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Cheap flights from Ottawa to London Heathrow Airport from £227

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 15/6. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
5 Mar — 12 Mar1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in November or January, booked 68 days in advance, depart on a Monday or Tuesday and return on a Friday

Cheap flight deals from Ottawa to Heathrow

Enter your travel dates to find the best prices.

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 3 February 2026.

Fri 12/605:55
YOW
-
LHR
2 stops33h 05m
Multiple Airlines
Sat 20/606:15
LHR
-
YOW
2 stops23h 05m
Multiple Airlines
Deal found 1/2£422
Wed 9/918:35
YOW
-
LHR
2 stops22h 00m
Multiple Airlines
Wed 23/906:15
LHR
-
YOW
2 stops23h 07m
Multiple Airlines
Deal found 2/2£429
Wed 10/605:55
YOW
-
LHR
2 stops34h 40m
Multiple Airlines
Sat 20/606:15
LHR
-
YOW
2 stops23h 07m
Multiple Airlines
Deal found 2/2£435
Sat 9/505:55
YOW
-
LHR
2 stops34h 50m
Multiple Airlines
Sat 23/506:15
LHR
-
YOW
2 stops23h 07m
Multiple Airlines
Deal found 3/2£452
Mon 25/517:30
YOW
-
LHR
1 stop22h 30m
Air Canada
Sun 7/614:05
LHR
-
YOW
1 stop24h 36m
Air Canada
Deal found 1/2£457
Mon 13/409:00
YOW
-
LHR
2 stops21h 55m
Multiple Airlines
Sat 18/413:05
LHR
-
YOW
2 stops16h 34m
Multiple Airlines
Deal found 1/2£458
Thu 21/517:30
YOW
-
LHR
1 stop22h 30m
Air Canada
Sun 31/512:40
LHR
-
YOW
1 stop24h 48m
Air Canada
Deal found 2/2£460
Mon 25/517:30
YOW
-
LHR
1 stop22h 30m
Multiple Airlines
Sun 7/609:30
LHR
-
YOW
1 stop16h 21m
Multiple Airlines
Deal found 2/2£463
Sun 31/520:00
YOW
-
LHR
1 stop10h 50m
Air Canada
Sun 14/609:30
LHR
-
YOW
2 stops15h 21m
Air Canada
Deal found 1/2£464
Fri 22/518:00
YOW
-
LHR
1 stop10h 35m
Air Canada
Fri 5/612:40
LHR
-
YOW
1 stop10h 53m
Air Canada
Deal found 1/2£465

Find 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 3 February 2026.

Round-trip from

£422

One-way from

£227

Popular in

December

Cheapest in

November

Average price

£555
12/6-20/6
  • 12/6-20/6
  • 4 total stops
  • 56h 10m total
  • Ottawa to London
Search Deals
15/6
  • 15/6
  • 2 total stops
  • 21h 20m total
  • Ottawa to London
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£15 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£12 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 3 February 2026.
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

Sun 22/2

17:20-08:00

1 stop9h 40m

London Heathrow

Fri 27/2

08:55-15:10

1 stop11h 15m

£501

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 15/5

09:05-10:00

1 stop19h 55m

London Heathrow

Sat 23/5

17:40-17:10

1 stop28h 30m

£508

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 28/4

17:10-16:35

1 stop18h 25m

London Heathrow

Mon 4/5

08:55-15:00

1 stop11h 05m

£514

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 27/4

17:25-13:45

1 stop15h 20m

London Heathrow

Mon 11/5

08:55-15:00

1 stop11h 05m

£514

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 22/5

12:00-06:55

2 stops37h 55m

London Heathrow

Sun 31/5

06:50-16:15

2 stops14h 25m

£536

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 28/4

17:10-10:45

2 stops12h 35m

London Heathrow

Mon 4/5

08:55-15:00

1 stop11h 05m

£541

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 7/4

17:10-10:45

2 stops12h 35m

London Heathrow

Sun 19/4

17:35-15:00

1 stop26h 25m

£547

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 31/3

10:50-07:55

2 stops16h 05m

London Heathrow

Mon 20/4

08:40-19:34

2 stops15h 54m

£551

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 7/4

17:10-10:45

2 stops12h 35m

London Heathrow

Tue 21/4

06:30-15:00

2 stops13h 30m

£560

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 7/4

17:10-10:45

2 stops12h 35m

London Heathrow

Mon 20/4

06:30-15:00

2 stops13h 30m

£560

Flights are sorted by cheapest return flights first.

Deals found on 31/1

Showing 1-10 of 22 results
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2
3

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 return 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 return flight from Ottawa to Heathrow. Price data was last updated on 30 January 2026.

Booking 68 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 £327). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of £491). 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 3 February 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ottawa to London Heathrow Airport as you normally would.

How much does it cost for a return flight from Ottawa to London Heathrow Airport?

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 3 February 2026.
Read reviews from past customers who have flown with Air Canada from Ottawa to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
10,684 reviews
Check prices

Entertainment

6.8

Overall

7.1

Boarding

7.3

Comfort

7.1

Food

6.3

Crew

7.8

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.
Air Canada
7.1
Good
10,684 reviews
Air Canada
7.1
Good
10,684 reviews
Check prices

Entertainment

6.8

Overall

7.1

Boarding

7.3

Comfort

7.1

Food

6.3

Crew

7.8

Reviews

1 / 20
4.0
Okay

Sugith,Jan 2026

YSB - YYZ

Left 2 hours late. Stuck on plane for an hour after boarding before take off.

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?

    If you book a flight to London Heathrow from Ottawa, you will be flying from Ottawa, which is the city’s only airport. Ottawa (YOW) is located 6.6 mi from the center of Ottawa. There are 0 flights from Ottawa to London Heathrow per day from 1 airline.

  • How long is the flight from Ottawa to London Heathrow Airport?

    For as low as £501, Air France can have you in London Heathrow Airport from Ottawa in 9h 40m. Ottawa and London Heathrow Airport are separated by a distance of 3320 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Ottawa to London Heathrow Airport round-trip?

    According to our current data, Air Canada (£471), offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 16% less than the average price by searching for this airline.

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

    No one likes to see their flight delayed. When booking a flight from Ottawa to London Heathrow Airport consider choosing Air Canada (33%), Aegean Airlines (33%) or Austrian Airlines (33%) as they are the most reliable in getting you off to your destination on time.

  • 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 holiday 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 £327). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of £491). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Milton Keynes
Croydon
Luton
Northampton
Wembley
Gatwick
Slough
Ilford
Hounslow
Brentford
Hayes
Colchester
Watford
Guildford
Swindon
Bedford
Chelmsford
Eastbourne
Crawley
Kingston upon Thames

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Ottawa to Heathrow

Discover the top airline 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 858,174 searches. Data last updated 3 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapest£471Average£602FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers 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?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Ottawa to Heathrow for you. Better yet — we are completely free to use.

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

Users can book flights with no change fees policies with our dedicated filters. Book flights from Ottawa to Heathrow flexibly with Cheapflights today.

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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