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.

£582 Cheap Flights from Great Falls to London in 2026/27

Find the cheapest flights from Great Falls to London

Return

One-way

Cheap return flights

Enter your travel dates to find the best prices.

06:30 - 10:50GTF Great Falls-LHR London Heathrow

21h 20m2 stops Denver Intl Washington, D.C. Dulles Intl

07:30 - 13:29LHR London Heathrow-GTF Great Falls

36h 59m2 stops Frankfurt am Main Denver Intl

£582United Airlines

Mon, 1 Mar - Wed, 3 Mar

14:25 - 09:40GTF Great Falls-LHR London Heathrow

12h 15m1 stop Denver Intl

07:30 - 21:50LHR London Heathrow-GTF Great Falls

21h 20m2 stops Frankfurt am Main Denver Intl

£629United Airlines

Mon, 1 Mar - Wed, 3 Mar

14:25 - 06:30GTF Great Falls-LHR London Heathrow

57h 05m2 stops Denver Intl Toronto Pearson Intl

07:30 - 13:29LHR London Heathrow-GTF Great Falls

36h 59m2 stops Frankfurt am Main Denver Intl

£677United Airlines

Fri, 5 Mar - Tue, 9 Mar

14:25 - 06:30GTF Great Falls-LHR London Heathrow

57h 05m2 stops Denver Intl Toronto Pearson Intl

11:35 - 13:29LHR London Heathrow-GTF Great Falls

32h 54m1 stop Denver Intl

£693United Airlines

Fri, 5 Mar - Tue, 9 Mar

14:25 - 09:40GTF Great Falls-LHR London Heathrow

12h 15m1 stop Denver Intl

11:35 - 21:50LHR London Heathrow-GTF Great Falls

17h 15m1 stop Denver Intl

£695United Airlines

Mon, 1 Mar - Wed, 3 Mar

06:15 - 08:30GTF Great Falls-LHR London Heathrow

43h 15m3 stops Denver Intl Chicago O'Hare Intl Toronto Pearson Intl

07:30 - 21:34LHR London Heathrow-GTF Great Falls

21h 04m2 stops Frankfurt am Main Denver Intl

£714United Airlines

Fri, 5 Mar - Tue, 9 Mar

14:25 - 09:40GTF Great Falls-LHR London Heathrow

12h 15m1 stop Denver Intl

11:35 - 21:34LHR London Heathrow-GTF Great Falls

16h 59m1 stop Denver Intl

£725United Airlines

Fri, 5 Mar - Tue, 9 Mar

14:47 - 09:40GTF Great Falls-LHR London Heathrow

11h 53m1 stop Denver Intl

06:35 - 21:13LHR London Heathrow-GTF Great Falls

21h 38m2 stops Munich Franz Josef Strauss Denver Intl

£737United Airlines

Thu, 3 Dec - Thu, 10 Dec

14:47 - 07:10GTF Great Falls-LHR London Heathrow

33h 23m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl

06:35 - 21:13LHR London Heathrow-GTF Great Falls

21h 38m2 stops Munich Franz Josef Strauss Denver Intl

£740United Airlines

Thu, 3 Dec - Thu, 10 Dec

16:51 - 12:20GTF Great Falls-LHR London Heathrow

12h 29m1 stop Seattle/Tacoma Intl

14:45 - 16:11LHR London Heathrow-GTF Great Falls

32h 26m1 stop Seattle/Tacoma Intl

£759Alaska Airlines

Thu, 3 Dec - Thu, 10 Dec

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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

1 Mar

GTF06:30Great Falls

21h 20m

2 stops

LHR10:50London Heathrow

3 Mar

LHR07:30London Heathrow

36h 59m

2 stops

GTF13:29Great Falls

£582

United Airlines

1 Mar

GTF14:25Great Falls

12h 15m

1 stop

LHR09:40London Heathrow

3 Mar

LHR07:30London Heathrow

21h 20m

2 stops

GTF21:50Great Falls

£629

United Airlines

5 Mar

GTF14:25Great Falls

57h 05m

2 stops

LHR06:30London Heathrow

9 Mar

LHR07:30London Heathrow

36h 59m

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

06:30-10:50

2 stops21h 20m

London Heathrow

Wed 3/3

07:30-13:29

2 stops36h 59m

£582

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Mon 1/3

14:25-09:40

1 stop12h 15m

London Heathrow

Wed 3/3

07:30-21:50

2 stops21h 20m

£629

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Fri 5/3

14:25-06:30

2 stops57h 05m

London Heathrow

Tue 9/3

07:30-13:29

2 stops36h 59m

£677

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Fri 5/3

14:25-06:30

2 stops57h 05m

London Heathrow

Tue 9/3

11:35-13:29

1 stop32h 54m

£693

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Mon 1/3

14:25-09:40

1 stop12h 15m

London Heathrow

Wed 3/3

11:35-21:50

1 stop17h 15m

£695

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Fri 5/3

06:15-08:30

3 stops43h 15m

London Heathrow

Tue 9/3

07:30-21:34

2 stops21h 04m

£714

Fastest return journey

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Fri 5/3

14:25-09:40

1 stop12h 15m

London Heathrow

Tue 9/3

11:35-21:34

1 stop16h 59m

£725

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Thu 3/12

14:47-09:40

1 stop11h 53m

London Heathrow

Thu 10/12

06:35-21:13

2 stops21h 38m

£737

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Thu 3/12

14:47-07:10

2 stops33h 23m

London Heathrow

Thu 10/12

06:35-21:13

2 stops21h 38m

£740

Great FallsLondon

GTF Great Falls - LHR London Heathrow

GTFLHR

Great Falls

Thu 3/12

16:51-12:20

1 stop12h 29m

London Heathrow

Thu 10/12

14:45-16:11

1 stop32h 26m

£759

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	£582
Fastest flight time	11h 53m
Direct flights	None

The best flight deal from Great Falls to London found on momondo in the last 72 hours is £582

The fastest flight from Great Falls to London takes 11h 53m

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 53m, 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

Chichester

Colchester

Guildford

Hayes

Bedford

Worthing

Winchester

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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Cheap flights from Great Falls to London from £582

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

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

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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