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$321+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 9 days in advance, depart on a Tuesday or Thursday 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 June 12, 2025.

Round-trip from

$678
(United Airlines)

One-way from

$321
(Mytrip)

Popular in

December

Cheapest in

February

Average price

$807

Good round-trip deal

$785 or less

Good one-way deal

$696 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 ($55 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($24 potential savings vs. average RT price).
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Average for round-trip flights in June 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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/10. 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.
Sat 10/1111:55 amYOW - LHR
2 stops14h 20mUnited Airlines
Sat 10/1811:05 amLHR - YOW
2 stops15h 04mUnited Airlines
Deal found 6/10$678
This Austrian Airlines deal was found by Cheapflights users on 6/11. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:50 pmYOW - LHR
1 stop11h 00mAustrian Airlines
Thu 9/2510:25 amLHR - YOW
2 stops42h 54mAustrian Airlines
Deal found 6/11$749
This Lufthansa deal was found by Cheapflights users on 6/12. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/109:00 pmYOW - LHR
Nonstop6h 35mLufthansa
Wed 9/2412:40 pmLHR - YOW
Nonstop7h 20mLufthansa
Deal found 6/12$751
This Air Canada deal was found by Cheapflights users on 6/12. 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.
Wed 9/1011:05 amYOW - LHR
1 stop14h 25mAir Canada
Wed 9/249:30 amLHR - YOW
1 stop9h 21mAir Canada
Deal found 6/12$752
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/203:55 pmYOW - LHR
2 stops24h 50mSWISS
Thu 7/246:00 amLHR - YOW
2 stops22h 08mSWISS
Deal found 6/10$813
This Gurufare deal was found by Cheapflights users on 6/9. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/231:55 pmYOW - LHR
2 stops13h 05mAer Lingus
Mon 9/297:40 amLHR - YOW
2 stops18h 29mAer Lingus
Deal found 6/9$825
This KLM deal was found by Cheapflights users on 6/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/165:15 pmYOW - LHR
2 stops12h 30mKLM
Tue 10/76:30 amLHR - YOW
2 stops13h 35mKLM
Deal found 6/11$835
This Air France deal was found by Cheapflights users on 6/11. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/245:15 pmYOW - LHR
1 stop18h 20mAir France
Mon 8/183:20 pmLHR - YOW
2 stops14h 02mAir France
Deal found 6/11$889
This KLM deal was found by Cheapflights users on 6/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/255:15 pmYOW - LHR
2 stops12h 30mMultiple Airlines
Thu 10/26:15 amLHR - YOW
1 stop13h 50mMultiple Airlines
Deal found 6/11$917
This Delta deal was found by Cheapflights users on 6/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/135:55 amYOW - LHR
2 stops19h 30mDelta
Wed 6/189:35 amLHR - YOW
2 stops19h 47mDelta
Deal found 6/10$955

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 June 12, 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

Sat 10/11

11:55 am-7:15 am

2 stops14h 20m

London Heathrow

Sat 10/18

11:05 am-9:09 pm

2 stops15h 04m

$678

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 9/26

5:15 pm-8:00 am

1 stop9h 45m

London Heathrow

Sun 10/12

9:00 am-3:05 pm

1 stop11h 05m

$714

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 9/6

7:50 pm-11:50 am

1 stop11h 00m

London Heathrow

Fri 9/26

6:00 am-12:19 am

2 stops23h 19m

$749

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 9/10

9:00 pm-8:35 am

Nonstop6h 35m

London Heathrow

Wed 9/24

12:40 pm-3:00 pm

Nonstop7h 20m

$751

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 9/10

11:05 am-6:30 am

1 stop14h 25m

London Heathrow

Wed 9/24

9:30 am-1:51 pm

1 stop9h 21m

$752

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 7/20

3:55 pm-9:45 pm

2 stops24h 50m

London Heathrow

Thu 7/24

6:00 am-11:08 pm

2 stops22h 08m

$813

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 9/23

1:55 pm-8:00 am

2 stops13h 05m

London Heathrow

Mon 9/29

7:40 am-9:09 pm

2 stops18h 29m

$825

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 9/16

5:15 pm-10:45 am

2 stops12h 30m

London Heathrow

Tue 10/7

6:30 am-3:05 pm

2 stops13h 35m

$835

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 7/24

5:15 pm-4:35 pm

1 stop18h 20m

London Heathrow

Mon 8/18

3:20 pm-12:22 am

2 stops14h 02m

$889

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 9/25

5:15 pm-10:45 am

2 stops12h 30m

London Heathrow

Thu 10/2

6:15 am-3:05 pm

1 stop13h 50m

$917

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 17 results
1
2

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 June 9, 2025.

Booking 9 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 $1,108). 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 June 12, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 3% 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.

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 June 12, 2025.
See what other customers who have flown with KLM, Austrian Airlines and Air France from Ottawa to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,358 reviews

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
KLM
7.8
Good
1,358 reviews
KLM
7.8
Good
1,358 reviews

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Austrian Airlines
7.6
Good
802 reviews
KLM
7.8
Good
1,358 reviews

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
Air France
7.5
Good
1,463 reviews
KLM
7.8
Good
1,358 reviews

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
SWISS
7.5
Good
1,623 reviews
KLM
7.8
Good
1,358 reviews

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.
United Airlines
7.4
Good
8,790 reviews
KLM
7.8
Good
1,358 reviews

Boarding

7.8

Food

7.2

Crew

8.4

Comfort

7.7

Overall

7.8

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

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 0 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.

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

    According to our current data, United Airlines ($678), Virgin Atlantic ($714), and Lufthansa ($743) offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 12% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Ottawa to London Heathrow Airport one-way?

    $356 is the cheapest one-way deal found within the past few days, from WestJet. You may also be able to find cheap deals on Air Canada and Lufthansa, with prices starting from $364 and $365, respectively.

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

    Consider Air Canada (83%), Aegean Airlines (83%) or Austrian Airlines (83%) 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 $691. On average you can expect to pay $836. The most popular route, (Ottawa - London Heathrow), can usually be booked for $652.

  • 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 $1,108). 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 Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
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Gatwick
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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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$454Average$598FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$619Average$780FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$702Average$801FlexibilityNo cancel feeOn-time67%

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