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.

£584 Cheap Flights from Great Falls to London in 2026/27

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.

06:30 - 08:25GTF Great Falls-LHR London Heathrow

18h 55m2 stops Denver Intl Newark

07:30 - 21:54LHR London Heathrow-GTF Great Falls

21h 24m2 stops Frankfurt am Main Denver Intl

£584United Airlines

Mon, 1 Mar - Wed, 3 Mar

14:42 - 09:40GTF Great Falls-LHR London Heathrow

11h 58m1 stop Denver Intl

07:30 - 21:54LHR London Heathrow-GTF Great Falls

21h 24m2 stops Frankfurt am Main Denver Intl

£630United Airlines

Mon, 1 Mar - Wed, 3 Mar

14:25 - 10:00GTF Great Falls-LHR London Heathrow

36h 35m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

06:55 - 13:29LHR London Heathrow-GTF Great Falls

37h 34m2 stops Munich Franz Josef Strauss Denver Intl

£677United Airlines

Sat, 24 Apr - Wed, 28 Apr

14:25 - 10:00GTF Great Falls-LHR London Heathrow

36h 35m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

06:55 - 13:29LHR London Heathrow-GTF Great Falls

37h 34m2 stops Munich Franz Josef Strauss Denver Intl

£678United Airlines

Sat, 24 Apr - Wed, 28 Apr

14:42 - 09:40GTF Great Falls-LHR London Heathrow

11h 58m1 stop Denver Intl

11:35 - 21:54LHR London Heathrow-GTF Great Falls

17h 19m1 stop Denver Intl

£693United Airlines

Mon, 1 Mar - Wed, 3 Mar

16:55 - 15:05GTF Great Falls-LHR London Heathrow

15h 10m1 stop Seattle/Tacoma Intl

17:00 - 16:13LHR London Heathrow-GTF Great Falls

30h 13m1 stop Seattle/Tacoma Intl

£708Alaska Airlines

Sat, 24 Apr - Wed, 28 Apr

16:55 - 15:05GTF Great Falls-LHR London Heathrow

15h 10m1 stop Seattle/Tacoma Intl

17:00 - 16:13LHR London Heathrow-GTF Great Falls

30h 13m1 stop Seattle/Tacoma Intl

£709Alaska Airlines

Sat, 24 Apr - Wed, 28 Apr

06:15 - 09:40GTF Great Falls-LHR London Heathrow

20h 25m1 stop Denver Intl

07:25 - 22:30LHR London Heathrow-GTF Great Falls

22h 05m2 stops Munich Franz Josef Strauss Denver Intl

£712United Airlines

Wed, 7 Apr - Sat, 17 Apr

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

17h 30m2 stops Denver Intl Chicago O'Hare Intl

09:00 - 22:30LHR London Heathrow-GTF Great Falls

20h 30m2 stops Munich Franz Josef Strauss Denver Intl

£715United Airlines

Wed, 7 Apr - Sat, 17 Apr

06:15 - 06:30GTF Great Falls-LHR London Heathrow

17h 15m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

14:50 - 22:30LHR London Heathrow-GTF Great Falls

14h 40m1 stop Denver Intl

£739United Airlines

Sat, 24 Apr - Wed, 28 Apr

Cheap last-minute flights

Enter your travel dates to find the best prices.

14:45 - 09:40GTF Great Falls-LHR London Heathrow

11h 55m1 stop Denver Intl

11:35 - 21:38LHR London Heathrow-GTF Great Falls

17h 03m1 stop Denver Intl

£766United Airlines

Wed, 4 Nov - Wed, 18 Nov

14:45 - 09:40GTF Great Falls-LHR London Heathrow

11h 55m1 stop Denver Intl

11:35 - 21:38LHR London Heathrow-GTF Great Falls

17h 03m1 stop Denver Intl

£803United Airlines

Fri, 6 Nov - Tue, 17 Nov

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

13h 42m1 stop Salt Lake City

10:45 - 17:39LHR London Heathrow-GTF Great Falls

13h 54m1 stop Salt Lake City

£825Delta

Wed, 4 Nov - Sun, 15 Nov

14:45 - 09:40GTF Great Falls-LHR London Heathrow

11h 55m1 stop Denver Intl

11:35 - 21:38LHR London Heathrow-GTF Great Falls

17h 03m1 stop Denver Intl

£840United Airlines

Thu, 5 Nov - Mon, 16 Nov

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

13h 42m1 stop Salt Lake City

10:45 - 17:39LHR London Heathrow-GTF Great Falls

13h 54m1 stop Salt Lake City

£862Delta

Fri, 6 Nov - Sun, 15 Nov

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

13h 42m1 stop Salt Lake City

10:45 - 17:39LHR London Heathrow-GTF Great Falls

13h 54m1 stop Salt Lake City

£906Delta

Sat, 7 Nov - Sat, 14 Nov

14:45 - 09:40GTF Great Falls-LHR London Heathrow

11h 55m1 stop Denver Intl

11:35 - 21:38LHR London Heathrow-GTF Great Falls

17h 03m1 stop Denver Intl

£977United Airlines

Sun, 8 Nov - Sat, 14 Nov

14:45 - 09:40GTF Great Falls-LHR London Heathrow

11h 55m1 stop Denver Intl

11:35 - 21:38LHR London Heathrow-GTF Great Falls

17h 03m1 stop Denver Intl

£1,221United Airlines

Sun, 8 Nov - Sun, 15 Nov

14:45 - 09:40GTF Great Falls-LHR London Heathrow

11h 55m1 stop Denver Intl

11:35 - 21:38LHR London Heathrow-GTF Great Falls

17h 03m1 stop Denver Intl

£1,258United Airlines

Thu, 5 Nov - Sun, 15 Nov

14:45 - 09:40GTF Great Falls-LHR London Heathrow

11h 55m1 stop Denver Intl

11:35 - 21:38LHR London Heathrow-GTF Great Falls

17h 03m1 stop Denver Intl

£1,630United Airlines

Wed, 4 Nov - Fri, 20 Nov

Save money when you book flights with momondo

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Delta flights from Great Falls to London

Our best Delta deals on Great Falls to London flight tickets

Delta

7 Apr

GTF05:30Great Falls

21h 30m

1 stop

LHR10:00London Heathrow

17 Apr

LHR10:55London Heathrow

18h 58m

1 stop

GTF22:53Great Falls

£749

Delta

4 Nov

GTF13:18Great Falls

13h 42m

1 stop

LHR10:00London Heathrow

15 Nov

LHR10:45London Heathrow

13h 54m

1 stop

GTF17:39Great Falls

£825

Delta

6 Nov

GTF13:18Great Falls

13h 42m

1 stop

LHR10:00London Heathrow

15 Nov

LHR10:45London Heathrow

13h 54m

1 stop

GTF17:39Great Falls

£862

United Airlines flights from Great Falls to London

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

United Airlines

1 Mar

GTF06:30Great Falls

18h 55m

2 stops

LHR08:25London Heathrow

3 Mar

LHR07:30London Heathrow

21h 24m

2 stops

GTF21:54Great Falls

£584

United Airlines

1 Mar

GTF14:42Great Falls

11h 58m

1 stop

LHR09:40London Heathrow

3 Mar

LHR07:30London Heathrow

21h 24m

2 stops

GTF21:54Great Falls

£630

United Airlines

24 Apr

GTF14:25Great Falls

36h 35m

2 stops

LHR10:00London Heathrow

28 Apr

LHR06:55London Heathrow

37h 34m

2 stops

GTF13:29Great Falls

£677

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Mon 1/3

06:30-08:25

2 stops18h 55m

London Heathrow

Wed 3/3

07:30-21:54

2 stops21h 24m

£584

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Mon 1/3

14:42-09:40

1 stop11h 58m

London Heathrow

Wed 3/3

07:30-21:54

2 stops21h 24m

£630

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Sat 24/4

14:25-10:00

2 stops36h 35m

London Heathrow

Wed 28/4

06:55-13:29

2 stops37h 34m

£677

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Sat 24/4

14:25-10:00

2 stops36h 35m

London Heathrow

Wed 28/4

06:55-13:29

2 stops37h 34m

£678

Fastest return journey

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Mon 1/3

14:42-09:40

1 stop11h 58m

London Heathrow

Wed 3/3

11:35-21:54

1 stop17h 19m

£693

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Sat 24/4

16:55-15:05

1 stop15h 10m

London Heathrow

Wed 28/4

17:00-16:13

1 stop30h 13m

£708

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Sat 24/4

16:55-15:05

1 stop15h 10m

London Heathrow

Wed 28/4

17:00-16:13

1 stop30h 13m

£709

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Wed 7/4

06:15-09:40

1 stop20h 25m

London Heathrow

Sat 17/4

07:25-22:30

2 stops22h 05m

£712

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Wed 7/4

06:15-06:45

2 stops17h 30m

London Heathrow

Sat 17/4

09:00-22:30

2 stops20h 30m

£715

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Sat 24/4

06:15-06:30

2 stops17h 15m

London Heathrow

Wed 28/4

14:50-22:30

1 stop14h 40m

£739

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	£584
Fastest flight time	11h 55m
Direct flights	None

The best flight deal from Great Falls to London found on momondo in the last 72 hours is £584

The fastest flight from Great Falls to London takes 11h 55m

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 11h 55m, 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

Ipswich

Slough

Maidstone

Folkestone

Hastings

Ilford

Canterbury

Colchester

Chichester

Hayes

Bedford

Guildford

Winchester

Worthing

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

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Fly into one of these airports located in London

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London Gatwick Airport

London Heathrow Airport

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London Stansted Airport

Cheap flights from Great Falls to London from £584

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 1/3. 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

Delta flights from Great Falls to London

Our best Delta deals on Great Falls to London flight tickets

United Airlines flights from Great Falls to London

Our best United 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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