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.

£452 Cheap Flights from Great Falls to London in 2025/26

1 adult

0 bags

Voted winner of Europe's Best Travel App 2023

Save money when you book flights with momondo

Big names, great deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customise your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

06:15 - 09:40GTF-LHR

21h 25m1 stop

16:40 - 21:19LHR-GTF

58h 39m2 stops

£481United Airlines

Find Deal

Wed, 18 Mar - Mon, 23 Mar

14:30 - 16:50GTF-LHR

20h 20m2 stops

16:40 - 21:19LHR-GTF

58h 39m2 stops

£496United Airlines

Find Deal

Wed, 18 Mar - Mon, 23 Mar

13:10 - 10:30GTF-LHR

15h 20m2 stops

10:55 - 17:39LHR-GTF

13h 44m1 stop

£548KLM

Find Deal

Thu, 26 Mar - Sun, 5 Apr

06:15 - 15:50GTF-LHR

27h 35m2 stops

15:50 - 21:17LHR-GTF

36h 27m2 stops

£566United Airlines

Find Deal

Thu, 26 Mar - Sun, 5 Apr

16:00 - 15:10GTF-LHR

17h 10m2 stops

16:25 - 15:20LHR-GTF

29h 55m2 stops

£612Multiple Airlines

Find Deal

Thu, 26 Mar - Sun, 5 Apr

16:00 - 12:20GTF-LHR

14h 20m1 stop

14:55 - 15:20LHR-GTF

30h 25m1 stop

£616Multiple Airlines

Find Deal

Wed, 18 Mar - Mon, 23 Mar

16:00 - 07:10GTF-LHR

33h 10m1 stop

16:30 - 15:20LHR-GTF

29h 50m1 stop

£625Multiple Airlines

Find Deal

Thu, 26 Mar - Sun, 5 Apr

06:15 - 10:15GTF-LHR

22h 00m2 stops

08:00 - 21:17LHR-GTF

20h 17m3 stops

£2,339United Airlines

Find Deal

Thu, 26 Mar - Sun, 5 Apr

United Airlines flights from Great Falls to London

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

United Airlines

18 Mar

GTF06:15Great Falls

21h 25m

1 stop

LHR09:40London Heathrow

23 Mar

LHR16:40London Heathrow

58h 39m

2 stops

GTF21:19Great Falls

£481

Find similar

United Airlines

18 Mar

GTF14:30Great Falls

20h 20m

2 stops

LHR16:50London Heathrow

23 Mar

LHR16:40London Heathrow

58h 39m

2 stops

GTF21:19Great Falls

£496

Find similar

United Airlines

26 Mar

GTF06:15Great Falls

27h 35m

2 stops

LHR15:50London Heathrow

5 Apr

LHR15:50London Heathrow

36h 27m

2 stops

GTF21:17Great Falls

£566

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 18/3

06:15-09:40

1 stop21h 25m

London Heathrow

Mon 23/3

16:40-21:19

2 stops58h 39m

£481

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 18/3

14:30-16:50

2 stops20h 20m

London Heathrow

Mon 23/3

16:40-21:19

2 stops58h 39m

£496

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 26/3

13:10-10:30

2 stops15h 20m

London Heathrow

Sun 5/4

10:55-17:39

1 stop13h 44m

£548

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 26/3

06:15-15:50

2 stops27h 35m

London Heathrow

Sun 5/4

15:50-21:17

2 stops36h 27m

£566

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 26/3

16:00-15:10

2 stops17h 10m

London Heathrow

Sun 5/4

16:25-15:20

2 stops29h 55m

£612

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 18/3

16:00-12:20

1 stop14h 20m

London Heathrow

Mon 23/3

14:55-15:20

1 stop30h 25m

£616

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 26/3

16:00-07:10

1 stop33h 10m

London Heathrow

Sun 5/4

16:30-15:20

1 stop29h 50m

£625

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 26/3

06:15-10:15

2 stops22h 00m

London Heathrow

Sun 5/4

08:00-21:17

3 stops20h 17m

£2,339

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 13/1

13:15-10:00

1 stop13h 45m

£283

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 13/1

17:59-12:50

3 stops59h 51m

£304

Flights are sorted by cheapest return flights first.

Sorted 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 05m
Direct flights	None

The fastest flight from Great Falls to London takes 12h 05m

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 14h 20m, 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.

Eastbourne

Milton Keynes

Luton

Gatwick

Maidstone

Slough

Canterbury

Southend-on-Sea

Ipswich

Ilford

Guildford

Hayes

Dover

Chelmsford

Colchester

Worthing

Bedford

Ramsgate

Hounslow

Stansted

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.