How do I get Price Alerts for flights from Great Falls to London?

Search flight deals from Great Falls to London . While viewing offers you’ll have the option to create a Price Alert.

How can I save money on flights from Great Falls to London with momondo?

Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.

How does momondo find its flight prices?

We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

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.

£559 Cheap Flights from Great Falls to London in 2026

Find the cheapest flights from Great Falls to London

Return

One-way

Last minute

Cheap return flights

Enter your travel dates to find the best prices.

16:59 - 12:20GTF Great Falls-LHR London Heathrow

12h 21m1 stop Seattle/Tacoma Intl

14:45 - 16:19LHR London Heathrow-GTF Great Falls

32h 34m1 stop Seattle/Tacoma Intl

£559Alaska Airlines

Tue, 10 Nov - Fri, 13 Nov

13:18 - 10:00GTF Great Falls-LHR London Heathrow

13h 42m1 stop Salt Lake City

20:10 - 12:38LHR London Heathrow-GTF Great Falls

22h 28m2 stops New York John F Kennedy Intl Salt Lake City

£627Delta

Fri, 23 Oct - Fri, 30 Oct

16:59 - 12:20GTF Great Falls-LHR London Heathrow

12h 21m1 stop Seattle/Tacoma Intl

14:45 - 16:19LHR London Heathrow-GTF Great Falls

32h 34m1 stop Seattle/Tacoma Intl

£675Alaska Airlines

Tue, 10 Nov - Fri, 13 Nov

16:59 - 12:20GTF Great Falls-LHR London Heathrow

12h 21m1 stop Seattle/Tacoma Intl

14:45 - 16:19LHR London Heathrow-GTF Great Falls

32h 34m1 stop Seattle/Tacoma Intl

£691Alaska Airlines

Tue, 10 Nov - Fri, 13 Nov

14:37 - 09:40GTF Great Falls-LHR London Heathrow

12h 03m1 stop Denver Intl

06:35 - 21:38LHR London Heathrow-GTF Great Falls

45h 03m2 stops Munich Franz Josef Strauss Denver Intl

£706United Airlines

Fri, 23 Oct - Fri, 30 Oct

06:15 - 11:55GTF Great Falls-LHR London Heathrow

22h 40m2 stops Denver Intl Chicago O'Hare Intl

06:35 - 21:38LHR London Heathrow-GTF Great Falls

45h 03m2 stops Munich Franz Josef Strauss Denver Intl

£709United Airlines

Fri, 23 Oct - Fri, 30 Oct

14:37 - 07:45GTF Great Falls-LHR London Heathrow

34h 08m2 stops Denver Intl Houston George Bush Intcntl

16:40 - 21:22LHR London Heathrow-GTF Great Falls

35h 42m2 stops Washington, D.C. Dulles Intl Denver Intl

£711Lufthansa

Sat, 3 Oct - Sat, 17 Oct

17:15 - 15:05GTF Great Falls-LHR London Heathrow

14h 50m1 stop Seattle/Tacoma Intl

14:45 - 16:35LHR London Heathrow-GTF Great Falls

31h 50m1 stop Seattle/Tacoma Intl

£718Alaska Airlines

Fri, 23 Oct - Fri, 30 Oct

17:15 - 06:45GTF Great Falls-LHR London Heathrow

30h 30m1 stop Seattle/Tacoma Intl

09:50 - 16:35LHR London Heathrow-GTF Great Falls

13h 45m1 stop Seattle/Tacoma Intl

£818Multiple Airlines

Sat, 3 Oct - Sat, 17 Oct

17:15 - 06:50GTF Great Falls-LHR London Heathrow

30h 35m2 stops Seattle/Tacoma Intl Chicago O'Hare Intl

09:50 - 16:35LHR London Heathrow-GTF Great Falls

13h 45m1 stop Seattle/Tacoma Intl

£827Multiple Airlines

Sat, 3 Oct - Sat, 17 Oct

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United Airlines flights from Great Falls to London

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

United Airlines

23 Oct

GTF14:37Great Falls

12h 03m

1 stop

LHR09:40London Heathrow

30 Oct

LHR06:35London Heathrow

45h 03m

2 stops

GTF21:38Great Falls

£706

United Airlines

23 Oct

GTF06:15Great Falls

22h 40m

2 stops

LHR11:55London Heathrow

30 Oct

LHR06:35London Heathrow

45h 03m

2 stops

GTF21:38Great Falls

£709

United Airlines

22 Dec

GTF14:37Great Falls

56h 53m

2 stops

LHR06:30London Heathrow

29 Dec

LHR11:10London Heathrow

41h 31m

2 stops

GTF21:41Great Falls

£864

Alaska Airlines flights from Great Falls to London

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

Alaska Airlines

10 Nov

GTF16:59Great Falls

12h 21m

1 stop

LHR12:20London Heathrow

13 Nov

LHR14:45London Heathrow

32h 34m

1 stop

GTF16:19Great Falls

£559

Alaska Airlines

10 Nov

GTF16:59Great Falls

12h 21m

1 stop

LHR12:20London Heathrow

13 Nov

LHR14:45London Heathrow

32h 34m

1 stop

GTF16:19Great Falls

£675

Alaska Airlines

10 Nov

GTF16:59Great Falls

12h 21m

1 stop

LHR12:20London Heathrow

13 Nov

LHR14:45London Heathrow

32h 34m

1 stop

GTF16:19Great Falls

£691

Fly from

Fly to

Route

Depart

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

£559

Fastest return journey

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

£627

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

£675

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

£691

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Fri 23/10

14:37-09:40

1 stop12h 03m

London Heathrow

Fri 30/10

06:35-21:38

2 stops45h 03m

£706

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Fri 23/10

06:15-11:55

2 stops22h 40m

London Heathrow

Fri 30/10

06:35-21:38

2 stops45h 03m

£709

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Sat 3/10

14:37-07:45

2 stops34h 08m

London Heathrow

Sat 17/10

16:40-21:22

2 stops35h 42m

£711

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Fri 23/10

17:15-15:05

1 stop14h 50m

London Heathrow

Fri 30/10

14:45-16:35

1 stop31h 50m

£718

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Sat 3/10

17:15-06:45

1 stop30h 30m

London Heathrow

Sat 17/10

09:50-16:35

1 stop13h 45m

£818

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Sat 3/10

17:15-06:50

2 stops30h 35m

London Heathrow

Sat 17/10

09:50-16:35

1 stop13h 45m

£827

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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

Best price found	£559
Fastest flight time	13h 42m
Direct flights	None

The best flight deal from Great Falls to London found on momondo in the last 72 hours is £559

The fastest flight from Great Falls to London takes 13h 42m

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

Search flight deals

Frequently asked questions about flying from Great Falls to London

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 13h 42m, 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.

Frequently asked questions about flying from Great Falls to London

How do I get Price Alerts for flights from Great Falls to London?
Search flight deals from Great Falls to London. While viewing offers you’ll have the option to create a Price Alert.
How can I save money on flights from Great Falls to London with momondo?
Leverage our AI within our “Price Forecast” tool, which predicts if it’s better to book now or wait until prices decrease. You can strategically pick the best days to fly and save money on your trip by using our “Price Calendar” tool. “Explore” shows an overview of how much it costs to fly to anywhere from a selected city or airport. Our “Discover” content is a great option for travel inspiration and money-saving tips, while “Price Alerts” will update you when prices change, so you can book when fares are right.
How does momondo find its flight prices?
We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Eastbourne

Wembley

Gatwick

Milton Keynes

Southend-on-Sea

Luton

Slough

Ipswich

Maidstone

Folkestone

Hastings

Ilford

Canterbury

Chichester

Hayes

Bedford

Guildford

Colchester

Harlow

Chelmsford

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.

An easier way to manage your London trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

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Find better results for your trip to the United Kingdom

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Fly into one of these airports located in London

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London Gatwick Airport

London Heathrow Airport

London Luton Airport

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London Stansted Airport

Cheap flights from Great Falls to London from £559

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Great Falls to London departing on 10/11. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Find the cheapest flights from Great Falls to London

Cheap return flights

Cheap one-way flights

Cheap last-minute flights

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

United Airlines flights from Great Falls to London

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

Alaska Airlines flights from Great Falls to London

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

momondo Fare Finder

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

When to book flights from Great Falls to London

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

Best price found

Fastest flight time

Direct flights

Frequently asked questions about flying from Great Falls to London

Frequently asked questions about flying from Great Falls to London

Travelling to a place near London?

Why use momondo?

An easier way to manage your London trip

We make it super easy to schedule, organise and travel with friends or family. Trips is free – and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United Kingdom

Fly into one of these airports located in London

Airports listed have a maximum distance of 35.6 mi from London

Cabin classes currently available on flights to London

List of cabin classes available on flights landing in London. Availability may vary depending on flight origin and airline.

Popular Cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo

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