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Cheap flights from Montreal to London Heathrow Airport from C$ 431

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 2/9. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
14 Apr — 21 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from Montreal to London Heathrow are usually found in November or October, booked 45 days in advance, depart on a Sunday or Saturday and return on a Saturday

Cheap 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 15 March 2026.

Mon 1/610:45 p.m.
YUL
-
LHR
1 stop15h 05m
TAP AIR PORTUGAL
Sun 14/61:45 p.m.
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 13/3C$ 744
Sun 14/610:45 p.m.
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Wed 24/611:20 a.m.
LHR
-
YUL
1 stop14h 25m
TAP AIR PORTUGAL
Deal found 10/3C$ 745
Mon 1/610:45 p.m.
YUL
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Sun 7/61:45 p.m.
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 12/3C$ 746
Sun 31/510:45 p.m.
YUL
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Tue 9/67:50 p.m.
LHR
-
YUL
1 stop29h 55m
TAP AIR PORTUGAL
Deal found 14/3C$ 749
Wed 20/510:45 p.m.
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Wed 3/61:45 p.m.
LHR
-
YUL
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 11/3C$ 750
Fri 22/510:45 p.m.
YUL
-
LHR
1 stop15h 05m
TAP AIR PORTUGAL
Wed 3/61:45 p.m.
LHR
-
YUL
1 stop12h 00m
TAP AIR PORTUGAL
Deal found 11/3C$ 752
Wed 3/610:45 p.m.
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Thu 11/61:45 p.m.
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 15/3C$ 753
Sun 24/510:45 p.m.
YUL
-
LHR
1 stop19h 10m
TAP AIR PORTUGAL
Thu 4/67:50 p.m.
LHR
-
YUL
1 stop30h 20m
TAP AIR PORTUGAL
Deal found 13/3C$ 755
Wed 3/610:45 p.m.
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Sat 20/66:45 p.m.
LHR
-
YUL
1 stop31h 25m
TAP AIR PORTUGAL
Deal found 12/3C$ 756
Sun 31/510:45 p.m.
YUL
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Thu 11/61:45 p.m.
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 15/3C$ 757
Sun 24/510:45 p.m.
YUL
-
LHR
1 stop19h 10m
TAP AIR PORTUGAL
Sat 6/67:50 p.m.
LHR
-
YUL
1 stop30h 20m
TAP AIR PORTUGAL
Deal found 13/3C$ 759
Fri 22/510:45 p.m.
YUL
-
LHR
1 stop15h 05m
TAP AIR PORTUGAL
Mon 1/61:45 p.m.
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Deal found 13/3C$ 760

Find 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 15 March 2026.

Round-trip from

C$ 744

One-way from

C$ 431

Popular in

December

Cheapest in

November

Average price

C$ 981

Good round-trip deal

C$ 1,040 or less

Good one-way deal

C$ 911 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 1/6-14/6
  • 2 total stops
  • 27h 30m total
  • Montreal to London
Search Deals
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 2/9
  • 1 total stop
  • 15h 05m total
  • Montreal to London
Search Deals
Highest demand for flights based on searches. 4% potential increase in price (C$ 58 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 38 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 Montreal (YMQ) to London Heathrow.
Search Deals
Price to beat on a one-way flight from Montreal (YMQ) to London Heathrow.
Search Deals

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 12/6

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

1 stop14h 00m

London Heathrow

Fri 26/6

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

2 stops17h 12m

C$ 1,066
Quickest round-trip

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 2/7

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

Nonstop6h 50m

London Heathrow

Wed 15/7

9:30 a.m.-12:00 p.m.

Nonstop7h 30m

C$ 1,199

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 8/9

9:45 a.m.-5:55 a.m.

2 stops15h 10m

London Heathrow

Tue 15/9

9:30 a.m.-7:45 p.m.

2 stops15h 15m

C$ 1,210

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 22/5

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

1 stop14h 00m

London Heathrow

Tue 26/5

6:00 a.m.-8:17 p.m.

2 stops19h 17m

C$ 1,240

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 28/4

6:45 a.m.-6:55 a.m.

2 stops19h 10m

London Heathrow

Wed 13/5

7:25 a.m.-10:06 p.m.

2 stops19h 41m

C$ 1,248

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 9/4

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

Nonstop6h 50m

London Heathrow

Tue 14/4

9:30 a.m.-12:05 p.m.

Nonstop7h 35m

C$ 1,264

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 19/6

6:40 p.m.-6:30 a.m.

Nonstop6h 50m

London Heathrow

Sun 12/7

9:30 a.m.-12:00 p.m.

Nonstop7h 30m

C$ 1,264

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 26/3

6:00 p.m.-1:45 p.m.

1 stop15h 45m

London Heathrow

Thu 2/4

6:30 a.m.-4:55 p.m.

1 stop15h 25m

C$ 1,279

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sat 4/4

6:00 a.m.-7:10 a.m.

1 stop20h 10m

London Heathrow

Sun 12/4

6:55 p.m.-1:39 p.m.

2 stops23h 44m

C$ 1,371

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 30/6

8:40 a.m.-5:55 a.m.

2 stops16h 15m

London Heathrow

Fri 17/7

11:05 a.m.-7:08 p.m.

1 stop13h 03m

C$ 1,373

Flights are sorted by cheapest round-trip flights first.

Deals found on 14/3

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

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 45 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, November is the cheapest month in which you can book a flight from Montreal to London Heathrow Airport (average of C$ 613). Flying from Montreal to London Heathrow Airport in July is currently the most expensive (average of C$ 937). 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 15 March 2026.

When flying from Montreal 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.

Weekly flight availability from Montreal to London Heathrow Airport

Explore weekly flight availability from Montreal to Heathrow. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 15 March 2026.

The most flights from YMQ to LHR are scheduled on a Friday (13 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (9 on average).

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.

Lisbon (LIS) – chosen by Cheapflights users on 47% 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$ 690.

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.

How often are flights from Montreal to London delayed?

About 23% of weekly flights between Montreal and London have experienced delays in the past year, with the average delay time being 156 minutes.

What is the most punctual flight time for Montreal to London flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Montreal to London flights?

Over the past year, Air Canada has had the lowest number of delays on this route, with just 22% of flights being delayed.

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 15 March 2026.
Get a feel of what it's like to fly with American Airlines,Air Canada, andLufthansa 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.
American Airlines
7.1
Good
11,471 reviews
Check prices

Comfort

7.2

Crew

7.9

Entertainment

6.9

Overall

7.1

Boarding

7.5

Food

6.4

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
American Airlines
7.1
Good
11,471 reviews
American Airlines
7.1
Good
11,471 reviews
Check prices

Comfort

7.2

Crew

7.9

Entertainment

6.9

Overall

7.1

Boarding

7.5

Food

6.4

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
Air Canada
7.1
Good
10,803 reviews
American Airlines
7.1
Good
11,471 reviews
Check prices

Comfort

7.2

Crew

7.9

Entertainment

6.9

Overall

7.1

Boarding

7.5

Food

6.4

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
Lufthansa
6.8
Okay
7,850 reviews
American Airlines
7.1
Good
11,471 reviews
Check prices

Comfort

7.2

Crew

7.9

Entertainment

6.9

Overall

7.1

Boarding

7.5

Food

6.4

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.
British Airways
6.7
Okay
7,792 reviews
American Airlines
7.1
Good
11,471 reviews
Check prices

Comfort

7.2

Crew

7.9

Entertainment

6.9

Overall

7.1

Boarding

7.5

Food

6.4

Reviews

1 / 20
4.0
Okay

Cameron,Nov 2025

PDX - LHR

The plane was very old...had no WiFi available. The crew were not friendly nor helpful.

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 6h 50m. TAP AIR PORTUGAL provides one of the quickest options available for as low as C$ 1,199. Montreal and London Heathrow Airport are separated by a distance of 5213 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Currently priced at C$ 676, TAP AIR PORTUGAL will fly you from Montreal to London Heathrow Airport and back. In addition to TAP AIR PORTUGAL, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Air Transat and British Airways - these airlines can fly you to your destination from C$ 689 and C$ 727, respectively. TAP AIR PORTUGAL is 32% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Montreal to London Heathrow Airport one-way?

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as C$ 389. However, be on the lookout for offers from Lufthansa and Finnair, as they are both options that can get you from Montreal to London Heathrow Airport for a low price.

  • 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%), Egyptair (65%) and Thai Airways (65%).

  • 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$ 1,407, our data indicates the cheapest price to be C$ 857. The most popular route (Montreal Pierre Elliott Trudeau Intl - London Heathrow), is priced around C$ 716.

  • 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, November is the cheapest month in which you can book a flight from Montreal to London Heathrow Airport (average of C$ 613). Flying from Montreal to London Heathrow Airport in July is currently the most expensive (average of C$ 937). 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

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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 15 March 2026.
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 15 March 2026.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapestC$ 676AverageC$ 733FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air TransatCheapestC$ 689AverageC$ 985FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
British AirwaysCheapestC$ 723AverageC$ 1,018FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Air CanadaCheapestC$ 746AverageC$ 1,023FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 752AverageC$ 1,021FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Air FranceCheapestC$ 760AverageC$ 1,196FlexibilityNo cancel feeOn-time77%
Search Air France flights
American AirlinesCheapestC$ 772AverageC$ 988FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
Virgin AtlanticCheapestC$ 787AverageC$ 1,084FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
FinnairCheapestC$ 935AverageC$ 1,125FlexibilityNo 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!

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