Find flights
Deals
When to book
Airlines
FAQs

Cheap flights from Montreal to London Heathrow Airport from C$ 442

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 23/11. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
28 Nov — 5 Dec1
1 adult
1 adult, Economy, 0 bags

Cheapflights Tip: The best prices from Montreal to London Heathrow are usually found in November or March, booked 20 days in advance, depart on a Sunday or Friday and return on a Saturday

Cheap flight deals from Montreal to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Montreal (YMQ) 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 29 October 2025.

Round-trip from

C$ 773

One-way from

C$ 442

Popular in

December

Cheapest in

November

Average price

C$ 982

Good round-trip deal

C$ 948 or less

Good one-way deal

C$ 802 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 16/1-20/1
  • 2 total stops
  • 49h 35m total
  • Montreal to London
Search Deals
WestJet
  • WestJet
  • 23/11
  • 2 total stops
  • 25h 05m total
  • Montreal to London
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 51 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Montreal (YMQ) to London Heathrow.
Search Deals
Price to beat on a one-way flight from Montreal (YMQ) to London Heathrow.
Search Deals

Find flight deals from Montreal to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Montreal to Heathrow
Explore the most affordable flight options available from Montreal to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 29 October 2025.

Mon 24/114:45 p.m.YUL - LHR
1 stop15h 15mSWISS
Mon 1/129:00 a.m.LHR - YUL
1 stop11h 10mSWISS
Deal found 26/10C$ 777
Thu 13/111:15 p.m.YUL - LHR
1 stop26h 20mAir Canada
Wed 19/119:00 a.m.LHR - YUL
1 stop11h 10mAir Canada
Deal found 29/10C$ 784
Sun 30/119:45 p.m.YUL - LHR
1 stop14h 45mTAP AIR PORTUGAL
Mon 8/126:00 a.m.LHR - YUL
1 stop19h 15mTAP AIR PORTUGAL
Deal found 27/10C$ 787
Mon 1/129:45 p.m.YUL - LHR
1 stop14h 45mTAP AIR PORTUGAL
Sun 7/1212:25 p.m.LHR - YUL
1 stop12h 50mTAP AIR PORTUGAL
Deal found 27/10C$ 788
Wed 19/114:45 p.m.YUL - LHR
1 stop18h 35mSWISS
Thu 27/119:00 a.m.LHR - YUL
1 stop11h 10mSWISS
Deal found 28/10C$ 791
Fri 5/129:45 p.m.YUL - LHR
1 stop19h 55mTAP AIR PORTUGAL
Sun 7/128:15 a.m.LHR - YUL
1 stop17h 00mTAP AIR PORTUGAL
Deal found 27/10C$ 794
Sun 30/117:10 p.m.YUL - LHR
Nonstop7h 00mAir Canada
Thu 4/129:00 a.m.LHR - YUL
1 stop11h 10mAir Canada
Deal found 29/10C$ 795
Sun 7/129:45 p.m.YUL - LHR
1 stop19h 55mTAP AIR PORTUGAL
Sat 13/127:55 p.m.LHR - YUL
1 stop29h 20mTAP AIR PORTUGAL
Deal found 27/10C$ 796
Mon 1/129:45 p.m.YUL - LHR
1 stop14h 45mTAP AIR PORTUGAL
Tue 9/126:30 p.m.LHR - YUL
1 stop30h 45mTAP AIR PORTUGAL
Deal found 28/10C$ 798
Fri 21/119:45 p.m.YUL - LHR
1 stop17h 50mMultiple Airlines
Fri 28/119:00 a.m.LHR - YUL
1 stop11h 10mMultiple Airlines
Deal found 26/10C$ 802
Wed 3/127:30 p.m.YUL - LHR
Nonstop6h 40mAir Canada
Wed 10/129:00 a.m.LHR - YUL
1 stop11h 10mAir Canada
Deal found 27/10C$ 803

Cheapflights Fare Finder

 
Customize your flight search to find flights from Montreal 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 29 October 2025.
Use the filters below to find and compare flights from Montreal to London Heathrow Airport that are best for you.

Fly from

Montreal

Fly to

Heathrow

Route

Depart

Return

Price

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 17/11

5:10 p.m.-11:20 a.m.

1 stop13h 10m

London Heathrow

Mon 24/11

7:40 a.m.-6:20 p.m.

1 stop15h 40m

C$ 834

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sat 31/1

3:10 p.m.-8:30 a.m.

1 stop12h 20m

London Heathrow

Mon 2/3

7:40 a.m.-6:20 p.m.

1 stop15h 40m

C$ 844

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 11/12

7:30 p.m.-7:10 a.m.

Nonstop6h 40m

London Heathrow

Mon 15/12

1:25 p.m.-4:10 p.m.

Nonstop7h 45m

C$ 845

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 17/11

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

Nonstop7h 00m

London Heathrow

Sun 23/11

1:25 p.m.-4:10 p.m.

Nonstop7h 45m

C$ 845

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 27/11

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

Nonstop7h 00m

London Heathrow

Sun 7/12

1:25 p.m.-4:10 p.m.

Nonstop7h 45m

C$ 845

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sat 6/12

3:10 p.m.-6:30 a.m.

1 stop10h 20m

London Heathrow

Sat 13/12

1:25 p.m.-4:10 p.m.

Nonstop7h 45m

C$ 854

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 17/11

5:10 p.m.-11:20 a.m.

1 stop13h 10m

London Heathrow

Tue 25/11

1:25 p.m.-4:10 p.m.

Nonstop7h 45m

C$ 855

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 2/12

7:30 p.m.-7:10 a.m.

Nonstop6h 40m

London Heathrow

Fri 5/12

8:15 p.m.-12:00 p.m.

2 stops20h 45m

C$ 882

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 13/11

2:00 p.m.-6:30 a.m.

1 stop11h 30m

London Heathrow

Fri 21/11

8:15 p.m.-11:45 a.m.

2 stops20h 30m

C$ 884

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 17/11

5:10 p.m.-1:00 p.m.

2 stops14h 50m

London Heathrow

Mon 24/11

6:00 a.m.-3:10 p.m.

1 stop14h 10m

C$ 889

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 21 results
1
2
3

Best time to book a flight from Montreal to Heathrow

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

How far ahead should I book a flight from Montreal to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Montreal to Heathrow. Price data was last updated on 24 October 2025.

The price you pay for your flight from Montreal to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 20 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Montreal to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Montreal to London Heathrow Airport (average of C$ 701). Flying from Montreal to London Heathrow Airport in July is currently the most expensive (average of C$ 1,005). 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 YMQ to LHR?

Find hourly flight availability from Montreal 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 29 October 2025.

When flying from Montreal to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 21% versus a flight in the evening.

What is the cheapest day to fly from Montreal to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from Montreal to Heathrow. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Montreal to London Heathrow Airport flight should consider departing on Friday at noon when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

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

What’s the top layover airport for flights from Montreal to London Heathrow Airport?

Share of one-stop round-trip flights from Montreal to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.

Paris (CDG) – chosen by Cheapflights users on 43% of one-stop itineraries from Montreal to London Heathrow Airport on Cheapflights.

What’s the cheapest layover airport for flights from Montreal to London Heathrow Airport?

Average round-trip fare for 1-stop flights from Montreal to London Heathrow Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Lisbon (LIS) is the most affordable 1-stop option, with an average round-trip price of C$ 779.

What’s the fastest layover option from Montreal to London Heathrow Airport?

Shortest average travel time for 1-stop one-way flights from Montreal to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Ottawa (YOW) have the shortest average one-way travel time for 1-stop routes: 9h 00m.

Which airport typically offers the quickest layover for flights from Montreal to London Heathrow Airport?

Average layover duration for 1-stop one-way flights from Montreal to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Newark (EWR) offer the fastest connection on this route, with an average layover time of 1h 20m.

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 29 October 2025.
Get a feel of what it's like to fly with Finnair,American Airlines, andAir Canada from Montreal to London Heathrow Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,333 reviews
Check prices

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
Finnair
7.6
Good
1,333 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
American Airlines
7.2
Good
11,032 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
Air Canada
7.1
Good
10,372 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
Lufthansa
6.8
Okay
7,540 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.
British Airways
6.7
Okay
7,487 reviews
Finnair
7.6
Good
1,333 reviews
Check prices

Entertainment

6.9

Food

6.7

Crew

8.1

Overall

7.6

Boarding

7.6

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Daniel,May 2025

HEL - ARN

This is a very short flight. The crew was all very friendly and helpful. The plane was clean and nice. By the time you're in the air, you're starting to descend. It's painless.

Related info for your journey

Find useful and relevant information for your journey from Montreal 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 to London Heathrow Airport?

    A quick flight from Montreal to London Heathrow Airport can take about 13h 10m. Lufthansa provides one of the quickest options available for as low as C$ 834. Montreal and London Heathrow Airport are separated by a distance of 5213 km.

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

    Currently priced at C$ 616, Air France will fly you from Montreal to London Heathrow Airport and back. In addition to Air France, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from TAP AIR PORTUGAL and Air Transat - these airlines can fly you to your destination from C$ 638 and C$ 640, respectively. Air France is 40% cheaper than the average price of flights available within the next 90 days to this destination.

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

    The top 3 most reliable airlines when flying from Montreal to London Heathrow Airport are Aegean Airlines (77%), Thai Airways (77%) and Air Canada (72%).

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

    Looking for the cheapest flight from Montreal to London Heathrow Airport? While on average our users pay C$ 2,195, our data indicates the cheapest price to be C$ 434. The most popular route (Montreal Pierre Elliott Trudeau Intl - London Heathrow), is priced around C$ 657.

  • Can I find deals for flights from Montreal to Heathrow that include hotel bookings?

    Yes. In addition to deals on Montreal to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Montreal to Heathrow?

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

  • Can I find deals for business class flights from Montreal to Heathrow?

    Yes. Cheapflights offers flight deals from Montreal 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 to London Heathrow Airport?

    Currently, January is the cheapest month in which you can book a flight from Montreal to London Heathrow Airport (average of C$ 701). Flying from Montreal to London Heathrow Airport in July is currently the most expensive (average of C$ 1,005). 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
Sutton
Hounslow
Slough
Marlow
Leamington Spa
Milton Keynes
Romford
Watford
Bedford
Luton
Stratford-upon-Avon
Gatwick

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 Montreal to Heathrow on these airlines

Choose from the following airlines for your flight from Montreal to Heathrow. Flights are based on user searches made on Cheapflights and were last updated on 29 October 2025.
Air Canada flights from Montreal to London Heathrow
British Airways flights from Montreal to London Heathrow
Lufthansa flights from Montreal to London Heathrow

Top 9 airlines flying from Montreal to Heathrow

Discover the top 9 airlines that operate flights from Montreal 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 29 October 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapestC$ 616AverageC$ 1,115FlexibilityNo cancel feeOn-time77%
Search Air France flights
TAP AIR PORTUGALCheapestC$ 638AverageC$ 721FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air TransatCheapestC$ 640AverageC$ 1,021FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
LufthansaCheapestC$ 767AverageC$ 1,016FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air CanadaCheapestC$ 767AverageC$ 1,027FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapestC$ 768AverageC$ 1,066FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapestC$ 800AverageC$ 1,098FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Virgin AtlanticCheapestC$ 802AverageC$ 1,102FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapestC$ 872AverageC$ 1,020FlexibilityNo cancel feeOn-time76%
Search Finnair 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 Montreal to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Montreal to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Montreal to Heathrow?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Heathrow from Montreal.

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

Need flexible booking options for your flight to Heathrow from Montreal? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Montreal 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.