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Cheap flights from Ottawa to London Heathrow Airport from C$ 439

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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
17 Jun — 24 Jun1
1 adult

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 Thursday or Saturday and return on a Monday

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 12 June 2025.

Round-trip from

C$ 927

One-way from

C$ 439

Popular in

December

Cheapest in

February

Average price

C$ 1,103

Good round-trip deal

C$ 1,021 or less

Good one-way deal

C$ 1,024 or less
United Airlines
  • United Airlines
  • 11/10-18/10
  • 4 total stops
  • 29h 24m total
  • Ottawa to London
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7/8
  • 7/8
  • 2 total stops
  • 15h 50m total
  • Ottawa to London
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Highest demand for flights based on searches. 6% potential increase in price (C$ 102 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease (C$ 45 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 12 June 2025.

Sat 11/1011:55 a.m.YOW - LHR
2 stops14h 20mUnited Airlines
Sat 18/1011:05 a.m.LHR - YOW
2 stops15h 04mUnited Airlines
Deal found 10/6C$ 927
Thu 25/91:55 p.m.YOW - LHR
2 stops14h 10mAer Lingus
Thu 2/109:50 a.m.LHR - YOW
2 stops16h 19mAer Lingus
Deal found 10/6C$ 979
Mon 4/82:25 p.m.YOW - LHR
2 stops25h 35mAir Canada
Mon 11/812:40 p.m.LHR - YOW
1 stop15h 28mAir Canada
Deal found 10/6C$ 999
Mon 21/76:30 p.m.YOW - LHR
1 stop31h 00mMultiple Airlines
Thu 14/86:00 a.m.LHR - YOW
2 stops22h 08mMultiple Airlines
Deal found 11/6C$ 1,001
Tue 2/96:40 p.m.YOW - LHR
1 stop30h 50mLufthansa
Thu 18/96:55 a.m.LHR - YOW
2 stops22h 24mLufthansa
Deal found 12/6C$ 1,016
Wed 10/97:50 p.m.YOW - LHR
1 stop11h 00mAustrian Airlines
Thu 25/910:25 a.m.LHR - YOW
2 stops42h 54mAustrian Airlines
Deal found 11/6C$ 1,024
Mon 15/95:15 p.m.YOW - LHR
1 stop9h 45mAir France
Thu 9/106:15 a.m.LHR - YOW
1 stop13h 50mAir France
Deal found 11/6C$ 1,058
Tue 9/95:15 p.m.YOW - LHR
2 stops12h 30mKLM
Sun 28/96:30 a.m.LHR - YOW
2 stops13h 30mKLM
Deal found 12/6C$ 1,224

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 629,999 searches. Data last updated 12 June 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 11/10

11:55 a.m.-7:15 a.m.

2 stops14h 20m

London Heathrow

Sat 18/10

11:05 a.m.-9:09 p.m.

2 stops15h 04m

C$ 927

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 26/9

5:15 p.m.-8:00 a.m.

1 stop9h 45m

London Heathrow

Sun 12/10

9:00 a.m.-3:05 p.m.

1 stop11h 05m

C$ 976

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 25/9

1:55 p.m.-9:05 a.m.

2 stops14h 10m

London Heathrow

Thu 2/10

9:50 a.m.-9:09 p.m.

2 stops16h 19m

C$ 979

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 4/8

2:25 p.m.-9:00 p.m.

2 stops25h 35m

London Heathrow

Mon 11/8

12:40 p.m.-11:08 p.m.

1 stop15h 28m

C$ 999

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 21/7

6:30 p.m.-6:30 a.m.

1 stop31h 00m

London Heathrow

Thu 14/8

6:00 a.m.-11:08 p.m.

2 stops22h 08m

C$ 1,001

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 10/9

7:50 p.m.-11:50 a.m.

1 stop11h 00m

London Heathrow

Fri 26/9

6:00 a.m.-12:19 a.m.

2 stops23h 19m

C$ 1,024

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 10/9

9:00 p.m.-8:35 a.m.

Nonstop6h 35m

London Heathrow

Wed 24/9

12:40 p.m.-3:00 p.m.

Nonstop7h 20m

C$ 1,027

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 15/9

5:15 p.m.-8:00 a.m.

1 stop9h 45m

London Heathrow

Thu 9/10

6:15 a.m.-3:05 p.m.

1 stop13h 50m

C$ 1,058

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 9/9

5:15 p.m.-10:45 a.m.

2 stops12h 30m

London Heathrow

Sun 28/9

6:30 a.m.-3:00 p.m.

2 stops13h 30m

C$ 1,224

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 7/8

5:05 p.m.-1:55 p.m.

2 stops15h 50m

C$ 439

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/6

Showing 1-10 of 15 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 9 June 2025.

The best time to book flights from Ottawa to London Heathrow Airport is 9 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, January is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of C$ 560). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of C$ 857). 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 12 June 2025.

It’s typically best to fly out from Ottawa to London Heathrow Airport in the evening. Doing so could potentially save you 3% on the flight price compared to flying at noon, which is usually more expensive.

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 16 December 2024.

Travelers seeking maximum savings on their Ottawa to London Heathrow Airport flight should consider departing on Friday afternoons when fares are most often at their lowest. Tuesday 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 40.0 - 70.0 mm per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

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 12 June 2025.
See what other customers who have flown with KLM, Austrian Airlines and Air France from Ottawa to London have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Overall

7.8

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

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
Check prices

Food

7.2

Overall

7.8

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

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
Check prices

Food

7.2

Overall

7.8

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

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
Check prices

Food

7.2

Overall

7.8

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

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
Check prices

Food

7.2

Overall

7.8

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

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.
Virgin Atlantic
7.4
Good
652 reviews
KLM
7.8
Good
1,358 reviews
Check prices

Food

7.2

Overall

7.8

Comfort

7.7

Entertainment

7.1

Boarding

7.8

Crew

8.4

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?

    Most people fly from Ottawa (YOW) if they book a flight from Ottawa to London Heathrow. On average, Ottawa has 0 outbound flights to London Heathrow per day from 5 airlines. Ottawa is conveniently located just 10.6 km from Ottawa’s city centre.

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

    Cheapflights users have booked flights from Ottawa to London Heathrow Airport round-trip from C$ 927. Other airlines that can offer you cheap pricing are Virgin Atlantic, from C$ 976, and Aer Lingus, from C$ 979. United Airlines is 12% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The cheapest airlines for a one-way flight from Ottawa to London Heathrow Airport are WestJet (C$ 487), Air Canada (C$ 488), and Lufthansa (C$ 499).

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

    The top 3 most reliable airlines when flying from Ottawa to London Heathrow Airport are Air Canada (83%), Aegean Airlines (83%) and Austrian Airlines (83%).

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

    On average you can expect to pay C$ 1,934 for a flight from Ottawa to London Heathrow Airport. The cheapest flight overall is C$ 489 while the most popular route, (Ottawa - London Heathrow) is currently priced at C$ 882.

  • 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, January is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of C$ 560). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of C$ 857). 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

Travelling to a place near Ottawa?

Book flights to Ottawa if you plan to visit one of these locations
Brentford
Sutton
Hounslow
Slough
Leamington Spa
Milton Keynes
Romford
Watford
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Bromley
Bedford
Southall

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Fly from Ottawa to Heathrow on these airlines

Choose from the following airlines for your flight from Ottawa to Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 12 June 2025.
Air Canada flights from Ottawa to London Heathrow
Lufthansa flights from Ottawa to London Heathrow
United Airlines flights from Ottawa to London Heathrow

Top 5 airlines flying from Ottawa to Heathrow

Discover the top 5 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 629,999 searches. Data last updated 12 June 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapestC$ 725AverageC$ 815FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapestC$ 725AverageC$ 905FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapestC$ 890AverageC$ 972FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 896AverageC$ 1,038FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 939AverageC$ 1,049FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Ottawa to Heathrow?

When you search for this flight from Ottawa to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Ottawa to Heathrow?

Millions of users choose and trust Cheapflights to book the best flight deals from Ottawa to Heathrow for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Ottawa to Heathrow with no change fees?

Yes, we can. To see specific flights from Ottawa to Heathrow with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ottawa to Heathrow become cheaper?

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