What is the cheapest airline that flies from Great Falls to London?

United Airlines and KLM are the most popular carriers operating from Great Falls to London

When did momondo last update prices for flights from Great Falls Airport to London?

Prices for flights from Great Falls Airport to London are refreshed on a daily basis.

How old do you have to be to fly from Great Falls Airport to London?

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Great Falls Airport to London.

What documentation or ID do you need to fly to London?

The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

£291 Cheap Flights from Great Falls to London in 2026

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Find the cheapest flights from Great Falls to London

Round-trip

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

06:25 - 09:40

GTF

LHR

20h 15m

1 stop

06:35 - 21:11

LHR

GTF

20h 36m

2 stops

£464United Airlines

Sat, 28 Feb - Wed, 11 Mar

18:20 - 10:00

GTF

LHR

32h 40m

1 stop

11:45 - 17:42

LHR

GTF

35h 57m

2 stops

£464Delta

Sun, 1 Mar - Wed, 11 Mar

18:20 - 10:00

GTF

LHR

32h 40m

1 stop

06:20 - 22:30

LHR

GTF

22h 10m

2 stops

£468Delta

Sun, 1 Mar - Tue, 10 Mar

14:25 - 22:55

GTF

LHR

25h 30m

2 stops

06:35 - 21:11

LHR

GTF

20h 36m

2 stops

£470United Airlines

Mon, 2 Mar - Thu, 12 Mar

05:20 - 09:00

GTF

LHR

20h 40m

3 stops

06:20 - 17:42

LHR

GTF

17h 22m

2 stops

£472Delta

Tue, 3 Mar - Fri, 13 Mar

13:15 - 13:50

GTF

LHR

17h 35m

2 stops

11:45 - 17:42

LHR

GTF

35h 57m

2 stops

£472Delta

Mon, 2 Mar - Mon, 16 Mar

14:30 - 09:40

GTF

LHR

12h 10m

1 stop

13:00 - 21:11

LHR

GTF

38h 11m

2 stops

£474United Airlines

Thu, 5 Mar - Mon, 16 Mar

18:20 - 06:50

GTF

LHR

29h 30m

2 stops

06:20 - 17:42

LHR

GTF

17h 22m

2 stops

£475Delta

Sun, 1 Mar - Fri, 13 Mar

06:15 - 10:00

GTF

LHR

20h 45m

2 stops

07:25 - 13:34

LHR

GTF

37h 09m

2 stops

£478United Airlines

Wed, 15 Apr - Wed, 29 Apr

13:09 - 15:35

GTF

LHR

19h 26m

2 stops

09:55 - 22:44

LHR

GTF

19h 49m

2 stops

£479Multiple Airlines

Tue, 28 Apr - Wed, 13 May

United Airlines flights from Great Falls to London

Our best United Airlines deals on Great Falls to London flight tickets

United Airlines

28 Feb

GTF06:25Great Falls

20h 15m

1 stop

LHR09:40London Heathrow

11 Mar

LHR06:35London Heathrow

20h 36m

2 stops

GTF21:11Great Falls

£464

United Airlines

2 Mar

GTF14:25Great Falls

25h 30m

2 stops

LHR22:55London Heathrow

12 Mar

LHR06:35London Heathrow

20h 36m

2 stops

GTF21:11Great Falls

£470

United Airlines

5 Mar

GTF14:30Great Falls

12h 10m

1 stop

LHR09:40London Heathrow

16 Mar

LHR13:00London Heathrow

38h 11m

2 stops

GTF21:11Great Falls

£474

Delta flights from Great Falls to London

Our best Delta deals on Great Falls to London flight tickets

Delta

1 Mar

GTF18:20Great Falls

32h 40m

1 stop

LHR10:00London Heathrow

11 Mar

LHR11:45London Heathrow

35h 57m

2 stops

GTF17:42Great Falls

£464

Delta

1 Mar

GTF18:20Great Falls

32h 40m

1 stop

LHR10:00London Heathrow

10 Mar

LHR06:20London Heathrow

22h 10m

2 stops

GTF22:30Great Falls

£468

Delta

3 Mar

GTF05:20Great Falls

20h 40m

3 stops

LHR09:00London Heathrow

13 Mar

LHR06:20London Heathrow

17h 22m

2 stops

GTF17:42Great Falls

£472

Fly from

Fly to

Route

Depart

Return

Price

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 28/2

06:25-09:40

1 stop20h 15m

London Heathrow

Wed 11/3

06:35-21:11

2 stops20h 36m

£464

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 1/3

18:20-10:00

1 stop32h 40m

London Heathrow

Wed 11/3

11:45-17:42

2 stops35h 57m

£464

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 1/3

18:20-10:00

1 stop32h 40m

London Heathrow

Tue 10/3

06:20-22:30

2 stops22h 10m

£468

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 2/3

14:25-22:55

2 stops25h 30m

London Heathrow

Thu 12/3

06:35-21:11

2 stops20h 36m

£470

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 3/3

05:20-09:00

3 stops20h 40m

London Heathrow

Fri 13/3

06:20-17:42

2 stops17h 22m

£472

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 2/3

13:15-13:50

2 stops17h 35m

London Heathrow

Mon 16/3

11:45-17:42

2 stops35h 57m

£472

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 5/3

14:30-09:40

1 stop12h 10m

London Heathrow

Mon 16/3

13:00-21:11

2 stops38h 11m

£474

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 1/3

18:20-06:50

2 stops29h 30m

London Heathrow

Fri 13/3

06:20-17:42

2 stops17h 22m

£475

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 15/4

06:15-10:00

2 stops20h 45m

London Heathrow

Wed 29/4

07:25-13:34

2 stops37h 09m

£478

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 28/4

13:09-15:35

2 stops19h 26m

London Heathrow

Wed 13/5

09:55-22:44

2 stops19h 49m

£479

Flights are sorted by cheapest return flights first.

Showing 1-10 of 18 resultsSorted by cheapest first

How to get the cheapest flight ticket from Great Falls to London

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Can stopping save me money on Great Falls to London flights?

You could potentially save up to 1% on your flight if you consider stops on a Great Falls to London flight.

When to book flights from Great Falls to London

Are you open to changing your travel dates? Check out the ideal times to fly from Great Falls to London according to our flight data. Find out which month and days have the cheapest flights.

Estimated return price

Cheap Great Falls to London (GTF to LON) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Great Falls to London

Fastest flight time	12h 11m
Direct flights	None

The fastest flight from Great Falls to London takes 12h 11m

There are no direct flights from Great Falls to London. There are no popular flight routes from Great Falls to London.

Search flight deals

How far is Great Falls to London by plane?
The straight-line distance from Great Falls to London is 4477.2 mi. Flights usually cover this in 12h 11m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Great Falls Airport to London?
Prices for flights from Great Falls Airport to London are refreshed on a daily basis.
How old do you have to be to fly from Great Falls Airport to London?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Great Falls Airport to London.
What documentation or ID do you need to fly to London?
The required travel and health documents for your London trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at London. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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Why use momondo?

Why should I use momondo to find a flight deal from Great Falls to London?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Great Falls to London. momondo saves you time and could save you money on your trip.

Can I find flights from Great Falls to London with flexible booking policies on momondo?

Yes. All flights to London from Great Falls on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Great Falls to London?

Once all potential Great Falls to London flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Great Falls to London right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Great Falls to London now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to London and let you know when they change.