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Heathrow

$253+ Cheap flights from Ottawa (YOW) to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/15. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in February or January, booked 20 days in advance, depart on a Thursday or Tuesday and return on a Wednesday

Cheap flight deals from Ottawa to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Ottawa (YOW) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$643
(Air Canada)

One-way from

$253
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$758

Good round-trip deal

$703 or less

Good one-way deal

$766 or less
From Ottawa to London Heathrow
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One-way flight from Ottawa to London Heathrow
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Highest demand for flights based on searches. 6% potential increase in price ($50 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Ottawa to London Heathrow.
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Price to beat on a one-way flight from Ottawa to London Heathrow.
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Find flight deals from Ottawa to Heathrow

Cheapest flights from Ottawa to Heathrow
Explore the most affordable flight options available from Ottawa to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Air Canada deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:10 pmYOW - LHR
1 stop21h 50mAir Canada
Mon 9/2212:40 pmLHR - YOW
1 stop15h 24mAir Canada
Deal found 9/10$643
This Air Canada deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/167:00 amYOW - LHR
1 stop9h 00mAir Canada
Wed 10/291:25 pmLHR - YOW
1 stop12h 53mAir Canada
Deal found 9/10$679
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1610:25 amYOW - LHR
2 stops14h 30mUnited Airlines
Tue 9/306:50 amLHR - YOW
2 stops14h 53mUnited Airlines
Deal found 9/11$684
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/155:50 pmYOW - LHR
1 stop11h 20mUnited Airlines
Mon 9/227:45 amLHR - YOW
2 stops13h 58mUnited Airlines
Deal found 9/10$685
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/711:55 amYOW - LHR
2 stops14h 20mUnited Airlines
Tue 10/146:50 amLHR - YOW
2 stops14h 53mUnited Airlines
Deal found 9/10$690
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1511:55 amYOW - LHR
2 stops14h 00mUnited Airlines
Wed 11/56:50 amLHR - YOW
2 stops14h 42mUnited Airlines
Deal found 9/11$691
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/82:48 pmYOW - LHR
1 stop10h 57mUnited Airlines
Tue 10/219:30 amLHR - YOW
2 stops17h 05mUnited Airlines
Deal found 9/11$694
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/165:50 pmYOW - LHR
1 stop12h 35mUnited Airlines
Tue 9/2312:15 pmLHR - YOW
1 stop11h 37mUnited Airlines
Deal found 9/10$696
This United Airlines deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/267:30 pmYOW - LHR
1 stop31h 10mUnited Airlines
Sun 11/211:05 amLHR - YOW
2 stops34h 27mUnited Airlines
Deal found 9/11$698

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ottawa to Heathrow 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Ottawa to London Heathrow Airport that are best for you.

Fly from

Ottawa

Fly to

Heathrow

Route

Depart

Return

Price

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 10/16

7:00 am-9:00 pm

1 stop9h 00m

London Heathrow

Wed 10/29

1:25 pm-11:08 pm

2 stops13h 43m

$686

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 10/27

12:05 pm-6:20 am

2 stops14h 15m

London Heathrow

Mon 11/3

6:50 am-4:32 pm

2 stops14h 42m

$690

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 10/13

12:30 pm-5:55 am

1 stop12h 25m

London Heathrow

Mon 3/2

3:10 pm-9:56 pm

1 stop11h 46m

$696

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 10/26

7:30 pm-6:40 am

1 stop31h 10m

London Heathrow

Sun 11/2

11:05 am-4:32 pm

2 stops34h 27m

$698

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 10/8

11:55 am-6:45 am

2 stops13h 50m

London Heathrow

Tue 10/21

8:00 am-9:35 pm

2 stops18h 35m

$701

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 9/28

7:00 am-9:00 pm

1 stop9h 00m

London Heathrow

Sat 10/4

9:30 am-1:53 pm

1 stop9h 23m

$716

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 2/26

5:57 pm-10:25 am

1 stop11h 28m

London Heathrow

Mon 3/30

6:50 am-4:15 pm

2 stops14h 25m

$720

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 10/16

10:25 am-5:55 am

2 stops14h 30m

London Heathrow

Wed 10/29

9:10 am-9:18 pm

2 stops16h 08m

$732

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 1/13

10:30 am-6:20 am

2 stops14h 50m

London Heathrow

Fri 2/13

10:25 am-9:18 pm

2 stops15h 53m

$737

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 10/14

11:55 am-6:45 am

2 stops13h 50m

London Heathrow

Thu 3/5

10:25 am-9:18 pm

2 stops15h 53m

$745

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 22 results
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Best time to book a flight from Ottawa to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Ottawa with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ottawa to London Heathrow Airport

How far ahead should I book a flight from Ottawa to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Ottawa to Heathrow. Price data was last updated on August 29, 2025.

Booking 20 days in advance of your planned departure date is, on average, the best time to get cheap flights from Ottawa to London Heathrow Airport. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Ottawa to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of $661). Flying from Ottawa to London Heathrow Airport in June is currently the most expensive (average of $1,098). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YOW to LHR?

Find hourly flight availability from Ottawa to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 5% on flights from Ottawa to London Heathrow Airport by exploring options for tickets in the evening.

What is the cheapest day to fly from Ottawa to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Ottawa to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Ottawa to London Heathrow Airport flight should consider departing on Tuesday mornings when fares are most often at their lowest. Wednesday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from Ottawa to London Heathrow Airport?

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated September 11, 2025.
See what other customers who have flown with Air France, Air Canada, and Lufthansa from Ottawa to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air France
7.4
Good
1,469 reviews

Overall

7.4

Comfort

7.4

Boarding

7.4

Crew

8.2

Food

7.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
Air France
7.4
Good
1,469 reviews
Air France
7.4
Good
1,469 reviews

Overall

7.4

Comfort

7.4

Boarding

7.4

Crew

8.2

Food

7.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
Air Canada
7.1
Good
10,000 reviews
Air France
7.4
Good
1,469 reviews

Overall

7.4

Comfort

7.4

Boarding

7.4

Crew

8.2

Food

7.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.
Lufthansa
6.8
Okay
7,409 reviews
Air France
7.4
Good
1,469 reviews

Overall

7.4

Comfort

7.4

Boarding

7.4

Crew

8.2

Food

7.0

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

SYLVIA,Apr 2025

TLV - CDG

A newer plane. The flight from TelAviv to Paris was on a new aircraft, wider seat. ,more privacy. Nice toilets. The flight from Paris to Santiago Chile was on a very old aircraft. Awful toilets, outmoded sits etc.

Related info for your journey

Find useful and relevant information for your journey from Ottawa to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Ottawa to London Heathrow?

    Ottawa (YOW) is the airport you will fly out of if you book a flight from Ottawa to London Heathrow. You should not have trouble finding flights to London Heathrow from Ottawa; the airport handles an average of 3 outbound flights to London Heathrow per day. You should also have plenty of airline options to choose from since 3 airlines have flights from the Ottawa airport to London Heathrow. It is only a 6.6 mi journey to Ottawa (YOW) from Ottawa’s city center.

  • How long is the flight from Ottawa to London Heathrow Airport?

    Air Canada and United Airlines can get you from Ottawa to London Heathrow Airport in just under 9h. Your travel time can differ by up to 5h 15m. The distance between Ottawa and London Heathrow Airport is about 3320 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Ottawa to London Heathrow Airport round-trip?

    According to our current data, Air France ($454), Lufthansa ($699), and Air Canada ($702) offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 41% less than the average price by searching for these airlines.

  • What are the most reliable airlines from Ottawa to London Heathrow Airport?

    Consider Air Canada (68%), Aegean Airlines (68%) or Austrian Airlines (68%) when booking your flight. These represent the most reliable airlines when flying from Ottawa to London Heathrow Airport.

  • What are the cheapest flights from Ottawa to London Heathrow Airport?

    The cheapest flight price from Ottawa to London Heathrow Airport is $628. On average you can expect to pay $1,412. The most popular route, (Ottawa - London Heathrow), can usually be booked for $589.

  • Can I find deals for flights from Ottawa to Heathrow that include hotel bookings?

    Yes. In addition to deals on Ottawa to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ottawa to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ottawa to Heathrow.

  • Can I find deals for business class flights from Ottawa to Heathrow?

    Yes. Cheapflights offers flight deals from Ottawa to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ottawa to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of $661). Flying from Ottawa to London Heathrow Airport in June is currently the most expensive (average of $1,098). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Southend-on-Sea
Harrow
Canterbury
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Wembley
Folkestone

Browse thousands of different options on Cheapflights for your next trip

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Top 3 airlines flying from Ottawa to Heathrow

Discover the top 3 airlines that operate flights from Ottawa to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$454Average$598FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$699Average$780FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$702Average$796FlexibilityNo cancel feeOn-time67%

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