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Cheap flights from Montreal to London Heathrow Airport from C$ 363

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 24/10. Fares are subject to change and may not be available on all flights or dates of travel.
YMQ — LHR
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheapflights Tip: The best prices from Montreal to London Heathrow are usually found in May or November, booked 45 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 15 September 2025.

Round-trip from

C$ 739

One-way from

C$ 363

Popular in

December

Cheapest in

May

Average price

C$ 974

Good round-trip deal

C$ 788 or less

Good one-way deal

C$ 993 or less
Air Canada
  • Air Canada
  • 29/10-5/11
  • 2 total stops
  • 19h 50m total
  • Montreal to London
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TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 24/10
  • 1 total stop
  • 19h 10m total
  • Montreal to London
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (C$ 45 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease (C$ 31 potential savings vs. average RT price).
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Average for round-trip flights in September 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 15 September 2025.

Wed 29/107:55 a.m.YUL - LHR
1 stop8h 40mAir Canada
Wed 5/119:00 a.m.LHR - YUL
1 stop11h 10mAir Canada
Deal found 14/9C$ 739
Wed 19/119:45 p.m.YUL - LHR
1 stop14h 45mTAP AIR PORTUGAL
Tue 9/126:30 p.m.LHR - YUL
1 stop30h 45mTAP AIR PORTUGAL
Deal found 13/9C$ 743
Tue 28/107:55 a.m.YUL - LHR
1 stop8h 40mAir Canada
Tue 4/116:50 a.m.LHR - YUL
1 stop9h 55mAir Canada
Deal found 13/9C$ 760
Mon 6/109:40 a.m.YUL - LHR
1 stop15h 50mAir Canada
Tue 14/106:50 a.m.LHR - YUL
1 stop9h 45mAir Canada
Deal found 14/9C$ 763
Mon 13/108:05 p.m.YUL - LHR
1 stop19h 55mMultiple Airlines
Mon 20/107:30 p.m.LHR - YUL
1 stop23h 20mMultiple Airlines
Deal found 14/9C$ 772
Wed 1/106:55 p.m.YUL - LHR
Nonstop6h 35mMultiple Airlines
Wed 8/106:50 a.m.LHR - YUL
1 stop9h 45mMultiple Airlines
Deal found 14/9C$ 774

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 September 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 2/3

7:35 p.m.-7:10 a.m.

Nonstop6h 35m

London Heathrow

Tue 10/3

1:25 p.m.-4:35 p.m.

Nonstop7h 10m

C$ 858

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 20/10

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

Nonstop6h 40m

London Heathrow

Thu 30/10

1:25 p.m.-5:10 p.m.

Nonstop7h 45m

C$ 858

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 28/10

1:10 p.m.-10:50 a.m.

2 stops17h 40m

London Heathrow

Sun 9/11

11:05 a.m.-11:30 a.m.

2 stops53h 25m

C$ 883

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 7/10

5:00 p.m.-8:00 a.m.

1 stop10h 00m

London Heathrow

Fri 24/10

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

1 stop15h 25m

C$ 907

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Thu 9/10

9:15 a.m.-6:45 a.m.

2 stops16h 30m

London Heathrow

Wed 22/10

6:50 a.m.-3:00 p.m.

2 stops37h 10m

C$ 915

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 17/10

1:15 p.m.-6:45 a.m.

1 stop12h 30m

London Heathrow

Mon 27/10

6:50 a.m.-7:32 a.m.

2 stops28h 42m

C$ 915

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Fri 26/9

8:30 a.m.-5:55 a.m.

2 stops16h 25m

London Heathrow

Mon 6/10

6:50 a.m.-5:00 p.m.

2 stops15h 10m

C$ 915

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 30/9

8:20 a.m.-8:20 a.m.

1 stop19h 00m

London Heathrow

Sat 4/10

6:50 a.m.-7:19 p.m.

2 stops17h 29m

C$ 915

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Mon 2/3

4:55 p.m.-8:45 a.m.

1 stop10h 50m

London Heathrow

Mon 16/3

8:40 a.m.-6:20 p.m.

1 stop13h 40m

C$ 920

MontrealLondon

YUL - LHR

YULLHR

Montreal Pierre Elliott Trudeau Intl

Tue 21/10

4:40 p.m.-10:40 a.m.

2 stops13h 00m

London Heathrow

Wed 29/10

8:00 a.m.-6:25 p.m.

2 stops14h 25m

C$ 925

Flights are sorted by cheapest round-trip flights first.

Deals found on 13/9

Showing 1-10 of 23 results
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2
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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 12 September 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 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, 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$ 856). 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 September 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 30% 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 15 September 2025.

The most flights from YMQ to LHR are scheduled on a Friday (18 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (6 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.

Paris (CDG) – chosen by Cheapflights users on 49% 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$ 781.

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 15 September 2025.
Get a feel of what it's like to fly with Virgin Atlantic,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.
Virgin Atlantic
7.4
Good
664 reviews
Check prices

Crew

8.1

Food

6.9

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.4
Good
664 reviews
Virgin Atlantic
7.4
Good
664 reviews
Check prices

Crew

8.1

Food

6.9

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
American Airlines
7.2
Good
10,000 reviews
Virgin Atlantic
7.4
Good
664 reviews
Check prices

Crew

8.1

Food

6.9

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Air Canada
7.1
Good
10,000 reviews
Virgin Atlantic
7.4
Good
664 reviews
Check prices

Crew

8.1

Food

6.9

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Lufthansa
6.8
Okay
7,409 reviews
Virgin Atlantic
7.4
Good
664 reviews
Check prices

Crew

8.1

Food

6.9

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
British Airways
6.7
Okay
7,361 reviews
Virgin Atlantic
7.4
Good
664 reviews
Check prices

Crew

8.1

Food

6.9

Overall

7.4

Boarding

7.7

Comfort

7.3

Entertainment

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

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 10h 34m. Lufthansa provides one of the quickest options available for as low as C$ 879. 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$ 610, 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$ 632 and C$ 634, 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 American Airlines (70%), Aer Lingus (70%) and Finnair (70%).

  • 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$ 2,251, our data indicates the cheapest price to be C$ 399. The most popular route (Montreal Pierre Elliott Trudeau Intl - London Heathrow), is priced around C$ 671.

  • 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$ 856). 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
Bedford
Luton
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 15 September 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 15 September 2025.
AirlineCheapestAverageFlexibilityOn-time
Air FranceCheapestC$ 610AverageC$ 960FlexibilityNo cancel feeOn-time77%
Search Air France flights
TAP AIR PORTUGALCheapestC$ 632AverageC$ 714FlexibilityNo cancel feeOn-timeN/A
Search TAP AIR PORTUGAL flights
Air TransatCheapestC$ 634AverageC$ 1,005FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
Air CanadaCheapestC$ 758AverageC$ 1,003FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
LufthansaCheapestC$ 761AverageC$ 1,002FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
Virgin AtlanticCheapestC$ 770AverageC$ 879FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapestC$ 774AverageC$ 1,060FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapestC$ 793AverageC$ 1,108FlexibilityNo cancel feeOn-time71%
Search American Airlines flights
KLMCheapestC$ 805AverageC$ 1,037FlexibilityNo cancel feeOn-time75%
Search KLM flights
FinnairCheapestC$ 864AverageC$ 1,031FlexibilityNo 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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