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Heathrow

$319+ 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 6/14. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
Apr 20 — Apr 271
Sun 4/20
Sun 4/27
1 adult, Economy
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Find cheap flights from Ottawa to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

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3. Compare prices and book

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Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in February or January, booked 49 days in advance, depart on a Wednesday 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 April 15, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$648
(SWISS)

One-way from

$319
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$716

Good round-trip deal

$717 or less

Good one-way deal

$701 or less
Provider with most accurate pricing for Ottawa-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Ottawa-London Heathrow flights.
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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. 4% potential increase in price ($38 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 April 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 April 15, 2025.

This SWISS deal was found by Cheapflights users on 4/15. 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.
Tue 10/73:55 pmYOW - LHR
2 stops19h 30mSWISS
Wed 10/226:00 amLHR - YOW
2 stops18h 04mSWISS
Deal found 4/15$648
This United Airlines deal was found by Cheapflights users on 4/15. 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.
Thu 10/910:25 amYOW - LHR
1 stop19h 15mUnited Airlines
Fri 10/318:55 amLHR - YOW
2 stops18h 48mUnited Airlines
Deal found 4/15$656
This KLM deal was found by Cheapflights users on 4/15. 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 10/95:15 pmYOW - LHR
2 stops12h 30mMultiple Airlines
Mon 10/206:15 amLHR - YOW
1 stop13h 50mMultiple Airlines
Deal found 4/15$678
This Air Canada deal was found by Cheapflights users on 4/15. 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 5/79:00 pmYOW - LHR
Nonstop6h 35mAir Canada
Thu 5/152:05 pmLHR - YOW
Nonstop7h 30mAir Canada
Deal found 4/15$679
This Lufthansa deal was found by Cheapflights users on 4/15. 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.
Tue 10/76:40 pmYOW - LHR
1 stop10h 20mLufthansa
Wed 10/229:30 amLHR - YOW
1 stop9h 15mLufthansa
Deal found 4/15$689
This KLM deal was found by Cheapflights users on 4/15. 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 10/95:15 pmYOW - LHR
2 stops12h 30mKLM
Thu 10/306:30 amLHR - YOW
2 stops13h 40mKLM
Deal found 4/15$709
This Austrian Airlines deal was found by Cheapflights users on 4/15. 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.
Sun 5/47:55 pmYOW - LHR
1 stop31h 40mAustrian Airlines
Sun 9/1410:25 amLHR - YOW
2 stops42h 54mAustrian Airlines
Deal found 4/15$868
This Cheapflightsfares deal was found by Cheapflights users on 4/15. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/910:00 amYOW - LHR
2 stops18h 05mAer Lingus
Sat 8/167:40 amLHR - YOW
2 stops18h 30mAer Lingus
Deal found 4/15$979
This Delta deal was found by Cheapflights users on 4/15. 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.
Thu 6/195:55 amYOW - LHR
2 stops22h 20mDelta
Mon 6/309:35 amLHR - YOW
2 stops19h 47mDelta
Deal found 4/15$1,108
This WestJet deal was found by Cheapflights users on 4/15. 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 WestJet is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/175:55 amYOW - LHR
2 stops25h 10mWestJet
Thu 9/182:10 pmLHR - YOW
1 stop15h 30mWestJet
Deal found 4/15$1,292

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 April 15, 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

Tue 10/7

3:55 pm-4:25 pm

2 stops19h 30m

London Heathrow

Wed 10/22

6:00 am-7:04 pm

2 stops18h 04m

$648

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 10/9

10:25 am-10:40 am

1 stop19h 15m

London Heathrow

Fri 10/31

8:55 am-11:43 pm

2 stops18h 48m

$656

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 10/9

5:15 pm-10:45 am

2 stops12h 30m

London Heathrow

Mon 10/20

6:15 am-3:05 pm

1 stop13h 50m

$678

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 5/7

9:00 pm-8:35 am

Nonstop6h 35m

London Heathrow

Thu 5/15

2:05 pm-4:35 pm

Nonstop7h 30m

$679

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 10/7

6:40 pm-10:00 am

1 stop10h 20m

London Heathrow

Wed 10/22

9:30 am-1:45 pm

1 stop9h 15m

$689

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 10/9

5:15 pm-10:45 am

2 stops12h 30m

London Heathrow

Thu 10/30

6:30 am-4:10 pm

2 stops13h 40m

$709

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 5/4

7:55 pm-8:35 am

1 stop31h 40m

London Heathrow

Sun 9/14

10:25 am-12:19 am

2 stops42h 54m

$868

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 8/9

10:00 am-9:05 am

2 stops18h 05m

London Heathrow

Sat 8/16

7:40 am-9:10 pm

2 stops18h 30m

$979

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 6/19

5:55 am-9:15 am

2 stops22h 20m

London Heathrow

Mon 6/30

9:35 am-12:22 am

2 stops19h 47m

$1,108

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 9/17

5:55 am-12:05 pm

2 stops25h 10m

London Heathrow

Thu 9/18

2:10 pm-12:40 am

1 stop15h 30m

$1,292

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 17 results
1
2

Compare providers for flights from Ottawa to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ottawa to Heathrow in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ottawa-London Heathrow Airport flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Ottawa-London Heathrow Airport flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Ottawa-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ottawa-London Heathrow Airport flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ottawa-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 April 11, 2025.

Booking 49 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 $1,110). 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 April 15, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 8% 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 Thursday afternoons when fares are most often at their lowest. Monday evenings 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 April 15, 2025.
See what other customers who have flown with Delta, KLM and Austrian Airlines from Ottawa to London have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,917 reviews
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,323 reviews
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
775 reviews
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,578 reviews
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,658 reviews
Delta
8.0
Very good
7,917 reviews

Entertainment

7.9

Overall

8.0

Comfort

7.9

Food

7.3

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 1 outbound flight 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, SWISS ($648), United Airlines ($656), and Air Canada ($679) offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 18% 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?

    $436 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on WestJet and Lufthansa, with prices starting from $469 and $505, respectively.

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

    Consider Air Canada (100%), Aegean Airlines (100%) or Austrian Airlines (100%) 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 $584. On average you can expect to pay $741. The most popular route, (Ottawa - London Heathrow), can usually be booked for $675.

  • 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 $1,110). 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
Hayes
Hounslow
Thornton Heath
Luton
Horley
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Canterbury
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Dover
Stratford-upon-Avon
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 April 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$454Average$598FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$619Average$745FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$704Average$854FlexibilityNo cancel feeOn-time67%

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