HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$344+ 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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
YOW — LHR
Jul 23 — Jul 301
Thu 7/23
Thu 7/30
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ottawa to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.
Cheapflights Tip: The best prices from Ottawa to London Heathrow are usually found in January or November, booked 54 days in advance, depart on a Thursday or Monday and return on a Wednesday

Cheap 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 June 23, 2026.

This Virgin Atlantic deal was found by Cheapflights users on 6/23. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/275:25 pm
YOW
-
LHR
1 stop9h 30m
Virgin Atlantic
Mon 6/2910:45 am
LHR
-
YOW
2 stops18h 35m
Virgin Atlantic
Deal found 6/23$547
This United Airlines deal was found by Cheapflights users on 6/19. 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 9/116:25 am
YOW
-
LHR
1 stop24h 30m
United Airlines
Sun 9/1311:05 am
LHR
-
YOW
2 stops51h 06m
United Airlines
Deal found 6/19$549
This Lufthansa deal was found by Cheapflights users on 6/23. 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.
Wed 9/169:00 pm
YOW
-
LHR
Nonstop6h 35m
Lufthansa
Mon 9/289:30 am
LHR
-
YOW
Nonstop7h 55m
Lufthansa
Deal found 6/23$631
This Lufthansa deal was found by Cheapflights users on 6/23. 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.
Thu 9/106:55 pm
YOW
-
LHR
Nonstop6h 35m
Lufthansa
Thu 9/179:30 am
LHR
-
YOW
Nonstop7h 55m
Lufthansa
Deal found 6/23$632
This Lufthansa deal was found by Cheapflights users on 6/22. 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.
Wed 9/29:00 pm
YOW
-
LHR
Nonstop6h 35m
Lufthansa
Mon 9/79:30 am
LHR
-
YOW
Nonstop7h 55m
Lufthansa
Deal found 6/22$633
This Lufthansa deal was found by Cheapflights users on 6/22. 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.
Tue 9/83:10 pm
YOW
-
LHR
1 stop10h 20m
Lufthansa
Mon 9/219:30 am
LHR
-
YOW
Nonstop7h 55m
Lufthansa
Deal found 6/22$635
This Lufthansa deal was found by Cheapflights users on 6/22. 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.
Wed 9/29:00 pm
YOW
-
LHR
Nonstop6h 35m
Lufthansa
Sun 9/62:05 pm
LHR
-
YOW
1 stop11h 45m
Lufthansa
Deal found 6/22$636
This Air Canada deal was found by Cheapflights users on 6/23. 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.
Sun 9/132:35 pm
YOW
-
LHR
1 stop10h 55m
Air Canada
Sat 9/192:10 pm
LHR
-
YOW
Nonstop7h 55m
Air Canada
Deal found 6/23$638
This Air Canada deal was found by Cheapflights users on 6/19. 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.
Sat 9/129:00 pm
YOW
-
LHR
Nonstop6h 35m
Air Canada
Mon 9/289:30 am
LHR
-
YOW
Nonstop7h 55m
Air Canada
Deal found 6/19$639
This Air Canada deal was found by Cheapflights users on 6/23. 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.
Sun 9/67:30 pm
YOW
-
LHR
1 stop9h 30m
Air Canada
Sun 9/139:30 am
LHR
-
YOW
1 stop12h 59m
Air Canada
Deal found 6/23$641
This Air Canada deal was found by Cheapflights users on 6/22. 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.
Sat 9/54:00 pm
YOW
-
LHR
1 stop9h 35m
Air Canada
Sat 9/1912:40 pm
LHR
-
YOW
1 stop11h 10m
Air Canada
Deal found 6/22$642

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 June 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$549
(United Airlines)

One-way from

$344
(Lufthansa)

Popular in

December

Cheapest in

January

Average price

$847

Good round-trip deal

$360 or less

Good one-way deal

$690 or less
Provider with most accurate pricing for Ottawa-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ottawa-London Heathrow flights.
Search Deals
From Ottawa to London Heathrow
Search Deals
One-way flight from Ottawa to London Heathrow
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($1 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 2,558,603 searches. Data last updated June 23, 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

Fri 9/18

2:35 pm-6:30 am

1 stop10h 55m

London Heathrow

Mon 9/21

9:30 am-12:25 pm

Nonstop7h 55m

$635

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Tue 9/8

3:10 pm-6:30 am

1 stop10h 20m

London Heathrow

Mon 9/21

2:05 pm-10:10 pm

1 stop13h 05m

$638

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 9/16

3:10 pm-9:20 pm

1 stop25h 10m

London Heathrow

Mon 9/28

8:40 am-9:56 am

2 stops30h 16m

$667

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 9/9

2:52 pm-10:40 am

1 stop14h 48m

London Heathrow

Sat 9/26

6:50 am-11:54 pm

2 stops22h 04m

$674

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Fri 9/18

5:10 pm-10:45 am

2 stops12h 35m

London Heathrow

Mon 9/21

7:45 pm-3:00 pm

1 stop24h 15m

$703
Quickest round-trip

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 7/29

9:05 pm-8:35 am

Nonstop6h 30m

London Heathrow

Thu 9/3

2:05 pm-8:50 pm

1 stop11h 45m

$726

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Mon 11/23

10:30 am-6:20 am

2 stops14h 50m

London Heathrow

Fri 11/27

6:35 am-7:27 pm

2 stops17h 52m

$735

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Sat 11/14

2:00 pm-10:50 am

1 stop15h 50m

London Heathrow

Fri 11/20

6:00 pm-9:56 pm

1 stop32h 56m

$748

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Wed 7/29

5:50 pm-9:20 am

1 stop10h 30m

London Heathrow

Thu 9/3

6:50 am-10:35 pm

2 stops20h 45m

$765

OttawaLondon

YOW - LHR

YOWLHR

Ottawa

Thu 7/23

3:10 pm-8:40 pm

1 stop24h 30m

London Heathrow

Thu 7/30

7:45 am-11:54 pm

2 stops21h 09m

$860

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/19

Showing 1-10 of 21 resultsSorted by cheapest first
1
2
3

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 June.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
Thrive TravelPrice Accuracy3 starsTrust Score*2 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ottawa-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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?

Booking 53 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, January is the cheapest month in which you can book a flight from Ottawa to London Heathrow Airport (average of $712). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of $997). 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 June 23, 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 to fly round-trip 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 June 23, 2026.
See what other customers who have flown with Air Canada and Lufthansa from Ottawa to London Heathrow Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Air Canada
7.1
Good
11,249 reviews

Entertainment

6.8

Overall

7.1

Food

6.3

Boarding

7.3

Crew

7.8

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Lori,May 2026

YYZ - YFC

Didn't land, sent back to Toronto. No food, no accommodation, no help at all!!
Air Canada
7.1
Good
11,249 reviews
Air Canada
7.1
Good
11,249 reviews

Entertainment

6.8

Overall

7.1

Food

6.3

Boarding

7.3

Crew

7.8

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Lori,May 2026

YYZ - YFC

Didn't land, sent back to Toronto. No food, no accommodation, no help at all!!
Lufthansa
6.8
Okay
8,092 reviews
Air Canada
7.1
Good
11,249 reviews

Entertainment

6.8

Overall

7.1

Food

6.3

Boarding

7.3

Crew

7.8

Comfort

7.1

Reviews

1 / 20
2.0
Mediocre

Lori,May 2026

YYZ - YFC

Didn't land, sent back to Toronto. No food, no accommodation, no help at all!!

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 2 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.

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

    Lufthansa and United Airlines can get you from Ottawa to London Heathrow Airport in just under 10h 20m. Your travel time can differ by up to 14h 50m. The distance between Ottawa and London Heathrow Airport is about 3320 mi. This flight may include one or multiple stops.

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

    According to our current data, Lufthansa ($650), and Air Canada ($654) offers the cheapest pricing from Ottawa to London Heathrow Airport. You may be able to fly from Ottawa to London Heathrow Airport for 19% less than the average price by searching for these airlines.

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

    Consider United Airlines (70%), Air Canada (66%) or Aegean Airlines (66%) 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 $360. On average you can expect to pay $880. The most popular route, (Ottawa - London Heathrow), can usually be booked for $635.

  • 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 $712). Flying from Ottawa to London Heathrow Airport in December is currently the most expensive (average of $997). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Dorking
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Wembley
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough

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.

Alternative routes for Ottawa to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
Pearson Intl to Heathrow flights
Pierre Elliott Trudeau Intl to Heathrow flights

Top 2 airlines flying from Ottawa to Heathrow

Discover the top 2 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 June 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$650Average$843FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$654Average$810FlexibilityNo cancel feeOn-time67%

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.