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Cheap flights from Montreal to London Heathrow Airport from C$ 365

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 13/10. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
3 Aug — 10 Aug1
1 adult

Cheapflights Tip: The best prices from Montreal to London Heathrow are usually found in September or May, booked 45 days in advance, depart on a Sunday or Friday and return on a Wednesday

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 July 2025.

Round-trip from

C$ 738

One-way from

C$ 365

Popular in

December

Cheapest in

September

Average price

C$ 1,165

Good round-trip deal

C$ 970 or less

Good one-way deal

C$ 707 or less
Air Canada
  • Air Canada
  • 6/9-23/9
  • 2 total stops
  • 24h 00m total
  • Montreal to London
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TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 13/10
  • 1 total stop
  • 19h 10m total
  • Montreal to London
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Highest demand for flights based on searches. 4% potential increase in price (C$ 62 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 34 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Montreal (YMQ) to London Heathrow.
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Price to beat on a one-way flight from Montreal (YMQ) to London Heathrow.
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Find flight deals from Montreal to Heathrow

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 July 2025.

Sat 6/99:55 p.m.YUL - LHR
Nonstop6h 40mAir Canada
Tue 23/96:00 a.m.LHR - YUL
2 stops17h 20mAir Canada
Deal found 27/7C$ 738
Fri 19/94:00 p.m.YUL - LHR
1 stop13h 00mMultiple Airlines
Fri 10/109:00 a.m.LHR - YUL
1 stop17h 00mMultiple Airlines
Deal found 28/7C$ 742
Tue 30/95:10 p.m.YUL - LHR
1 stop11h 50mLufthansa
Tue 14/1010:50 a.m.LHR - YUL
1 stop13h 00mLufthansa
Deal found 28/7C$ 744
Wed 3/124:45 p.m.YUL - LHR
1 stop10h 20mSWISS
Sat 6/125:10 p.m.LHR - YUL
1 stop27h 00mSWISS
Deal found 29/7C$ 756
Mon 3/118:40 p.m.YUL - LHR
Nonstop6h 50mBritish Airways
Tue 4/114:10 p.m.LHR - YUL
Nonstop7h 35mBritish Airways
Deal found 29/7C$ 757
Sat 4/1010:05 p.m.YUL - LHR
Nonstop6h 40mAmerican Airlines
Sat 11/106:05 p.m.LHR - YUL
Nonstop7h 10mAmerican Airlines
Deal found 27/7C$ 779
Mon 29/91:30 p.m.YUL - LHR
1 stop15h 30mAustrian Airlines
Sat 4/103:05 p.m.LHR - YUL
2 stops26h 00mAustrian Airlines
Deal found 28/7C$ 794

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 July 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

Sat 6/9

9:55 p.m.-9:35 a.m.

Nonstop6h 40m

London Heathrow

Tue 23/9

6:00 a.m.-6:20 p.m.

2 stops17h 20m

C$ 738

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 19/9

4:00 p.m.-10:00 a.m.

1 stop13h 00m

London Heathrow

Fri 10/10

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

1 stop17h 00m

C$ 742

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

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

1 stop11h 50m

London Heathrow

Tue 14/10

10:50 a.m.-6:50 p.m.

1 stop13h 00m

C$ 744

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Wed 3/12

4:45 p.m.-8:05 a.m.

1 stop10h 20m

London Heathrow

Sat 6/12

5:10 p.m.-3:10 p.m.

1 stop27h 00m

C$ 756

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 3/11

8:40 p.m.-8:30 a.m.

Nonstop6h 50m

London Heathrow

Fri 7/11

4:10 p.m.-6:45 p.m.

Nonstop7h 35m

C$ 757

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Sat 4/10

10:05 p.m.-9:45 a.m.

Nonstop6h 40m

London Heathrow

Sat 11/10

6:05 p.m.-8:15 p.m.

Nonstop7h 10m

C$ 779

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 29/9

1:30 p.m.-10:00 a.m.

1 stop15h 30m

London Heathrow

Sat 4/10

3:05 p.m.-12:05 p.m.

2 stops26h 00m

C$ 794

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 13/10

10:45 p.m.-10:55 p.m.

1 stop19h 10m

C$ 365

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 3/10

11:00 p.m.-2:15 p.m.

1 stop10h 15m

C$ 398

Flights are sorted by cheapest round-trip flights first.

Deals found on 29/7

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 25 July 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 39 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$ 560). Flying from Montreal to London Heathrow Airport in July is currently the most expensive (average of C$ 857). 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 July 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 31% 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 15 September 2024.

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

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 29 July 2025.

The most flights from YMQ to LHR are scheduled on a Tuesday (18 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (8 on average).

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 52% 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$ 739.

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 Paris (CDG) have the shortest average one-way travel time for 1-stop routes: 3h 29m.

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 Paris (CDG) offer the fastest connection on this route, with an average layover time of 1h 56m.

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 July 2025.
Get a feel of what it's like to fly with Austrian Airlines,SWISS, andAmerican Airlines 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.
Austrian Airlines
7.6
Good
821 reviews
Check prices

Comfort

7.3

Entertainment

6.8

Crew

8.1

Boarding

7.6

Food

6.8

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Austrian Airlines
7.6
Good
821 reviews
Austrian Airlines
7.6
Good
821 reviews
Check prices

Comfort

7.3

Entertainment

6.8

Crew

8.1

Boarding

7.6

Food

6.8

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
SWISS
7.5
Good
1,683 reviews
Austrian Airlines
7.6
Good
821 reviews
Check prices

Comfort

7.3

Entertainment

6.8

Crew

8.1

Boarding

7.6

Food

6.8

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
American Airlines
7.2
Good
10,000 reviews
Austrian Airlines
7.6
Good
821 reviews
Check prices

Comfort

7.3

Entertainment

6.8

Crew

8.1

Boarding

7.6

Food

6.8

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
Air Canada
7.1
Good
9,822 reviews
Austrian Airlines
7.6
Good
821 reviews
Check prices

Comfort

7.3

Entertainment

6.8

Crew

8.1

Boarding

7.6

Food

6.8

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time
TAP AIR PORTUGAL
7.1
Good
1,929 reviews
Austrian Airlines
7.6
Good
821 reviews
Check prices

Comfort

7.3

Entertainment

6.8

Crew

8.1

Boarding

7.6

Food

6.8

Overall

7.6

Reviews

1 / 20
10.0
Excellent

Dominik,Jun 2025

VIE - VNO

Good service and update all information. I feel like i wanna use it again next time

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.

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

    Currently priced at C$ 738, Air Canada will fly you from Montreal to London Heathrow Airport and back. In addition to Air Canada, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Lufthansa and SWISS - these airlines can fly you to your destination from C$ 744 and C$ 756, respectively. Air Canada is 27% 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 Austrian Airlines (88%), United Airlines (88%) and Lufthansa (88%).

  • 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$ 2,107, our data indicates the cheapest price to be C$ 433. The most popular route (Montreal Pierre Elliott Trudeau Intl - London Heathrow), is priced around C$ 654.

  • 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$ 560). Flying from Montreal to London Heathrow Airport in July is currently the most expensive (average of C$ 857). 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
Brentford
Sutton
Hounslow
Slough
Marlow
Leamington Spa
Milton Keynes
Romford
Watford
Bromley
Luton
Bedford
Southall

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 29 July 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 10 airlines flying from Montreal to Heathrow

Discover the top 10 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 July 2025.
AirlineCheapestAverageFlexibilityOn-time
TAP AIR PORTUGALCheapestC$ 627AverageC$ 697FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air TransatCheapestC$ 689AverageC$ 1,008FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapestC$ 744AverageC$ 989FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 757AverageC$ 999FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapestC$ 763AverageC$ 858FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapestC$ 784AverageC$ 1,050FlexibilityNo cancel feeOn-time70%
Search British Airways flights
KLMCheapestC$ 798AverageC$ 1,027FlexibilityNo cancel feeOn-time75%
Search KLM flights
Air FranceCheapestC$ 811AverageC$ 909FlexibilityNo cancel feeOn-time77%
Search Air France flights
American AirlinesCheapestC$ 917AverageC$ 1,121FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
FinnairCheapestC$ 959AverageC$ 1,001FlexibilityNo 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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