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Cheap flights from Ottawa to London from £191

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 4/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap return flights

United Airlines Logo
06:20 - 05:55YOW-LHR
19h 35m1 stop
United Airlines Logo
09:00 - 23:54LHR-YOW
19h 54m2 stops
£484United Airlines
Find Deal
Fri, 31 Oct - Thu, 6 Nov
United Airlines Logo
10:30 - 06:20YOW-LHR
14h 50m2 stops
United Airlines Logo
06:50 - 16:32LHR-YOW
14h 42m2 stops
£487United Airlines
Find Deal
Thu, 13 Nov - Fri, 28 Nov
United Airlines Logo
17:50 - 10:10YOW-LHR
11h 20m1 stop
United Airlines Logo
06:50 - 16:43LHR-YOW
14h 53m2 stops
£489United Airlines
Find Deal
Tue, 9 Sep - Wed, 24 Sep
Logo
21:00 - 08:35YOW-LHR
6h 35mdirect
Logo
06:50 - 13:51LHR-YOW
12h 01m2 stops
£521
Find Deal
Wed, 1 Oct - Thu, 9 Oct
Logo
05:55 - 10:30YOW-LHR
23h 35m1 stop
Logo
17:15 - 00:22LHR-YOW
12h 07m1 stop
£524
Find Deal
Tue, 23 Sep - Wed, 15 Oct
Air Canada Logo
14:40 - 09:35YOW-LHR
13h 55m1 stop
Air Canada Logo
14:05 - 16:25LHR-YOW
7h 20mdirect
£527Air Canada
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Thu, 9 Oct - Mon, 13 Oct
Lufthansa Logo
18:40 - 09:35YOW-LHR
9h 55m1 stop
Lufthansa Logo
09:30 - 22:04LHR-YOW
17h 34m1 stop
£529Lufthansa
Find Deal
Mon, 6 Oct - Thu, 23 Oct
Lufthansa Logo
21:00 - 08:35YOW-LHR
6h 35mdirect
Lufthansa Logo
12:40 - 15:00LHR-YOW
7h 20mdirect
£530Lufthansa
Find Deal
Wed, 8 Oct - Wed, 15 Oct
Air Canada Logo
07:00 - 21:00YOW-LHR
9h 00m1 stop
Air Canada Logo
09:00 - 17:31LHR-YOW
12h 31m1 stop
£533Air Canada
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Sun, 19 Oct - Sun, 26 Oct
SWISS Logo
13:55 - 07:55YOW-LHR
37h 00m2 stops
SWISS Logo
06:00 - 17:04LHR-YOW
40h 04m2 stops
£540SWISS
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Sun, 5 Oct - Wed, 22 Oct

United Airlines flights from Ottawa to London Heathrow Airport

Our best United Airlines deals on Ottawa to London Heathrow Airport flight tickets
United Airlines
31 Oct
YOW06:20Ottawa
19h 35m
1 stop
LHR05:55London Heathrow
6 Nov
LHR09:00London Heathrow
19h 54m
2 stops
YOW23:54Ottawa
£484
Find similar
United Airlines
13 Nov
YOW10:30Ottawa
14h 50m
2 stops
LHR06:20London Heathrow
28 Nov
LHR06:50London Heathrow
14h 42m
2 stops
YOW16:32Ottawa
£487
Find similar
United Airlines
9 Sept
YOW17:50Ottawa
11h 20m
1 stop
LHR10:10London Heathrow
24 Sept
LHR06:50London Heathrow
14h 53m
2 stops
YOW16:43Ottawa
£489
Find similar

Lufthansa flights from Ottawa to London Heathrow Airport

Our best Lufthansa deals on Ottawa to London Heathrow Airport flight tickets
Lufthansa
6 Oct
YOW18:40Ottawa
9h 55m
1 stop
LHR09:35London Heathrow
23 Oct
LHR09:30London Heathrow
17h 34m
1 stop
YOW22:04Ottawa
£529
Find similar
Lufthansa
8 Oct
YOW21:00Ottawa
6h 35m
LHR08:35London Heathrow
15 Oct
LHR12:40London Heathrow
7h 20m
YOW15:00Ottawa
£530
Find similar
Lufthansa
21 Oct
YOW18:40Ottawa
9h 55m
1 stop
LHR09:35London Heathrow
25 Oct
LHR12:40London Heathrow
7h 20m
YOW15:00Ottawa
£531
Find similar

momondo Fare Finder

 
Customise 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 279,928 searches. Data last updated 1 August 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

Fri 31/10

06:20-05:55

1 stop19h 35m

London Heathrow

Thu 6/11

09:00-23:54

2 stops19h 54m

£484

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 13/11

10:30-06:20

2 stops14h 50m

London Heathrow

Fri 28/11

06:50-16:32

2 stops14h 42m

£487

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 9/9

17:50-10:10

1 stop11h 20m

London Heathrow

Wed 24/9

06:50-16:43

2 stops14h 53m

£489

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 1/10

21:00-08:35

Nonstop6h 35m

London Heathrow

Thu 9/10

06:50-13:51

2 stops12h 01m

£521

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 23/9

05:55-10:30

1 stop23h 35m

London Heathrow

Wed 15/10

17:15-00:22

1 stop12h 07m

£524

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 9/10

14:40-09:35

1 stop13h 55m

London Heathrow

Mon 13/10

14:05-16:25

Nonstop7h 20m

£527

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 6/10

18:40-09:35

1 stop9h 55m

London Heathrow

Thu 23/10

09:30-22:04

1 stop17h 34m

£529

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 8/10

21:00-08:35

Nonstop6h 35m

London Heathrow

Wed 15/10

12:40-15:00

Nonstop7h 20m

£530

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 19/10

07:00-21:00

1 stop9h 00m

London Heathrow

Sun 26/10

09:00-17:31

1 stop12h 31m

£533

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 5/10

13:55-07:55

2 stops37h 00m

London Heathrow

Wed 22/10

06:00-17:04

2 stops40h 04m

£540

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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?

In general, February is the cheapest month to fly from Ottawa to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £529. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from Ottawa averaging around £533.

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

On average, the least expensive day to fly to London Heathrow Airport from Ottawa is on a Monday. momondo users have found tickets for Monday departures for as low as £549. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Sunday is £660.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from Ottawa to London Heathrow Airport in the afternoon for as low as £549. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying at midday when prices are £629 on average. Flights to London Heathrow Airport from Ottawa at midday are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 £587 when searching weeks before you fly. 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 £543 on momondo.

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

There are 2 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 5% 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 August 2025, prices for Ottawa to London Heathrow Airport flights are approximately 40% 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 return 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

£191

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 £191. The best return flight deal from Ottawa to London Heathrow Airport found on momondo in the last 72 hours is £484.
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. Airlines offering direct flights are: Lufthansa and Air Canada..
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  • How far is Ottawa to London Heathrow by plane?

    There are 3317.2 mi between Ottawa and London Heathrow. Flights usually cover this in 6h 35m, depending on flying conditions and air traffic around both airports.

  • 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 are updated daily.

  • 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?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for 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
Air CanadaPriceFrom £487Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights

  • Air Canada Flights From Ottawa to London Heathrow Airport

    Across 4 Air Canada flights from Ottawa to London Heathrow Airport this week, the average price was £822, with the best Air Canada deals starting from £644 round-trip. 9,851 users have rated Air Canada on momondo, with an average score of 7.1/10.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
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Milton Keynes
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Maidstone
Swindon
Canterbury
Gatwick
Stratford-upon-Avon
Ipswich
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Dartford
Guildford
Colchester
Worthing
Hounslow
Swanage
Salisbury

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Ottawa to London. momondo saves you time and could save you money on your trip.

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

Flights from Ottawa to London 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 Ottawa to London?

momondo helps you find the best flight between Ottawa and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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.

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