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Cheap flights from Ottawa to London from C$ 347

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ottawa to London departing on 25/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Cheap round-trip flights

Air Canada Logo
4:05 p.m. - 6:30 a.m.YOW-LHR
9h 25m1 stop
Air Canada Logo
1:25 p.m. - 10:18 p.m.LHR-YOW
12h 53m1 stop
C$ 857Air Canada
Find Deal
Wed, 22 Oct - Wed, 29 Oct
Air Canada Logo
7:00 a.m. - 9:00 p.m.YOW-LHR
9h 00m1 stop
Air Canada Logo
9:00 a.m. - 9:42 a.m.LHR-YOW
28h 42m2 stops
C$ 858Air Canada
Find Deal
Wed, 22 Oct - Wed, 29 Oct
Air Canada Logo
2:50 p.m. - 7:10 a.m.YOW-LHR
12h 20m1 stop
Air Canada Logo
9:00 a.m. - 5:43 p.m.LHR-YOW
13h 43m1 stop
C$ 861Air Canada
Find Deal
Tue, 28 Oct - Tue, 4 Nov
Air Canada Logo
7:00 a.m. - 9:00 p.m.YOW-LHR
9h 00m1 stop
Air Canada Logo
12:40 p.m. - 10:25 a.m.LHR-YOW
26h 45m2 stops
C$ 864Air Canada
Find Deal
Mon, 13 Oct - Mon, 20 Oct
Logo
7:00 a.m. - 9:00 p.m.YOW-LHR
9h 00m1 stop
Logo
2:05 p.m. - 4:25 p.m.LHR-YOW
7h 20mdirect
C$ 866
Find Deal
Mon, 13 Oct - Mon, 20 Oct
Logo
2:50 p.m. - 7:10 a.m.YOW-LHR
11h 20m1 stop
Logo
9:00 a.m. - 6:38 p.m.LHR-YOW
14h 38m2 stops
C$ 875
Find Deal
Tue, 25 Nov - Tue, 2 Dec
Austrian Airlines Logo
7:50 p.m. - 6:35 a.m.YOW-LHR
29h 45m1 stop
Austrian Airlines Logo
7:30 p.m. - 12:19 a.m.LHR-YOW
33h 49m2 stops
C$ 915Austrian Airlines
Find Deal
Sun, 28 Sep - Tue, 7 Oct
Lufthansa Logo
6:55 p.m. - 6:30 a.m.YOW-LHR
6h 35mdirect
Lufthansa Logo
2:05 p.m. - 4:25 p.m.LHR-YOW
7h 20mdirect
C$ 941Lufthansa
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Mon, 29 Sep - Thu, 9 Oct
United Airlines Logo
5:50 p.m. - 11:25 a.m.YOW-LHR
12h 35m1 stop
United Airlines Logo
6:50 a.m. - 4:43 p.m.LHR-YOW
14h 53m2 stops
C$ 948United Airlines
Find Deal
Wed, 15 Oct - Wed, 22 Oct
United Airlines Logo
11:55 a.m. - 6:55 a.m.YOW-LHR
14h 00m2 stops
United Airlines Logo
6:50 a.m. - 4:43 p.m.LHR-YOW
14h 53m2 stops
C$ 958United Airlines
Find Deal
Wed, 15 Oct - Wed, 22 Oct

Air Canada flights from Ottawa to London Heathrow Airport

Our best Air Canada deals on Ottawa to London Heathrow Airport flight tickets
Air Canada
22 Oct
YOW4:05 p.m.Ottawa
9h 25m
1 stop
LHR6:30 a.m.London Heathrow
29 Oct
LHR1:25 p.m.London Heathrow
12h 53m
1 stop
YOW10:18 p.m.Ottawa
C$ 857
Find similar
Air Canada
22 Oct
YOW7:00 a.m.Ottawa
9h 00m
1 stop
LHR9:00 p.m.London Heathrow
29 Oct
LHR9:00 a.m.London Heathrow
28h 42m
2 stops
YOW9:42 a.m.Ottawa
C$ 858
Find similar
Air Canada
28 Oct
YOW2:50 p.m.Ottawa
12h 20m
1 stop
LHR7:10 a.m.London Heathrow
4 Nov
LHR9:00 a.m.London Heathrow
13h 43m
1 stop
YOW5:43 p.m.Ottawa
C$ 861
Find similar

Lufthansa flights from Ottawa to London Heathrow Airport

Our best Lufthansa deals on Ottawa to London Heathrow Airport flight tickets
Lufthansa
29 Sep
YOW6:55 p.m.Ottawa
6h 35m
LHR6:30 a.m.London Heathrow
9 Oct
LHR2:05 p.m.London Heathrow
7h 20m
YOW4:25 p.m.Ottawa
C$ 941
Find similar
Lufthansa
27 Sep
YOW8:55 p.m.Ottawa
28h 35m
1 stop
LHR6:30 a.m.London Heathrow
4 Oct
LHR9:30 a.m.London Heathrow
12h 49m
1 stop
YOW5:19 p.m.Ottawa
C$ 1,017
Find similar
Lufthansa
29 Sep
YOW6:55 p.m.Ottawa
6h 35m
LHR6:30 a.m.London Heathrow
11 Oct
LHR12:40 p.m.London Heathrow
7h 20m
YOW3:00 p.m.Ottawa
C$ 1,125
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Ottawa to London Heathrow Airport 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, momondo users made 96,600 searches. Data last updated 15 September 2025.
Use the filters below to find and compare flights from Ottawa to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 22/10

4:05 p.m.-6:30 a.m.

1 stop9h 25m

London Heathrow

Wed 29/10

1:25 p.m.-10:18 p.m.

1 stop12h 53m

C$ 857

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 22/10

7:00 a.m.-9:00 p.m.

1 stop9h 00m

London Heathrow

Wed 29/10

9:00 a.m.-9:42 a.m.

2 stops28h 42m

C$ 858

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 28/10

2:50 p.m.-7:10 a.m.

1 stop12h 20m

London Heathrow

Tue 4/11

9:00 a.m.-5:43 p.m.

1 stop13h 43m

C$ 861

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 13/10

7:00 a.m.-9:00 p.m.

1 stop9h 00m

London Heathrow

Mon 20/10

12:40 p.m.-10:25 a.m.

2 stops26h 45m

C$ 864

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 13/10

7:00 a.m.-9:00 p.m.

1 stop9h 00m

London Heathrow

Mon 20/10

2:05 p.m.-4:25 p.m.

Nonstop7h 20m

C$ 866

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 25/11

2:50 p.m.-7:10 a.m.

1 stop11h 20m

London Heathrow

Tue 2/12

9:00 a.m.-6:38 p.m.

2 stops14h 38m

C$ 875

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 28/9

7:50 p.m.-6:35 a.m.

1 stop29h 45m

London Heathrow

Tue 7/10

7:30 p.m.-12:19 a.m.

2 stops33h 49m

C$ 915

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 29/9

6:55 p.m.-6:30 a.m.

Nonstop6h 35m

London Heathrow

Thu 9/10

2:05 p.m.-4:25 p.m.

Nonstop7h 20m

C$ 941

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 15/10

5:50 p.m.-11:25 a.m.

1 stop12h 35m

London Heathrow

Wed 22/10

6:50 a.m.-4:43 p.m.

2 stops14h 53m

C$ 948

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 15/10

11:55 a.m.-6:55 a.m.

2 stops14h 00m

London Heathrow

Wed 22/10

6:50 a.m.-4:43 p.m.

2 stops14h 53m

C$ 958

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from Ottawa to London Heathrow Airport

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 London Heathrow Airport?

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Ottawa, with most prices found around C$ 965. If you aren’t able to travel to London Heathrow Airport during the month of February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of C$ 983.

What is the cheapest day to depart on your flight to London Heathrow Airport?

According to our data, Friday is the cheapest day to fly to London Heathrow Airport from Ottawa. The lowest ticket price found for a Friday departure recently was C$ 1,083. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from Ottawa to London Heathrow Airport for around C$ 1,289.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

Our data shows that the cheapest Ottawa to London Heathrow Airport flights are usually those with departure times in the morning. Our users have found flights to London Heathrow Airport in the morning for as low as C$ 1,100. In the afternoon is when there is more demand to fly to London Heathrow Airport, so prices are often more expensive at around C$ 1,120 per ticket.

What is the cheapest Ottawa to London Heathrow flight route?

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

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from Ottawa when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around C$ 1,075 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Ottawa for as low as C$ 992 on momondo.

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

There are 3 cabin classes available to choose from on Ottawa to London Heathrow 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 Ottawa to London Heathrow Airport flights?

You could potentially save up to 22% on your flight if you consider stops on a Ottawa to London Heathrow Airport flight.

How have Ottawa to London Heathrow Airport flight prices changed over time?

As of September 2025, prices for Ottawa to London Heathrow Airport flights are approximately 20% cheaper when compared to flights at the same time last year.

When to book flights from Ottawa to London Heathrow Airport

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

Cheap Ottawa to London Heathrow Airport (YOW to LHR) flight deals and tips

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

Best price found

C$ 1,187

Fastest flight time

6h 35m

Direct flights

Tue, Thu, Fri and Sun
The best one-way flight to London Heathrow Airport from Ottawa in the past 72 hours is C$ 1,187. The best round-trip flight deal from Ottawa to London Heathrow Airport found on momondo in the last 72 hours is C$ 953.
The fastest flight from Ottawa to London Heathrow Airport takes 6h 35m
Direct flights go from Ottawa to London Heathrow Airport on Tuesday, Thursday, Friday and Sunday. There are no airlines offering direct flights.
Search flight deals

  • How far is Ottawa to London Heathrow by plane?

    There are 5338.5 km between Ottawa and London Heathrow. 6h 35m is a normal flight duration for this route.

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

    Prices for flights from Ottawa Airport to London Heathrow Airport were last updated today.

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

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

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

    The travel and health documents you'll need for your trip to London Heathrow 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 London Heathrow 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 Ottawa to London Heathrow Airport?

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

Best airlines flying from Ottawa to London Heathrow Airport

Compare and see reviews for airlines that fly from Ottawa to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
Virgin AtlanticPriceFrom C$ 734Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
Air FrancePriceFrom C$ 734Free CancellationRating
7.4
1,469 reviews
Search Air France flights
KLMPriceFrom C$ 831Free CancellationRating
7.8
1,385 reviews
Search KLM flights
United AirlinesPriceFrom C$ 892Free CancellationRating
7.4
8,929 reviews
Search United Airlines flights
Air CanadaPriceFrom C$ 902Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
LufthansaPriceFrom C$ 959Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights

  • United Airlines Flights From Ottawa to London Heathrow Airport

    United Airlines operates around 4 flights from Ottawa to London Heathrow Airport every week. The average price of these flights found in the last 72 hours has been C$ 803, but momondo users have found United Airlines deals from Ottawa to London Heathrow Airport from as low as C$ 645 round-trip. United Airlines has been scored 7.4/10 in 8,929 reviews.

  • Air Canada Flights From Ottawa to London Heathrow Airport

    Air Canada is also a popular choice for this route. Air Canada flight deals for Ottawa to London Heathrow Airport start from as low as C$ 652 round-trip, depending on your selected dates, with average Air Canada deals seen on momondo around C$ 760. Air Canada operates 4 flights to London Heathrow Airport from Ottawa in an average week. Users have rated it 7.1/10 across 10,000 reviews.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Hounslow
Ipswich
Poole
Gatwick
Dartford
Crawley
Ilford
Wembley
Swindon
Maidstone
Chelmsford
Wokingham
Slough
Canterbury
Stratford-upon-Avon
Feltham
Hayes
Uxbridge
Waterlooville
Newport

Why use momondo?

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

It is quick and easy to find Ottawa to London flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to London that suits you.

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

Yes. momondo allows you to filter the results for Ottawa to London flights to just show those with flexible booking policies.

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

Once all potential Ottawa to London 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 Ottawa to London right now. Can momondo alert me if prices change?

If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from Ottawa and alert you when they change.

An easier way to manage your London Heathrow Airport trip

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