752Lufthansa
Find Deal
mar., 14 oct. - jeu., 23 oct.
Lufthansa Logo
08:55 - 21:20LCY-YOW
17h 25m2 stops
Lufthansa Logo
13:55 - 08:20YOW-LCY
13h 25m2 stops
£1,272Lufthansa
Find Deal
ven., 25 juil. - jeu., 4 sept.

Air France flights from London to Ottawa

Our best Air France deals on London to Ottawa flight tickets
Air France
12 Sept
LHR15:20London Heathrow
14h 02m
2 stops
YOW00:22Ottawa
21 Sept
YOW17:25Ottawa
9h 35m
1 stop
LHR08:00London Heathrow
Air France
20 Sept
LHR17:35London Heathrow
26h 25m
1 stop
YOW15:00Ottawa
3 Oct
YOW17:15Ottawa
12h 15m
1 stop
LHR10:30London Heathrow
Air France
12 Sept
LHR06:15London Heathrow
13h 50m
1 stop
YOW15:05Ottawa
21 Sept
YOW17:25Ottawa
9h 35m
1 stop
LHR08:00London Heathrow

SWISS flights from London to Ottawa

Our best SWISS deals on London to Ottawa flight tickets
SWISS
17 Sept
LCY09:25London City
36h 39m
2 stops
YOW17:04Ottawa
23 Sept
YOW15:55Ottawa
20h 35m
2 stops
LCY17:30London City
SWISS
16 Sept
LCY13:05London City
56h 59m
2 stops
YOW17:04Ottawa
23 Sept
YOW15:55Ottawa
20h 35m
2 stops
LCY17:30London City
SWISS
27 Oct
LCY09:15London City
16h 03m
2 stops
YOW21:18Ottawa
3 Nov
YOW16:10Ottawa
15h 40m
2 stops
LCY12:50London City

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 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 £458. 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 £467.

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 £534. 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 £594. 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 £470 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 £570 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 weeks ahead of your departure date. In general, you can expect to find flights to Ottawa for around £558 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ottawa from London for as low as £399 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 34% 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 July 2025, prices for London to Ottawa flights are approximately 37% 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

£248

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 £248. The best return flight deal from London to Ottawa found on momondo in the last 72 hours is £380.
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 and Air Canada..
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 £299Free CancellationRating
7.1
9,681 reviews
Search Air Canada flights
United AirlinesPriceFrom £333Free CancellationRating
7.4
8,844 reviews
Search United Airlines flights
KLMPriceFrom £355Free CancellationRating
7.8
1,367 reviews
Search KLM flights
Air FrancePriceFrom £359Free CancellationRating
7.5
1,465 reviews
Search Air France flights
Virgin AtlanticPriceFrom £371Free CancellationRating
7.4
654 reviews
Search Virgin Atlantic flights
Air TransatPriceFrom £405Free CancellationRating
7.8
407 reviews
Search Air Transat flights
LufthansaPriceFrom £440Free CancellationRating
6.8
7,207 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 4 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 9,681 Air Canada reviews on momondo, the average score is 7.1/10. Air Canada flies from London to Ottawa about 4 times each week, with ticket deals ranging from £408 to £588. 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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1 adult
mer. 9/7
mer. 16/7

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