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Cheap flights from Ottawa to London Heathrow Airport from C$ 477

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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
16 Apr — 23 Apr1
1 adult

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 Saturday or Sunday 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 11 April 2025.

Round-trip from

C$ 906

One-way from

C$ 486

Popular in

December

Cheapest in

February

Average price

C$ 1,004

Good round-trip deal

C$ 999 or less

Good one-way deal

C$ 1,076 or less
United Airlines
  • United Airlines
  • 3/5-14/5
  • 4 total stops
  • 35h 33m total
  • Ottawa to London
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9/7
  • 9/7
  • 2 total stops
  • 34h 50m total
  • Ottawa to London
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Highest demand for flights based on searches. 4% potential increase in price (C$ 69 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 44 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 11 April 2025.

Tue 13/56:15 p.m.YOW - LHR
1 stop10h 05mUnited Airlines
Tue 20/58:45 a.m.LHR - YOW
2 stops30h 13mUnited Airlines
Deal found 10/4C$ 906
Wed 24/94:00 p.m.YOW - LHR
1 stop13h 00mMultiple Airlines
Wed 8/106:50 a.m.LHR - YOW
2 stops11h 55mMultiple Airlines
Deal found 9/4C$ 934
Wed 7/55:15 p.m.YOW - LHR
1 stop18h 20mAir France
Tue 13/56:15 a.m.LHR - YOW
1 stop13h 50mAir France
Deal found 9/4C$ 960
Wed 29/106:20 p.m.YOW - LHR
2 stops12h 25mKLM
Sun 9/116:30 a.m.LHR - YOW
2 stops13h 40mKLM
Deal found 10/4C$ 972
Wed 14/59:00 p.m.YOW - LHR
Nonstop6h 35mAir Canada
Thu 22/52:05 p.m.LHR - YOW
Nonstop7h 30mAir Canada
Deal found 9/4C$ 993
Mon 28/44:45 p.m.YOW - LHR
1 stop12h 15mLufthansa
Thu 8/56:55 a.m.LHR - YOW
2 stops17h 09mLufthansa
Deal found 9/4C$ 1,011
Mon 7/72:25 p.m.YOW - LHR
2 stops26h 05mSWISS
Wed 27/85:10 p.m.LHR - YOW
2 stops34h 58mSWISS
Deal found 10/4C$ 1,042
Sun 15/64:05 p.m.YOW - LHR
1 stop12h 55mAustrian Airlines
Wed 18/610:25 a.m.LHR - YOW
2 stops42h 55mAustrian Airlines
Deal found 9/4C$ 1,082
Wed 18/64:05 p.m.YOW - LHR
2 stops23h 50mBrussels Airlines
Wed 25/66:50 a.m.LHR - YOW
2 stops11h 54mBrussels Airlines
Deal found 10/4C$ 1,184

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 11 April 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 13/5

6:15 p.m.-9:20 a.m.

1 stop10h 05m

London Heathrow

Tue 20/5

8:45 a.m.-9:58 a.m.

2 stops30h 13m

C$ 906

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 24/9

4:00 p.m.-10:00 a.m.

1 stop13h 00m

London Heathrow

Wed 8/10

6:50 a.m.-1:45 p.m.

2 stops11h 55m

C$ 934

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 7/5

5:15 p.m.-4:35 p.m.

1 stop18h 20m

London Heathrow

Tue 13/5

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

1 stop13h 50m

C$ 960

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 14/5

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

Nonstop6h 35m

London Heathrow

Thu 22/5

2:05 p.m.-4:35 p.m.

Nonstop7h 30m

C$ 993

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 28/4

4:45 p.m.-10:00 a.m.

1 stop12h 15m

London Heathrow

Thu 8/5

6:55 a.m.-7:04 p.m.

2 stops17h 09m

C$ 1,011

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 7/7

2:25 p.m.-9:30 p.m.

2 stops26h 05m

London Heathrow

Wed 27/8

5:10 p.m.-11:08 p.m.

2 stops34h 58m

C$ 1,042

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 18/5

3:55 p.m.-10:15 a.m.

2 stops13h 20m

London Heathrow

Tue 27/5

6:50 a.m.-1:50 p.m.

2 stops12h 00m

C$ 1,053

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 11/6

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

2 stops12h 30m

London Heathrow

Tue 17/6

6:30 a.m.-3:05 p.m.

2 stops13h 35m

C$ 1,070

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sun 15/6

4:05 p.m.-10:00 a.m.

1 stop12h 55m

London Heathrow

Wed 18/6

10:25 a.m.-12:20 a.m.

2 stops42h 55m

C$ 1,082

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 9/7

5:55 a.m.-10:30 p.m.

2 stops35h 35m

C$ 477

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/4

Showing 1-10 of 14 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 4 April 2025.

The best time to book flights from Ottawa to London Heathrow Airport is 56 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$ 874). 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 11 April 2025.

It’s typically best to fly out from Ottawa to London Heathrow Airport in the evening. Doing so could potentially save you 5% on the flight price compared to flying in the afternoon, 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 Sunday evenings 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 11 April 2025.
See what other customers who have flown with Delta, KLM and Austrian Airlines from Ottawa to London have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,911 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

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
7,911 reviews
Delta
8.0
Very good
7,911 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

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
1,321 reviews
Delta
8.0
Very good
7,911 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

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
774 reviews
Delta
8.0
Very good
7,911 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

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
1,575 reviews
Delta
8.0
Very good
7,911 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

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.
Air France
7.4
Good
1,428 reviews
Delta
8.0
Very good
7,911 reviews
Check prices

Overall

8.0

Comfort

7.9

Crew

8.5

Food

7.3

Entertainment

7.9

Boarding

8.2

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?

    Most people fly from Ottawa (YOW) if they book a flight from Ottawa to London Heathrow. On average, Ottawa has 3 outbound flights to London Heathrow per day from 4 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$ 906. Other airlines that can offer you cheap pricing are Air France, from C$ 979, and Air Canada, from C$ 1,009. United Airlines is 18% 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$ 587), Lufthansa (C$ 692), and Austrian Airlines (C$ 702).

  • 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 (100%), Aegean Airlines (100%) and Austrian Airlines (100%).

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

    On average you can expect to pay C$ 1,572 for a flight from Ottawa to London Heathrow Airport. The cheapest flight overall is C$ 834 while the most popular route, (Ottawa - London Heathrow) is currently priced at C$ 872.

  • Where are the most common layover locations when flying from Ottawa to London Heathrow Airport?

    Most of the time, Ottawa to London Heathrow Airport flights that have layovers will stop in Montreal.

  • What are some popular things to do or see while on a layover in Montreal?

    The majority of Montreal visitors spend their time at Centre Bell, Vieux-Port de Montréal, and Notre-Dame Basilica. Travelers on a layover in Montreal can visit Centre Bell, Vieux-Port de Montréal, and Notre-Dame Basilica, by traveling 14.6 km, 16.2 km, and 15.9 km, respectively after landing at Montreal Pierre Elliott Trudeau Intl. Those looking to explore during their layover in Montreal can rent a car from Montreal Pierre Elliott Trudeau Intl for about C$ 58 per day.

  • Where are the least popular layover locations for Ottawa to London Heathrow Airport flights?

    Flights departing from Ottawa and landing in London Heathrow Airport layover in Toronto least frequently.

  • 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$ 874). 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
Hounslow
Sutton
Slough
Milton Keynes
Romford
Watford
Luton
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 11 April 2025.
Air Canada flights from Ottawa to London Heathrow
Lufthansa flights from Ottawa to London Heathrow

Top 4 airlines flying from Ottawa to Heathrow

Discover the top 4 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 11 April 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapestC$ 744AverageC$ 837FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
Air FranceCheapestC$ 744AverageC$ 939FlexibilityNo cancel feeOn-time77%
Search Air France flights
Air CanadaCheapestC$ 927AverageC$ 1,103FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 939AverageC$ 1,072FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

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?

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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