Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Ottawa to London from £185

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.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Ottawa to London

Cheap return flights

Air Canada Logo
16:05 - 06:30YOW-LHR
9h 25m1 stop
Air Canada Logo
13:25 - 22:18LHR-YOW
12h 53m1 stop
£456Air Canada
Find Deal
Wed, 22 Oct - Wed, 29 Oct
Air Canada Logo
07:00 - 21:00YOW-LHR
9h 00m1 stop
Air Canada Logo
09:00 - 09:42LHR-YOW
28h 42m2 stops
£457Air Canada
Find Deal
Wed, 22 Oct - Wed, 29 Oct
Air Canada Logo
14:50 - 07:10YOW-LHR
12h 20m1 stop
Air Canada Logo
09:00 - 17:43LHR-YOW
13h 43m1 stop
£459Air Canada
Find Deal
Tue, 28 Oct - Tue, 4 Nov
Air Canada Logo
07:00 - 21:00YOW-LHR
9h 00m1 stop
Air Canada Logo
12:40 - 10:25LHR-YOW
26h 45m2 stops
£460Air Canada
Find Deal
Mon, 13 Oct - Mon, 20 Oct
Logo
07:00 - 21:00YOW-LHR
9h 00m1 stop
Logo
14:05 - 16:25LHR-YOW
7h 20mdirect
£462
Find Deal
Mon, 13 Oct - Mon, 20 Oct
Logo
14:50 - 07:10YOW-LHR
11h 20m1 stop
Logo
09:00 - 18:38LHR-YOW
14h 38m2 stops
£466
Find Deal
Tue, 25 Nov - Tue, 2 Dec
Austrian Airlines Logo
19:50 - 06:35YOW-LHR
29h 45m1 stop
Austrian Airlines Logo
19:30 - 00:19LHR-YOW
33h 49m2 stops
£487Austrian Airlines
Find Deal
Sun, 28 Sep - Tue, 7 Oct
Lufthansa Logo
18:55 - 06:30YOW-LHR
6h 35mdirect
Lufthansa Logo
14:05 - 16:25LHR-YOW
7h 20mdirect
£501Lufthansa
Find Deal
Mon, 29 Sep - Thu, 9 Oct
United Airlines Logo
17:50 - 11:25YOW-LHR
12h 35m1 stop
United Airlines Logo
06:50 - 16:43LHR-YOW
14h 53m2 stops
£505United Airlines
Find Deal
Wed, 15 Oct - Wed, 22 Oct
United Airlines Logo
11:55 - 06:55YOW-LHR
14h 00m2 stops
United Airlines Logo
06:50 - 16:43LHR-YOW
14h 53m2 stops
£510United 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
YOW16:05Ottawa
9h 25m
1 stop
LHR06:30London Heathrow
29 Oct
LHR13:25London Heathrow
12h 53m
1 stop
YOW22:18Ottawa
£456
Find similar
Air Canada
22 Oct
YOW07:00Ottawa
9h 00m
1 stop
LHR21:00London Heathrow
29 Oct
LHR09:00London Heathrow
28h 42m
2 stops
YOW09:42Ottawa
£457
Find similar
Air Canada
28 Oct
YOW14:50Ottawa
12h 20m
1 stop
LHR07:10London Heathrow
4 Nov
LHR09:00London Heathrow
13h 43m
1 stop
YOW17:43Ottawa
£459
Find similar

Lufthansa flights from Ottawa to London Heathrow Airport

Our best Lufthansa deals on Ottawa to London Heathrow Airport flight tickets
Lufthansa
29 Sept
YOW18:55Ottawa
6h 35m
LHR06:30London Heathrow
9 Oct
LHR14:05London Heathrow
7h 20m
YOW16:25Ottawa
£501
Find similar
Lufthansa
27 Sept
YOW20:55Ottawa
28h 35m
1 stop
LHR06:30London Heathrow
4 Oct
LHR09:30London Heathrow
12h 49m
1 stop
YOW17:19Ottawa
£542
Find similar
Lufthansa
29 Sept
YOW18:55Ottawa
6h 35m
LHR06:30London Heathrow
11 Oct
LHR12:40London Heathrow
7h 20m
YOW15:00Ottawa
£599
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 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

16:05-06:30

1 stop9h 25m

London Heathrow

Wed 29/10

13:25-22:18

1 stop12h 53m

£456

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 22/10

07:00-21:00

1 stop9h 00m

London Heathrow

Wed 29/10

09:00-09:42

2 stops28h 42m

£457

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 28/10

14:50-07:10

1 stop12h 20m

London Heathrow

Tue 4/11

09:00-17:43

1 stop13h 43m

£459

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 13/10

07:00-21:00

1 stop9h 00m

London Heathrow

Mon 20/10

12:40-10:25

2 stops26h 45m

£460

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 13/10

07:00-21:00

1 stop9h 00m

London Heathrow

Mon 20/10

14:05-16:25

Nonstop7h 20m

£462

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 25/11

14:50-07:10

1 stop11h 20m

London Heathrow

Tue 2/12

09:00-18:38

2 stops14h 38m

£466

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 28/9

19:50-06:35

1 stop29h 45m

London Heathrow

Tue 7/10

19:30-00:19

2 stops33h 49m

£487

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 29/9

18:55-06:30

Nonstop6h 35m

London Heathrow

Thu 9/10

14:05-16:25

Nonstop7h 20m

£501

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 15/10

17:50-11:25

1 stop12h 35m

London Heathrow

Wed 22/10

06:50-16:43

2 stops14h 53m

£505

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 15/10

11:55-06:55

2 stops14h 00m

London Heathrow

Wed 22/10

06:50-16:43

2 stops14h 53m

£510

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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?

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 £514. The month of January is another great option to travel to London Heathrow Airport, with average flight prices from Ottawa averaging around £523.

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 £536. 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 £644.

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 £551. 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 £613 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 £572 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 £529 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?

No. A direct flight is the cheapest option for a flight between Ottawa to London Heathrow Airport.

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 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

£642

Fastest flight time

6h 35m

Direct flights

Tue, Thu, Fri and Sun
The best flight deal from Ottawa to London Heathrow Airport found on momondo in the last 72 hours is £642
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. Airline offering direct flights is Air Canada..
Search flight deals

  • 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 £447Free CancellationRating
7.1
10,000 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 £825, with the best Air Canada deals starting from £606 round-trip. 10,000 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
Eastbourne
Luton
Milton Keynes
Maidstone
Gatwick
Slough
Northampton
Swindon
Canterbury
Stratford-upon-Avon
Southend-on-Sea
Ipswich
Ilford
Guildford
Swanage
Poole
Colchester
Worthing
Salisbury
Chelmsford

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.

An easier way to manage your London Heathrow Airport trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Wed 15/10
Wed 22/10
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London