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Heathrow

$328+ 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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1. Tell us where you want to go

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Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in February or January, booked 56 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 30, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$651
(United Airlines)

One-way from

$328
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$716

Good round-trip deal

$718 or less

Good one-way deal

$708 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
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($43 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($23 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 30, 2025.

This United Airlines deal was found by Cheapflights users on 4/29. 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.
Fri 5/166:30 amYOW - LHR
2 stops20h 50mUnited Airlines
Sat 5/317:45 amLHR - YOW
2 stops31h 13mUnited Airlines
Deal found 4/29$651
This LATAM Airlines deal was found by Cheapflights users on 4/29. 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 LATAM Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/168:55 pmYOW - LHR
1 stop28h 35mMultiple Airlines
Sat 5/311:00 pmLHR - YOW
1 stop14h 09mMultiple Airlines
Deal found 4/29$704
This Lufthansa deal was found by Cheapflights users on 4/29. 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.
Sun 5/114:05 pmYOW - LHR
1 stop9h 25mLufthansa
Wed 5/217:25 amLHR - YOW
2 stops14h 39mLufthansa
Deal found 4/29$740
This Austrian Airlines deal was found by Cheapflights users on 4/29. 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.
Wed 9/107:55 pmYOW - LHR
1 stop10h 55mAustrian Airlines
Fri 9/196:00 amLHR - YOW
2 stops16h 04mAustrian Airlines
Deal found 4/29$746
This Air Canada deal was found by Cheapflights users on 4/29. 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 5/122:35 pmYOW - LHR
1 stop14h 25mAir Canada
Wed 5/219:30 amLHR - YOW
1 stop14h 30mAir Canada
Deal found 4/29$747
This SWISS deal was found by Cheapflights users on 4/29. 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 5/61:55 pmYOW - LHR
2 stops24h 25mSWISS
Tue 5/136:40 pmLHR - YOW
2 stops29h 24mSWISS
Deal found 4/29$814
This Air France deal was found by Cheapflights users on 4/29. 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.
Sat 7/265:15 pmYOW - LHR
1 stop9h 45mAir France
Tue 8/193:25 pmLHR - YOW
2 stops13h 57mAir France
Deal found 4/29$915
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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.
Tue 7/11:55 pmYOW - LHR
2 stops13h 05mAer Lingus
Fri 7/117:40 amLHR - YOW
2 stops18h 30mAer Lingus
Deal found 4/29$920
This KLM deal was found by Cheapflights users on 4/29. 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 7/35:15 pmYOW - LHR
2 stops15h 35mKLM
Wed 7/96:30 amLHR - YOW
2 stops13h 35mKLM
Deal found 4/29$1,095
This Delta deal was found by Cheapflights users on 4/29. 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.
Wed 4/305:55 amYOW - LHR
2 stops22h 00mDelta
Wed 5/75:50 pmLHR - YOW
1 stop11h 32mDelta
Deal found 4/29$1,111
This WestJet deal was found by Cheapflights users on 4/29. 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.
Sat 8/303:45 pmYOW - LHR
1 stop15h 20mWestJet
Sun 8/312:10 pmLHR - YOW
1 stop15h 31mWestJet
Deal found 4/29$1,355

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 30, 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

Fri 5/16

6:30 am-8:20 am

2 stops20h 50m

London Heathrow

Sat 5/31

7:45 am-9:58 am

2 stops31h 13m

$651

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 5/16

8:55 pm-6:30 am

1 stop28h 35m

London Heathrow

Sat 5/31

1:00 pm-10:09 pm

1 stop14h 09m

$704

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 5/11

4:05 pm-6:30 am

1 stop9h 25m

London Heathrow

Wed 5/21

7:25 am-5:04 pm

2 stops14h 39m

$740

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 9/10

7:55 pm-11:50 am

1 stop10h 55m

London Heathrow

Fri 9/19

6:00 am-5:04 pm

2 stops16h 04m

$746

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 5/12

2:35 pm-10:00 am

1 stop14h 25m

London Heathrow

Wed 5/21

9:30 am-7:00 pm

1 stop14h 30m

$747

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 6/13

2:40 pm-8:15 am

2 stops36h 35m

London Heathrow

Fri 6/20

8:40 am-5:05 pm

2 stops37h 25m

$827

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 7/26

5:15 pm-8:00 am

1 stop9h 45m

London Heathrow

Tue 8/19

3:25 pm-12:22 am

2 stops13h 57m

$915

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 7/1

1:55 pm-8:00 am

2 stops13h 05m

London Heathrow

Fri 7/11

7:40 am-9:10 pm

2 stops18h 30m

$920

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 7/3

5:15 pm-1:50 pm

2 stops15h 35m

London Heathrow

Wed 7/9

6:30 am-3:05 pm

2 stops13h 35m

$1,095

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 8/30

3:45 pm-12:05 pm

1 stop15h 20m

London Heathrow

Sun 8/31

2:10 pm-12:41 am

1 stop15h 31m

$1,355

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 16 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 25, 2025.

Booking 56 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 30, 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 30, 2025.
See what other customers who have flown with KLM, Austrian Airlines and SWISS 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
1,334 reviews

Entertainment

7.1

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,334 reviews
KLM
7.8
Good
1,334 reviews

Entertainment

7.1

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Austrian Airlines
7.6
Good
780 reviews
KLM
7.8
Good
1,334 reviews

Entertainment

7.1

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
SWISS
7.5
Good
1,588 reviews
KLM
7.8
Good
1,334 reviews

Entertainment

7.1

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Air France
7.4
Good
1,446 reviews
KLM
7.8
Good
1,334 reviews

Entertainment

7.1

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
United Airlines
7.4
Good
8,696 reviews
KLM
7.8
Good
1,334 reviews

Entertainment

7.1

Comfort

7.7

Crew

8.4

Overall

7.8

Boarding

7.8

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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, United Airlines ($651), Lufthansa ($740), and Austrian Airlines ($746) offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 17% 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?

    $420 is the cheapest one-way deal found within the past few days, from Air Canada. You may also be able to find cheap deals on Lufthansa and United Airlines, with prices starting from $422 and $456, respectively.

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

    Consider Air Canada (89%), Aegean Airlines (89%) or Austrian Airlines (89%) 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 $816. The most popular route, (Ottawa - London Heathrow), can usually be booked for $637.

  • 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
Canterbury
Harrow
Wembley
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
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Borehamwood
Folkestone
Ilford
Broadway
Aylesbury

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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapest$454Average$598FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$619Average$735FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$702Average$842FlexibilityNo cancel feeOn-time67%

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