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Cheap flights from Ottawa to London from $261

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 10/17. 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 round-trip flights

Air Canada Logo
2:40 pm - 9:35 amYOW-LHR
13h 55m1 stop
Air Canada Logo
12:40 pm - 3:00 pmLHR-YOW
7h 20mnonstop
$642Air Canada
Find Deal
Wed, Oct 15 - Wed, Oct 22
Air Canada Logo
11:05 am - 6:30 amYOW-LHR
14h 25m1 stop
Air Canada Logo
1:25 pm - 10:18 pmLHR-YOW
12h 53m1 stop
$644Air Canada
Find Deal
Wed, Oct 8 - Wed, Oct 29
Air Canada Logo
2:05 pm - 7:10 amYOW-LHR
12h 05m2 stops
Air Canada Logo
9:00 am - 2:21 pmLHR-YOW
10h 21m1 stop
$648Air Canada
Find Deal
Mon, Feb 16 - Mon, Feb 23
Logo
6:20 pm - 7:10 amYOW-LHR
8h 50m1 stop
Logo
9:00 am - 7:18 pmLHR-YOW
15h 18m2 stops
$651
Find Deal
Wed, Oct 29 - Wed, Nov 5
Logo
5:55 pm - 10:00 amYOW-LHR
11h 05m1 stop
Logo
6:50 am - 1:51 pmLHR-YOW
12h 01m2 stops
$659
Find Deal
Tue, Oct 14 - Tue, Oct 21
Lufthansa Logo
6:55 pm - 6:30 amYOW-LHR
6h 35mnonstop
Lufthansa Logo
2:05 pm - 4:25 pmLHR-YOW
7h 20mnonstop
$680Lufthansa
Find Deal
Mon, Sep 29 - Thu, Oct 9
United Airlines Logo
5:50 pm - 11:25 amYOW-LHR
12h 35m1 stop
United Airlines Logo
6:50 am - 4:43 pmLHR-YOW
14h 53m2 stops
$685United Airlines
Find Deal
Wed, Oct 15 - Wed, Oct 22
United Airlines Logo
11:55 am - 6:55 amYOW-LHR
14h 00m2 stops
United Airlines Logo
6:50 am - 4:43 pmLHR-YOW
14h 53m2 stops
$692United Airlines
Find Deal
Wed, Oct 15 - Wed, Oct 22
Virgin Atlantic Logo
5:20 pm - 8:00 amYOW-LHR
9h 40m1 stop
Virgin Atlantic Logo
8:55 am - 3:10 pmLHR-YOW
11h 15m1 stop
$724Virgin Atlantic
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Wed, Dec 10 - Thu, Dec 18
Lufthansa Logo
8:55 pm - 6:30 amYOW-LHR
28h 35m1 stop
Lufthansa Logo
9:30 am - 5:19 pmLHR-YOW
12h 49m1 stop
$735Lufthansa
Find Deal
Sat, Sep 27 - Sat, Oct 4

Air Canada flights from Ottawa to London Heathrow Airport

Our best Air Canada deals on Ottawa to London Heathrow Airport flight tickets
Air Canada
Oct 15
YOW2:40 pmOttawa
13h 55m
1 stop
LHR9:35 amLondon Heathrow
Oct 22
LHR12:40 pmLondon Heathrow
7h 20m
YOW3:00 pmOttawa
$642
Find similar
Air Canada
Oct 8
YOW11:05 amOttawa
14h 25m
1 stop
LHR6:30 amLondon Heathrow
Oct 29
LHR1:25 pmLondon Heathrow
12h 53m
1 stop
YOW10:18 pmOttawa
$644
Find similar
Air Canada
Feb 16
YOW2:05 pmOttawa
12h 05m
2 stops
LHR7:10 amLondon Heathrow
Feb 23
LHR9:00 amLondon Heathrow
10h 21m
1 stop
YOW2:21 pmOttawa
$648
Find similar

Lufthansa flights from Ottawa to London Heathrow Airport

Our best Lufthansa deals on Ottawa to London Heathrow Airport flight tickets
Lufthansa
Sep 29
YOW6:55 pmOttawa
6h 35m
LHR6:30 amLondon Heathrow
Oct 9
LHR2:05 pmLondon Heathrow
7h 20m
YOW4:25 pmOttawa
$680
Find similar
Lufthansa
Sep 27
YOW8:55 pmOttawa
28h 35m
1 stop
LHR6:30 amLondon Heathrow
Oct 4
LHR9:30 amLondon Heathrow
12h 49m
1 stop
YOW5:19 pmOttawa
$735
Find similar
Lufthansa
Oct 1
YOW9:00 pmOttawa
6h 35m
LHR8:35 amLondon Heathrow
Oct 15
LHR12:40 pmLondon Heathrow
7h 20m
YOW3:00 pmOttawa
$771
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 832,500 searches. Data last updated September 16, 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 10/15

2:40 pm-9:35 am

1 stop13h 55m

London Heathrow

Wed 10/22

12:40 pm-3:00 pm

Nonstop7h 20m

$642

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 10/8

11:05 am-6:30 am

1 stop14h 25m

London Heathrow

Wed 10/29

1:25 pm-10:18 pm

1 stop12h 53m

$644

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 2/16

2:05 pm-7:10 am

2 stops12h 05m

London Heathrow

Mon 2/23

9:00 am-2:21 pm

1 stop10h 21m

$648

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 10/29

6:20 pm-7:10 am

1 stop8h 50m

London Heathrow

Wed 11/5

9:00 am-7:18 pm

2 stops15h 18m

$651

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 10/14

5:55 pm-10:00 am

1 stop11h 05m

London Heathrow

Tue 10/21

6:50 am-1:51 pm

2 stops12h 01m

$659

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 9/29

6:55 pm-6:30 am

Nonstop6h 35m

London Heathrow

Thu 10/9

2:05 pm-4:25 pm

Nonstop7h 20m

$680

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 10/15

5:50 pm-11:25 am

1 stop12h 35m

London Heathrow

Wed 10/22

6:50 am-4:43 pm

2 stops14h 53m

$685

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 10/15

11:55 am-6:55 am

2 stops14h 00m

London Heathrow

Wed 10/22

6:50 am-4:43 pm

2 stops14h 53m

$692

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 12/10

5:20 pm-8:00 am

1 stop9h 40m

London Heathrow

Thu 12/18

8:55 am-3:10 pm

1 stop11h 15m

$724

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 9/27

8:55 pm-6:30 am

1 stop28h 35m

London Heathrow

Sat 10/4

9:30 am-5:19 pm

1 stop12h 49m

$735

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 $697. If you’re not able to fly to London Heathrow Airport in February, then January is your next best option. Flight prices from Ottawa to London Heathrow Airport during January average around $710.

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

Our data shows that Saturday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $831. The most expensive day to fly to London Heathrow Airport is Monday, with ticket prices averaging around $954.

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 evening. momondo users have found flights departing from Ottawa to London Heathrow Airport in the evening for as low as $855. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $891.

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 $776 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 $717 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 28% 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

$689

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 $689. The best round-trip flight deal from Ottawa to London Heathrow Airport found on momondo in the last 72 hours is $703.
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?

    Ottawa and London Heathrow are 3317.2 mi apart from one another. By plane, this route typically takes 6h 35m.

  • 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?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, 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 FrancePriceFrom $454Free CancellationRating
7.4
1,469 reviews
Search Air France flights
LufthansaPriceFrom $699Free CancellationRating
6.8
7,407 reviews
Search Lufthansa flights
Air CanadaPriceFrom $702Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights

  • Air Canada Flights From Ottawa to London Heathrow Airport

    Across 2 Air Canada flights from Ottawa to London Heathrow Airport this week, the average price was $797, with the best Air Canada deals starting from $702 round-trip. 10,000 users have rated Air Canada on momondo, with an average score of 7.1/10.

  • Lufthansa Flights From Ottawa to London Heathrow Airport

    Lufthansa is also a popular choice for this route. Lufthansa flight deals for Ottawa to London Heathrow Airport start from as low as $699 round-trip, depending on your selected dates, with average Lufthansa deals seen on momondo around $780. Lufthansa operates 1 flight to London Heathrow Airport from Ottawa in an average week. Users have rated it 6.8/10 across 7,407 reviews.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Dover
Luton
Slough
Milton Keynes
Hayes
Guildford
Dartford
Crawley
Stansted
Chelmsford
Salisbury
Brentwood
Ilford
Folkestone
Colchester
Swindon
Stratford-upon-Avon
Watford

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to London from Ottawa.

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

Yes. All flights to London from Ottawa on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to London from Ottawa. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from Ottawa to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.

An easier way to manage your London Heathrow Airport trip

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