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Cheap flights from London Heathrow Airport to Montreal from £323

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 17/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — YMQ
25 Mar — 1 Apr1
1 adult
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from London Heathrow to Montreal are usually found in September or June, booked 84 days in advance, depart on a Wednesday or Friday and return on a Sunday

Cheap flight deals from Heathrow to Montreal

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Montreal
Explore the most affordable flight options available from Heathrow to Montreal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 February 2026.

Thu 11/613:45
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Sun 14/622:45
YUL
-
LHR
1 stop18h 15m
TAP AIR PORTUGAL
Deal found 22/2£379
Mon 1/611:20
LHR
-
YUL
1 stop14h 50m
TAP AIR PORTUGAL
Wed 10/622:45
YUL
-
LHR
1 stop14h 00m
TAP AIR PORTUGAL
Deal found 21/2£383
Mon 1/611:20
LHR
-
YUL
1 stop14h 50m
TAP AIR PORTUGAL
Wed 17/622:45
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Deal found 20/2£383
Thu 4/619:50
LHR
-
YUL
1 stop30h 20m
TAP AIR PORTUGAL
Thu 11/622:45
YUL
-
LHR
1 stop18h 20m
TAP AIR PORTUGAL
Deal found 20/2£384
Wed 3/606:00
LHR
-
YUL
1 stop19h 45m
TAP AIR PORTUGAL
Sun 7/622:45
YUL
-
LHR
1 stop15h 05m
TAP AIR PORTUGAL
Deal found 21/2£386
Sat 14/312:00
LHR
-
YUL
1 stop13h 42m
United Airlines
Sat 21/315:00
YUL
-
LHR
1 stop11h 20m
United Airlines
Deal found 23/2£386
Sun 31/519:50
LHR
-
YUL
1 stop30h 20m
TAP AIR PORTUGAL
Wed 10/622:45
YUL
-
LHR
1 stop11h 50m
TAP AIR PORTUGAL
Deal found 21/2£391
Thu 9/420:50
LHR
-
YUL
1 stop25h 30m
Multiple Airlines
Thu 16/423:45
YUL
-
LHR
1 stop15h 20m
Multiple Airlines
Deal found 23/2£393
Fri 12/613:45
LHR
-
YUL
1 stop12h 25m
TAP AIR PORTUGAL
Sun 14/622:45
YUL
-
LHR
1 stop19h 10m
TAP AIR PORTUGAL
Deal found 19/2£395

Find flight deals from Heathrow to Montreal

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Montreal (YMQ). 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 23 February 2026.

Round-trip from

£379

One-way from

£323

Popular in

December

Cheapest in

September

Average price

£485

Good round-trip deal

£473 or less

Good one-way deal

£455 or less
TAP AIR PORTUGAL
  • TAP AIR PORTUGAL
  • 11/6-14/6
  • 2 total stops
  • 30h 40m total
  • London to Montreal
Search Deals
Aer Lingus
  • Aer Lingus
  • 17/4
  • 2 total stops
  • 15h 30m total
  • London to Montreal
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£14 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£9 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals
Price to beat on a round-trip flight from London Heathrow to Montreal (YMQ).
Search Deals
Price to beat on a one-way flight from London Heathrow to Montreal (YMQ).
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Montreal 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 858,174 searches. Data last updated 23 February 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Montreal that are best for you.

Fly from

Heathrow

Fly to

Montreal

Route

Depart

Return

Price

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Sat 14/3

06:50-21:12

2 stops18h 22m

Montreal Pierre Elliott Trudeau Intl

Thu 19/3

08:20-06:40

2 stops18h 20m

£448

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Tue 26/5

20:05-15:00

1 stop23h 55m

Montreal Pierre Elliott Trudeau Intl

Thu 8/10

16:40-07:55

1 stop10h 15m

£466

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Thu 2/4

20:50-17:20

1 stop25h 30m

Montreal Pierre Elliott Trudeau Intl

Sun 12/4

23:45-09:10

1 stop28h 25m

£476

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Thu 25/6

09:30-15:15

1 stop10h 45m

Montreal Pierre Elliott Trudeau Intl

Sun 28/6

22:10-10:00

Nonstop6h 50m

£493

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Thu 21/5

09:30-15:14

1 stop10h 44m

Montreal Pierre Elliott Trudeau Intl

Fri 29/5

22:10-10:00

Nonstop6h 50m

£494

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Sun 24/5

17:40-20:15

Nonstop7h 35m

Montreal Pierre Elliott Trudeau Intl

Thu 8/10

22:10-10:00

Nonstop6h 50m

£494

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Tue 5/5

06:50-19:17

2 stops17h 27m

Montreal Pierre Elliott Trudeau Intl

Thu 25/6

06:00-21:35

1 stop10h 35m

£509

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Tue 7/7

06:15-15:05

1 stop13h 50m

Montreal Pierre Elliott Trudeau Intl

Tue 28/7

19:00-10:30

1 stop10h 30m

£516

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Tue 7/7

09:00-15:05

1 stop11h 05m

Montreal Pierre Elliott Trudeau Intl

Thu 23/7

17:00-10:30

1 stop12h 30m

£516

LondonMontreal

LHR - YUL

LHRYUL

London Heathrow

Tue 7/7

09:00-15:05

1 stop11h 05m

Montreal Pierre Elliott Trudeau Intl

Wed 29/7

21:00-13:45

1 stop11h 45m

£516

Flights are sorted by cheapest return flights first.

Deals found on 19/2

Showing 1-10 of 22 results
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Best time to book a flight from Heathrow to Montreal

Have a flexible travel schedule? Discover the best time to fly to Montreal from Heathrow with our price prediction graph.
Estimated return 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 London Heathrow Airport to Montreal

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

Use this chart to determine the optimal time to book a return flight from Heathrow to Montreal. Price data was last updated on 20 February 2026.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to Montreal, you should look to book at least 84 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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

Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Montreal (average of £332). Flying from London Heathrow Airport to Montreal in July is currently the most expensive (average of £403). 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 LHR to YMQ?

Find hourly flight availability from Heathrow to Montreal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 February 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Heathrow Airport to Montreal as you normally would.

Weekly flight availability from London Heathrow Airport to Montreal

Explore weekly flight availability from Heathrow to Montreal. 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 23 February 2026.

The most flights from LHR to YMQ are scheduled on a Friday (15 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (6 on average).

How much does it cost for a return flight from London Heathrow Airport to Montreal?

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

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

Lisbon (LIS) – chosen by Cheapflights users on 27% of one-stop itineraries from London Heathrow Airport to Montreal on Cheapflights.

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

Average return fare for one-stop flights from London Heathrow Airport to Montreal, chosen by Cheapflights users in the past 12 months, with the same stopover each way.

Toronto (YYZ) is the most affordable one-stop option, with an average return flight price of £387.

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

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

Flights via Toronto (YYZ) have the shortest average one-way travel time for one-stop routes: 10h 50m.

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

Average stopover duration for one-stop one-way flights from London Heathrow Airport to Montreal, 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 stopover time of 1h 31m.

How often are flights from London to Montreal delayed?

About 9% of weekly flights between London and Montreal have experienced delays in the past year, with the average delay time being 154 minutes.

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

Tuesday 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 London to Montreal flights?

Over the past year, Air Canada have had the lowest number of delays on this route, with just 6% of flights being delayed.

Reviews of airlines servicing Montreal

Get insights into the airlines that provide service to Montreal. 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 Montreal. Reviews last updated 23 February 2026.
See what other customers who have flown with United Airlines, American Airlines, andAir Canada from London Heathrow Airport to Montreal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,342 reviews
Check prices

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,342 reviews
United Airlines
7.4
Good
9,342 reviews
Check prices

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
American Airlines
7.2
Good
11,341 reviews
United Airlines
7.4
Good
9,342 reviews
Check prices

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Air Canada
7.1
Good
10,739 reviews
United Airlines
7.4
Good
9,342 reviews
Check prices

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Lufthansa
6.8
Okay
7,803 reviews
United Airlines
7.4
Good
9,342 reviews
Check prices

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
British Airways
6.7
Okay
7,759 reviews
United Airlines
7.4
Good
9,342 reviews
Check prices

Food

6.6

Entertainment

7.1

Boarding

7.7

Overall

7.4

Comfort

7.3

Crew

8.1

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

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

    For as low as £475, United Airlines can have you in Montreal from London Heathrow Airport in 13h. The distance between London Heathrow Airport and Montreal is about 3239 mi. Both multi-stop and direct flights can be found to your destination and back.

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

    According to our current data, Air Transat (£319), United Airlines (£325), and Air Canada (£367) offers the cheapest pricing from London Heathrow Airport to Montreal. Air Transat is 33% cheaper than the average price of flights available within the next 90 days to this destination.

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

    For one-way options, check prices for Virgin Atlantic. According to our data, you can fly for as low as £276. Users have also found prices from £289 and £325 on British Airways and TAP AIR PORTUGAL, respectively.

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

    No one likes to see their flight delayed. When booking a flight from London Heathrow Airport to Montreal consider choosing Aegean Airlines (96%), Air Canada (92%) or Thai Airways (92%) as they are the most reliable in getting you off to your destination on time.

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

    While on average a flight from London Heathrow Airport to Montreal is generally £1,075, our data shows the cheapest flight currently is £355. When looking at the most popular route, (London Heathrow - Montreal Pierre Elliott Trudeau Intl), you can expect to pay £383 for that flight.

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

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

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

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

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

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

    Currently, May is the cheapest month in which you can book a flight from London Heathrow Airport to Montreal (average of £332). Flying from London Heathrow Airport to Montreal in July is currently the most expensive (average of £403). 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

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 7 airlines flying from Heathrow to Montreal

Discover the top 7 airlines that operate flights from Heathrow to Montreal. 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 858,174 searches. Data last updated 23 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Air TransatCheapest£319Average£490FlexibilityNo cancel feeOn-time50%
Search Air Transat flights
United AirlinesCheapest£325Average£491FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Air CanadaCheapest£367Average£500FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
British AirwaysCheapest£375Average£521FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£385Average£505FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights
FinnairCheapest£387Average£787FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£423Average£719FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Montreal?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Heathrow to Montreal. 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 Heathrow to Montreal?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Heathrow to Montreal for you. Better yet — we are completely free to use.

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

Yes! Cheapflights helps users easily find flights from Heathrow to Montreal with no change fees.

Can Cheapflights notify me if prices for flights from Heathrow to Montreal become cheaper?

Yes! Start tracking prices for Heathrow to Montreal flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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