Find flights
Deals
When to book
Airlines
FAQs

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 2/6. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
10 Apr — 17 Apr1
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 45 days in advance, depart on a Tuesday or Thursday 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 11 March 2026.

Tue 19/52:35 p.m.
YOW
-
LHR
1 stop10h 55m
Multiple Airlines
Tue 26/512:40 p.m.
LHR
-
YOW
1 stop11h 13m
Multiple Airlines
Deal found 8/3C$ 828
Fri 29/52:00 p.m.
YOW
-
LHR
2 stops15h 00m
Air Canada
Fri 5/66:00 a.m.
LHR
-
YOW
2 stops16h 11m
Air Canada
Deal found 8/3C$ 832
Thu 14/59:30 p.m.
YOW
-
LHR
1 stop28h 00m
Multiple Airlines
Sun 24/512:05 p.m.
LHR
-
YOW
1 stop13h 46m
Multiple Airlines
Deal found 9/3C$ 835
Mon 25/58:50 a.m.
YOW
-
LHR
1 stop31h 10m
Air Canada
Sun 7/62:05 p.m.
LHR
-
YOW
1 stop11h 46m
Air Canada
Deal found 6/3C$ 838
Thu 14/59:30 p.m.
YOW
-
LHR
1 stop28h 00m
Air Canada
Sun 24/59:30 a.m.
LHR
-
YOW
1 stop17h 41m
Air Canada
Deal found 6/3C$ 842
Fri 29/56:00 a.m.
YOW
-
LHR
1 stop23h 00m
Air Canada
Sun 14/62:05 p.m.
LHR
-
YOW
1 stop13h 06m
Air Canada
Deal found 7/3C$ 843
Sat 16/512:15 p.m.
YOW
-
LHR
1 stop27h 45m
Air Canada
Sat 23/59:30 a.m.
LHR
-
YOW
1 stop16h 21m
Air Canada
Deal found 9/3C$ 854
Mon 18/56:55 p.m.
YOW
-
LHR
Nonstop6h 35m
Air Canada
Wed 17/62:10 p.m.
LHR
-
YOW
Nonstop7h 55m
Air Canada
Deal found 7/3C$ 861
Sat 23/55:30 p.m.
YOW
-
LHR
1 stop22h 30m
Air Canada
Sat 6/612:40 p.m.
LHR
-
YOW
1 stop24h 48m
Air Canada
Deal found 6/3C$ 869

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 11 March 2026.

Round-trip from

C$ 828

One-way from

C$ 439

Popular in

December

Cheapest in

November

Average price

C$ 1,054

Good round-trip deal

C$ 1,007 or less

Good one-way deal

C$ 926 or less
Air Canada
  • Air Canada
  • 19/5-26/5
  • 2 total stops
  • 22h 08m total
  • Ottawa to London
Search Deals
2/6
  • 2/6
  • 3 total stops
  • 20h 55m total
  • Ottawa to London
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 43 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Ottawa to London Heathrow.
Search Deals
Price to beat on a one-way flight from Ottawa to London Heathrow.
Search Deals

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 March 2026.
Use the filters below to find and compare flights from Ottawa to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 20/5

3:10 p.m.-7:15 a.m.

1 stop11h 05m

London Heathrow

Tue 26/5

10:50 a.m.-11:54 p.m.

2 stops18h 04m

C$ 948

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 16/5

12:00 p.m.-7:15 a.m.

2 stops14h 15m

London Heathrow

Sat 30/5

6:50 a.m.-6:48 p.m.

2 stops16h 58m

C$ 1,022

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 25/5

6:00 a.m.-6:55 a.m.

1 stop19h 55m

London Heathrow

Thu 28/5

5:50 p.m.-4:38 p.m.

2 stops27h 48m

C$ 1,024

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 1/5

10:44 a.m.-6:55 a.m.

2 stops15h 11m

London Heathrow

Wed 13/5

6:55 a.m.-10:05 p.m.

2 stops20h 10m

C$ 1,115

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 15/5

10:25 a.m.-10:15 a.m.

2 stops18h 50m

London Heathrow

Sun 24/5

7:25 a.m.-11:54 p.m.

2 stops21h 29m

C$ 1,115
Quickest round-trip

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 2/5

5:50 p.m.-9:20 a.m.

1 stop10h 30m

London Heathrow

Tue 12/5

10:25 a.m.-4:38 p.m.

1 stop11h 13m

C$ 1,126

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 8/4

10:55 a.m.-7:55 a.m.

2 stops16h 00m

London Heathrow

Tue 14/4

8:05 p.m.-5:36 p.m.

2 stops26h 31m

C$ 1,128

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 8/4

10:44 a.m.-7:15 a.m.

2 stops15h 31m

London Heathrow

Wed 15/4

10:50 a.m.-10:05 p.m.

2 stops16h 15m

C$ 1,166

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 1/7

5:10 p.m.-1:45 p.m.

1 stop15h 35m

London Heathrow

Sun 5/7

6:15 a.m.-3:00 p.m.

1 stop13h 45m

C$ 1,250

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 21/8

6:00 a.m.-9:35 p.m.

1 stop10h 35m

London Heathrow

Mon 31/8

12:10 p.m.-9:56 a.m.

2 stops50h 46m

C$ 1,294

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/3

Showing 1-10 of 22 resultsSorted by cheapest first
1
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 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 6 March 2026.

The best time to book flights from Ottawa to London Heathrow Airport is 45 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, November is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of C$ 607). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of C$ 912). 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 March 2026.

When flying from Ottawa to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 March 2026.
Read reviews from past customers who have flown Air France,United Airlines, andAir 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 France
7.4
Good
1,543 reviews
Check prices

Crew

8.1

Comfort

7.3

Boarding

7.4

Overall

7.4

Food

7.0

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Jayesh,Jan 2026

CDG - NMI

Entertainment needs more good Bollywood movies - as this flight was going to Mumbai, India. The Aircraft was a OLD - Is service to India cannot be improved ? The aircraft from Newark to Paris was great n new aircraft BUT aircraft from Paris to Mumbai was very old and poor class
Air France
7.4
Good
1,543 reviews
Air France
7.4
Good
1,543 reviews
Check prices

Crew

8.1

Comfort

7.3

Boarding

7.4

Overall

7.4

Food

7.0

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Jayesh,Jan 2026

CDG - NMI

Entertainment needs more good Bollywood movies - as this flight was going to Mumbai, India. The Aircraft was a OLD - Is service to India cannot be improved ? The aircraft from Newark to Paris was great n new aircraft BUT aircraft from Paris to Mumbai was very old and poor class
United Airlines
7.4
Good
9,413 reviews
Air France
7.4
Good
1,543 reviews
Check prices

Crew

8.1

Comfort

7.3

Boarding

7.4

Overall

7.4

Food

7.0

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Jayesh,Jan 2026

CDG - NMI

Entertainment needs more good Bollywood movies - as this flight was going to Mumbai, India. The Aircraft was a OLD - Is service to India cannot be improved ? The aircraft from Newark to Paris was great n new aircraft BUT aircraft from Paris to Mumbai was very old and poor class
Air Canada
7.1
Good
10,800 reviews
Air France
7.4
Good
1,543 reviews
Check prices

Crew

8.1

Comfort

7.3

Boarding

7.4

Overall

7.4

Food

7.0

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Jayesh,Jan 2026

CDG - NMI

Entertainment needs more good Bollywood movies - as this flight was going to Mumbai, India. The Aircraft was a OLD - Is service to India cannot be improved ? The aircraft from Newark to Paris was great n new aircraft BUT aircraft from Paris to Mumbai was very old and poor class
Lufthansa
6.8
Okay
7,841 reviews
Air France
7.4
Good
1,543 reviews
Check prices

Crew

8.1

Comfort

7.3

Boarding

7.4

Overall

7.4

Food

7.0

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Jayesh,Jan 2026

CDG - NMI

Entertainment needs more good Bollywood movies - as this flight was going to Mumbai, India. The Aircraft was a OLD - Is service to India cannot be improved ? The aircraft from Newark to Paris was great n new aircraft BUT aircraft from Paris to Mumbai was very old and poor class

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 4 airlines. Ottawa is conveniently located just 10.6 km from Ottawa’s city centre.

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

    A quick flight from Ottawa to London Heathrow Airport can take about 11h 05m. United Airlines provides one of the quickest options available for as low as C$ 948. The distance between Ottawa and London Heathrow Airport is about 5343 km.

  • 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$ 766. Other airlines that can offer you cheap pricing are United Airlines, from C$ 875, and Air Canada, from C$ 884. Air France is 27% 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$ 335), Air Canada (C$ 468), and Lufthansa (C$ 540).

  • 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 Aegean Airlines (40%), Croatia Airlines (40%) and Air Canada (38%).

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

    On average you can expect to pay C$ 1,589 for a flight from Ottawa to London Heathrow Airport. The cheapest flight overall is C$ 699 while the most popular route, (Ottawa - London Heathrow) is currently priced at C$ 828.

  • 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 C$ 607). Flying from Ottawa to London Heathrow Airport in July is currently the most expensive (average of C$ 912). 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
Twickenham
Sutton
Gatwick
Slough
Marlow
Cobham
Leamington Spa
Romford
Watford
Bedford
Luton
High Wycombe
Stratford-upon-Avon
Hounslow
Moreton-in-Marsh

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.

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 March 2026.
Air Canada flights from Ottawa to London Heathrow
Lufthansa flights from Ottawa to London Heathrow
United Airlines 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 March 2026.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapestC$ 766AverageC$ 1,013FlexibilityNo cancel feeOn-time77%
Search Air France flights
United AirlinesCheapestC$ 875AverageC$ 1,090FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapestC$ 884AverageC$ 1,036FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 923AverageC$ 1,058FlexibilityNo 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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.