HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$336+ Cheap flights from Pierre Elliott Trudeau Intl (YUL) 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 9/2. Fares are subject to change and may not be available on all flights or dates of travel.
YUL — LHR
Jul 11 — Jul 181
Sat 7/11
Sat 7/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Pierre Elliott Trudeau Intl 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 Montreal Pierre Elliott Trudeau Intl to London Heathrow are usually found in November or October, booked 81 days in advance, depart on a Sunday or Wednesday and return on a Thursday

Cheap flight deals from Pierre Elliott Trudeau Intl to Heathrow

Cheapest flights from Pierre Elliott Trudeau Intl to Heathrow
Explore the most affordable flight options available from Pierre Elliott Trudeau Intl to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 11, 2026.

This Air Canada deal was found by Cheapflights users on 6/10. 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.
Tue 9/225:10 pm
YUL
-
LHR
1 stop13h 40m
Air Canada
Mon 9/288:40 am
LHR
-
YUL
1 stop11h 20m
Air Canada
Deal found 6/10$565
This Air Canada deal was found by Cheapflights users on 6/7. 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.
Fri 6/129:20 pm
YUL
-
LHR
1 stop18h 40m
Air Canada
Fri 6/196:50 am
LHR
-
YUL
1 stop9h 15m
Air Canada
Deal found 6/7$566
This Air Canada deal was found by Cheapflights users on 6/9. 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.
Tue 6/168:30 pm
YUL
-
LHR
1 stop10h 20m
Air Canada
Sat 6/206:00 am
LHR
-
YUL
1 stop12h 50m
Air Canada
Deal found 6/9$567
This Air Canada deal was found by Cheapflights users on 6/8. 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.
Tue 6/93:40 pm
YUL
-
LHR
1 stop9h 55m
Air Canada
Sun 6/146:00 am
LHR
-
YUL
1 stop12h 50m
Air Canada
Deal found 6/8$569
This Lufthansa deal was found by Cheapflights users on 6/6. 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 10/84:40 pm
YUL
-
LHR
1 stop10h 55m
Lufthansa
Sun 10/189:00 am
LHR
-
YUL
1 stop14h 50m
Lufthansa
Deal found 6/6$570
This Lufthansa deal was found by Cheapflights users on 6/10. 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 9/96:55 pm
YUL
-
LHR
1 stop8h 40m
Lufthansa
Tue 9/2912:40 pm
LHR
-
YUL
1 stop10h 38m
Lufthansa
Deal found 6/10$573
This Lufthansa deal was found by Cheapflights users on 6/7. 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 9/96:40 pm
YUL
-
LHR
Nonstop6h 50m
Lufthansa
Fri 9/189:30 am
LHR
-
YUL
Nonstop7h 30m
Lufthansa
Deal found 6/7$574
This Lufthansa deal was found by Cheapflights users on 6/6. 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 9/96:55 pm
YUL
-
LHR
1 stop8h 40m
Lufthansa
Fri 9/252:05 pm
LHR
-
YUL
Nonstop7h 35m
Lufthansa
Deal found 6/6$575
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/74:40 pm
YUL
-
LHR
1 stop10h 15m
SWISS
Tue 9/298:05 pm
LHR
-
YUL
1 stop23h 55m
SWISS
Deal found 6/10$576
This SWISS deal was found by Cheapflights users on 6/8. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/174:40 pm
YUL
-
LHR
1 stop10h 15m
SWISS
Thu 9/248:45 am
LHR
-
YUL
1 stop11h 15m
SWISS
Deal found 6/8$577
This SWISS deal was found by Cheapflights users on 6/7. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/104:40 pm
YUL
-
LHR
1 stop10h 15m
SWISS
Fri 9/186:00 am
LHR
-
YUL
1 stop14h 00m
SWISS
Deal found 6/7$578
This SWISS deal was found by Cheapflights users on 6/6. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/104:40 pm
YUL
-
LHR
1 stop10h 15m
SWISS
Fri 9/256:00 am
LHR
-
YUL
1 stop14h 00m
SWISS
Deal found 6/6$579

Find flight deals from Pierre Elliott Trudeau Intl to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Pierre Elliott Trudeau Intl (YUL) 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 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$565
(Air Canada)

One-way from

$336
(Kiwi.com)

Popular in

December

Cheapest in

November

Average price

$816

Good round-trip deal

$761 or less

Good one-way deal

$804 or less
Provider with most accurate pricing for Montreal Pierre Elliott Trudeau Intl-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Montreal Pierre Elliott Trudeau Intl-London Heathrow flights.
Search Deals
From Montreal Pierre Elliott Trudeau Intl to London Heathrow
Search Deals
One-way flight from Montreal Pierre Elliott Trudeau Intl to London Heathrow
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($15 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 Montreal Pierre Elliott Trudeau Intl to London Heathrow.
Search Deals
Price to beat on a one-way flight from Montreal Pierre Elliott Trudeau Intl to London Heathrow.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pierre Elliott Trudeau Intl 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 11, 2026.
Use the filters below to find and compare flights from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 10/13

10:10 pm-10:00 am

Nonstop6h 50m

London Heathrow

Mon 10/19

2:05 pm-4:40 pm

Nonstop7h 35m

$573

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 9/2

10:10 pm-10:00 am

Nonstop6h 50m

London Heathrow

Thu 10/1

9:30 am-3:58 pm

1 stop11h 28m

$575

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 8/31

10:10 pm-10:00 am

Nonstop6h 50m

London Heathrow

Mon 9/7

9:30 am-3:25 pm

1 stop10h 55m

$661

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 8/6

10:10 pm-10:00 am

Nonstop6h 50m

London Heathrow

Mon 8/10

2:05 pm-4:40 pm

Nonstop7h 35m

$748

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 6/23

6:50 pm-10:45 am

1 stop10h 55m

London Heathrow

Wed 7/1

11:30 am-6:25 pm

1 stop11h 55m

$792

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 6/24

5:45 pm-11:10 am

1 stop12h 25m

London Heathrow

Mon 6/29

11:45 am-4:55 pm

1 stop10h 10m

$804

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 9/9

3:30 pm-10:40 am

2 stops14h 10m

London Heathrow

Wed 9/23

6:50 am-5:19 pm

2 stops15h 29m

$868

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 6/25

9:00 pm-9:25 pm

1 stop19h 25m

London Heathrow

Mon 6/29

11:30 am-11:28 pm

2 stops16h 58m

$870

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 7/17

6:00 am-9:25 pm

1 stop10h 25m

London Heathrow

Sun 8/2

6:50 am-4:10 pm

2 stops14h 20m

$881

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sun 8/16

5:00 pm-1:45 pm

1 stop15h 45m

London Heathrow

Mon 8/31

11:30 am-11:30 pm

2 stops17h 00m

$884

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

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

Compare providers for flights from Pierre Elliott Trudeau Intl 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 Pierre Elliott Trudeau Intl to Heathrow in June.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy1 starTrust Score*3 stars
Trip.comPrice Accuracy1 starTrust Score*3 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 Montreal Pierre Elliott Trudeau Intl Airport-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 Montreal Pierre Elliott Trudeau Intl Airport-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Montreal Pierre Elliott Trudeau Intl Airport-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Montreal Pierre Elliott Trudeau Intl Airport-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 Montreal Pierre Elliott Trudeau Intl Airport-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 Pierre Elliott Trudeau Intl to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Pierre Elliott Trudeau Intl 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 Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport

How far ahead should I book a flight from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport?

Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from Montreal Pierre Elliott Trudeau Intl Airport 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 Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport (average of $618). Flying from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport in December is currently the most expensive (average of $906). 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 YUL to LHR?

Find hourly flight availability from Pierre Elliott Trudeau Intl 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 11, 2026.

When flying from Montreal Pierre Elliott Trudeau Intl Airport 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.

How much does it cost to fly round-trip from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport?

The best insider tips for Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport flights

AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport trip
Our travel experts
Jessica Macdonald

Jessica Macdonald

Expert on Air Canada

Currently based in Scotland after living in South Africa and the United States, Jessica has been writing travel and aviation content for more than 10 years. She regularly contributes to Travel + Leisure and TripSavvy, and has had work published by Condé Nast Traveller and The Independent. She has traveled to more than 50 countries across six continents.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on British Airways

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
John Walton

John Walton

Expert on YUL

Independent aviation journalist John Walton took his first flight at eight weeks old and hasn’t stopped travelling since. A world-renowned expert in airlines and the passenger experience, he writes in depth on aviation, is a resident expert on travel in Japan and France, and offers a uniquely queer perspective on travelling the world.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on LHR

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

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 11, 2026.
Read reviews from past customers who have flown TAP AIR PORTUGAL,American Airlines, andAir Canada from Montreal Pierre Elliott Trudeau Intl Airport 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.
TAP AIR PORTUGAL
7.2
Good
2,274 reviews

Crew

7.8

Comfort

7.1

Boarding

7.0

Entertainment

6.3

Food

6.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Melanie,May 2026

ORD - LIS

Seat was comfortable. Food was really good. Service from crew was great. They were really nice and solicitous.
TAP AIR PORTUGAL
7.2
Good
2,274 reviews
TAP AIR PORTUGAL
7.2
Good
2,274 reviews

Crew

7.8

Comfort

7.1

Boarding

7.0

Entertainment

6.3

Food

6.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Melanie,May 2026

ORD - LIS

Seat was comfortable. Food was really good. Service from crew was great. They were really nice and solicitous.
American Airlines
7.1
Good
11,640 reviews
TAP AIR PORTUGAL
7.2
Good
2,274 reviews

Crew

7.8

Comfort

7.1

Boarding

7.0

Entertainment

6.3

Food

6.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Melanie,May 2026

ORD - LIS

Seat was comfortable. Food was really good. Service from crew was great. They were really nice and solicitous.
Air Canada
7.1
Good
11,159 reviews
TAP AIR PORTUGAL
7.2
Good
2,274 reviews

Crew

7.8

Comfort

7.1

Boarding

7.0

Entertainment

6.3

Food

6.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Melanie,May 2026

ORD - LIS

Seat was comfortable. Food was really good. Service from crew was great. They were really nice and solicitous.
Lufthansa
6.8
Okay
8,052 reviews
TAP AIR PORTUGAL
7.2
Good
2,274 reviews

Crew

7.8

Comfort

7.1

Boarding

7.0

Entertainment

6.3

Food

6.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Melanie,May 2026

ORD - LIS

Seat was comfortable. Food was really good. Service from crew was great. They were really nice and solicitous.
British Airways
6.7
Okay
8,044 reviews
TAP AIR PORTUGAL
7.2
Good
2,274 reviews

Crew

7.8

Comfort

7.1

Boarding

7.0

Entertainment

6.3

Food

6.2

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Melanie,May 2026

ORD - LIS

Seat was comfortable. Food was really good. Service from crew was great. They were really nice and solicitous.

Related info for your journey

Find useful and relevant information for your journey from Pierre Elliott Trudeau Intl to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport?

    Departing from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport will take you 6h 50m. Montreal Pierre Elliott Trudeau Intl Airport and London Heathrow Airport are separated by a distance of 3239 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines flying from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport round-trip?

    Flying on TAP AIR PORTUGAL is currently your cheapest option to London Heathrow Airport, with prices starting at $531. Additional round-trip tickets that might be worth considering are offered by Air Canada and Lufthansa, with the lowest prices starting at $545 and $551, respectively. TAP AIR PORTUGAL is 29% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the most reliable airlines from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport?

    Before booking your flight to London Heathrow Airport from Montreal Pierre Elliott Trudeau Intl Airport, check out the most reliable airlines to get you to your destination on time: Austrian Airlines (90%), United Airlines (90%), Lufthansa( 90%).

  • What are the cheapest flights from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport?

    While on average a flight from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport is generally $862, our data shows the cheapest flight currently is $648. When looking at the most popular route, (Montreal Pierre Elliott Trudeau Intl - London Heathrow), you can expect to pay $573 for that flight.

  • Can I find deals for flights from Pierre Elliott Trudeau Intl to Heathrow that include hotel bookings?

    Yes. In addition to deals on Pierre Elliott Trudeau Intl to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pierre Elliott Trudeau Intl to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pierre Elliott Trudeau Intl to Heathrow.

  • Can I find deals for business class flights from Pierre Elliott Trudeau Intl to Heathrow?

    Yes. Cheapflights offers flight deals from Pierre Elliott Trudeau Intl 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 Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport (average of $618). Flying from Montreal Pierre Elliott Trudeau Intl Airport to London Heathrow Airport in December is currently the most expensive (average of $906). 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.

Top 5 airlines flying from Pierre Elliott Trudeau Intl to Heathrow

Discover the top 5 airlines that operate flights from Pierre Elliott Trudeau Intl 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 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapest$531Average$826FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$545Average$786FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$551Average$789FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$608Average$884FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$610Average$816FlexibilityNo cancel feeOn-time71%

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.