How long is the flight from Great Falls to London Heathrow Airport?

Airlines like Alaska Airlines, KLM, and Delta fly from Great Falls to London Heathrow Airport in about 12h 21m. The time it takes to get you to your destination can typically vary by up to 6h 56m. The distance between Great Falls and London Heathrow Airport is about 4472 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What is the cheapest time of day to fly from GTF to LHR?

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

What airport do you fly from for flights from Great Falls to London Heathrow?

Great Falls (GTF), located 3.5 mi from the city center, is the airport you fly out of when you book flights from Great Falls to London Heathrow. 0 airlines have flights from Great Falls to London Heathrow on a regular basis. Booking flights from Great Falls to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

Can I find deals for flights from Great Falls to Heathrow that include hotel bookings?

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

How can I find direct flights from Great Falls to Heathrow?

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

Can I find deals for business class flights from Great Falls to Heathrow?

Yes. Cheapflights offers flight deals from Great Falls 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.

£560+ Cheap Flights from Great Falls to London Heathrow Airport

Cheap flight deals from Great Falls to Heathrow

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Cheapest flights from Great Falls to Heathrow
Explore the most affordable flight options available from Great Falls to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Tue 10/1116:59 -

1 stop12h 21m

Fri 13/1114:45 -

1 stop32h 34m

Deal found 10/9£560

Fri 23/1013:18 -

1 stop13h 42m

Fri 30/1020:10 -

2 stops22h 28m

Deal found 9/9£628

Fri 23/1017:15 -

1 stop14h 50m

Fri 30/1014:45 -

1 stop31h 50m

Deal found 9/9£719

Sat 12/905:40 -

1 stop21h 20m

Sat 19/906:15 -

2 stops18h 26m

Deal found 8/9£839

Sat 12/906:15 -

2 stops17h 40m

Sat 19/909:30 -

2 stops34h 59m

Deal found 8/9£876

Fri 23/1006:15 -

2 stops17h 15m

Fri 30/1013:00 -

3 stops30h 49m

Deal found 9/9£995

Tue 10/1114:45 -

1 stop11h 55m

Fri 13/1111:35 -

1 stop17h 03m

Deal found 12/9£1,013

Find flight deals from Great Falls to Heathrow

Round-trip from	£560

Alaska Airlines
10/11-13/11
2 total stops
44h 55m total
Great Falls to London

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Use the filters below to find and compare flights from Great Falls to London Heathrow Airport that are best for you.

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Return

Price

Cheapest return flight

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Tue 10/11

16:59-12:20

1 stop12h 21m

London Heathrow

Fri 13/11

14:45-16:19

1 stop32h 34m

£560

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Fri 23/10

13:18-15:35

2 stops19h 17m

London Heathrow

Fri 30/10

20:10-22:40

2 stops32h 30m

£628

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Fri 23/10

13:18-10:00

1 stop13h 42m

London Heathrow

Fri 30/10

20:10-12:38

2 stops22h 28m

£628

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Fri 23/10

06:15-06:30

2 stops17h 15m

London Heathrow

Fri 30/10

13:00-13:49

3 stops30h 49m

£995

Fastest return journey

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Tue 10/11

14:45-09:40

1 stop11h 55m

London Heathrow

Fri 13/11

11:35-21:38

1 stop17h 03m

£1,013

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Sorted by cheapest first

Best time to book a flight from Great Falls to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Great Falls with our price prediction graph.

GTF-LHR

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.

Related info for your journey

What airport do you fly from for flights from Great Falls to London Heathrow?
Great Falls (GTF), located 3.5 mi from the city center, is the airport you fly out of when you book flights from Great Falls to London Heathrow. 0 airlines have flights from Great Falls to London Heathrow on a regular basis. Booking flights from Great Falls to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.
How long is the flight from Great Falls to London Heathrow Airport?
Airlines like Alaska Airlines, KLM, and Delta fly from Great Falls to London Heathrow Airport in about 12h 21m. The time it takes to get you to your destination can typically vary by up to 6h 56m. The distance between Great Falls and London Heathrow Airport is about 4472 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.
Can I find deals for flights from Great Falls to Heathrow that include hotel bookings?
Yes. In addition to deals on Great Falls to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Great Falls to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Great Falls to Heathrow.
Can I find deals for business class flights from Great Falls to Heathrow?
Yes. Cheapflights offers flight deals from Great Falls 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.

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Cheap flights from Great Falls to London Heathrow Airport from £560

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/11. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Great Falls to Heathrow

Cheapest flights from Great Falls to HeathrowExplore the most affordable flight options available from Great Falls to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Explore the most affordable flight options available from Great Falls to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Best flights from Great Falls to HeathrowDiscover carefully curated flight deals from Great Falls to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Discover carefully curated flight deals from Great Falls to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Last-minute flights from Great Falls to HeathrowDiscover last-minute flight deals from Great Falls to Heathrow. Data last updated 13 September 2026 and is based on user searches.

Discover last-minute flight deals from Great Falls to Heathrow. Data last updated 13 September 2026 and is based on user searches.

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Use the filters below to find and compare flights from Great Falls to London Heathrow Airport that are best for you.

Best time to book a flight from Great Falls to Heathrow

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Related info for your journey

What airport do you fly from for flights from Great Falls to London Heathrow?

How long is the flight from Great Falls to London Heathrow Airport?

Can I find deals for flights from Great Falls to Heathrow that include hotel bookings?

How can I find direct flights from Great Falls to Heathrow?

Can I find deals for business class flights from Great Falls to Heathrow?

Travelling to a place near London Heathrow Airport?

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.

Alternative routes for Great Falls to Heathrow

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Complete your trip

Complete your trip to Heathrow by adding a car hire and/or hotel booking to your travel itinerary.

Direct flights to England

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Search flights from Great Falls to Heathrow by cabin class

Find flights from Great Falls to Heathrow, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Other flights to Heathrow

Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 13 September 2026.

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How does Cheapflights help users find flights from Great Falls to Heathrow?

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

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

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Cheapest flights from Great Falls to Heathrow
Explore the most affordable flight options available from Great Falls to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 September 2026.

Best flights from Great Falls to Heathrow
Discover carefully curated flight deals from Great Falls to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 September 2026.

Last-minute flights from Great Falls to Heathrow
Discover last-minute flight deals from Great Falls to Heathrow. Data last updated 13 September 2026 and is based on user searches.