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

Brussels Airlines, SWISS, and Alaska Airlines 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.

£441 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

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14:37 - 09:40

GTF

LHR

12h 03m

1 stop

14:05 - 21:34

LHR

GTF

38h 29m

2 stops

£825United Airlines

Wed, 29 Jul - Sat, 8 Aug

06:15 - 11:35

GTF

LHR

22h 20m

2 stops

14:05 - 21:34

LHR

GTF

38h 29m

2 stops

£829United Airlines

Wed, 29 Jul - Sat, 8 Aug

14:37 - 09:40

GTF

LHR

12h 03m

1 stop

09:30 - 21:34

LHR

GTF

43h 04m

2 stops

£910United Airlines

Wed, 10 Jun - Tue, 16 Jun

06:15 - 11:35

GTF

LHR

22h 20m

2 stops

14:05 - 21:34

LHR

GTF

38h 29m

2 stops

£914United Airlines

Wed, 10 Jun - Tue, 16 Jun

14:37 - 09:40

GTF

LHR

12h 03m

1 stop

14:50 - 21:34

LHR

GTF

13h 44m

1 stop

£925United Airlines

Wed, 10 Jun - Tue, 16 Jun

14:37 - 12:35

GTF

LHR

14h 58m

1 stop

11:25 - 21:34

LHR

GTF

17h 09m

1 stop

£949United Airlines

Wed, 29 Jul - Sat, 8 Aug

13:07 - 10:00

GTF

LHR

13h 53m

1 stop

08:40 - 22:40

LHR

GTF

21h 00m

2 stops

£1,027Delta

Wed, 3 Jun - Wed, 10 Jun

18:19 - 10:00

GTF

LHR

32h 41m

1 stop

06:30 - 22:40

LHR

GTF

23h 10m

2 stops

£1,028Delta

Sun, 24 May - Wed, 10 Jun

13:07 - 13:05

GTF

LHR

16h 58m

2 stops

06:30 - 22:40

LHR

GTF

23h 10m

2 stops

£1,030KLM

Tue, 2 Jun - Thu, 11 Jun

13:07 - 13:05

GTF

LHR

16h 58m

2 stops

11:45 - 22:40

LHR

GTF

17h 55m

2 stops

£1,030KLM

Wed, 3 Jun - Wed, 10 Jun

United Airlines flights from Great Falls to London

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

United Airlines

29 Jul

GTF14:37Great Falls

12h 03m

1 stop

LHR09:40London Heathrow

8 Aug

LHR14:05London Heathrow

38h 29m

2 stops

GTF21:34Great Falls

£825

United Airlines

29 Jul

GTF06:15Great Falls

22h 20m

2 stops

LHR11:35London Heathrow

8 Aug

LHR14:05London Heathrow

38h 29m

2 stops

GTF21:34Great Falls

£829

United Airlines

10 Jun

GTF14:37Great Falls

12h 03m

1 stop

LHR09:40London Heathrow

16 Jun

LHR09:30London Heathrow

43h 04m

2 stops

GTF21:34Great Falls

£910

Delta flights from Great Falls to London

Our best Delta deals on Great Falls to London flight tickets

Delta

25 May

GTF13:07Great Falls

13h 53m

1 stop

LHR10:00London Heathrow

12 Jun

LHR08:40London Heathrow

21h 00m

2 stops

GTF22:40Great Falls

£1,027

Delta

24 May

GTF18:19Great Falls

32h 41m

1 stop

LHR10:00London Heathrow

10 Jun

LHR06:30London Heathrow

23h 10m

2 stops

GTF22:40Great Falls

£1,028

Delta

23 May

GTF18:19Great Falls

18h 51m

2 stops

LHR20:10London Heathrow

11 Jun

LHR06:30London Heathrow

18h 14m

2 stops

GTF17:44Great Falls

£1,030

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 29/7

14:37-09:40

1 stop12h 03m

London Heathrow

Sat 8/8

14:05-21:34

2 stops38h 29m

£825

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 29/7

06:15-11:35

2 stops22h 20m

London Heathrow

Sat 8/8

14:05-21:34

2 stops38h 29m

£829

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 10/6

14:37-09:40

1 stop12h 03m

London Heathrow

Tue 16/6

09:30-21:34

2 stops43h 04m

£910

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 10/6

06:15-11:35

2 stops22h 20m

London Heathrow

Tue 16/6

14:05-21:34

2 stops38h 29m

£914

Fastest return journey

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 10/6

14:37-09:40

1 stop12h 03m

London Heathrow

Tue 16/6

14:50-21:34

1 stop13h 44m

£925

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 29/7

14:37-12:35

1 stop14h 58m

London Heathrow

Sat 8/8

11:25-21:34

1 stop17h 09m

£949

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 3/6

13:07-10:00

1 stop13h 53m

London Heathrow

Wed 10/6

08:40-22:40

2 stops21h 00m

£1,027

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 24/5

18:19-10:00

1 stop32h 41m

London Heathrow

Wed 10/6

06:30-22:40

2 stops23h 10m

£1,028

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 2/6

13:07-13:05

2 stops16h 58m

London Heathrow

Thu 11/6

06:30-22:40

2 stops23h 10m

£1,030

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 3/6

13:07-13:05

2 stops16h 58m

London Heathrow

Wed 10/6

11:45-22:40

2 stops17h 55m

£1,030

Flights are sorted by cheapest return flights first.

Showing 1-10 of 16 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 03m
Direct flights	None

The fastest flight from Great Falls to London takes 12h 03m

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 12h 03m, 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

Wembley

Slough

Maidstone

Ipswich

Southend-on-Sea

Canterbury

Ilford

Hayes

Guildford

Folkestone

Chelmsford

Dover

Bedford

Chichester

Harlow

Colchester

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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Cheap flights from Great Falls to London from £441

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Great Falls to London departing on 12/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names, great deals

Big names, great deals

Filter for what you want

Filter for what you want

Trusted and free

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Price Alerts

Price Alerts

Find the cheapest flights from Great Falls to London

Cheap return flights

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United Airlines flights from Great Falls to London

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

Delta flights from Great Falls to London

Our best Delta deals on Great Falls to London flight tickets

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

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

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

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

When to book flights from Great Falls to London

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

Direct flights

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

Complete your trip to London

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