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

United Airlines is the most popular carrier 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.

£291 Cheap Flights from Great Falls to London in 2026

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Find the cheapest flights from Great Falls to London

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06:15 - 09:40

GTF

LHR

20h 25m

1 stop

07:25 - 21:18

LHR

GTF

20h 53m

2 stops

£665United Airlines

Wed, 22 Apr - Thu, 30 Apr

06:15 - 06:30

GTF

LHR

17h 15m

2 stops

07:25 - 21:18

LHR

GTF

20h 53m

2 stops

£668United Airlines

Wed, 22 Apr - Thu, 30 Apr

06:15 - 09:40

GTF

LHR

20h 25m

1 stop

14:05 - 21:15

LHR

GTF

38h 10m

2 stops

£671United Airlines

Mon, 27 Apr - Thu, 15 Oct

06:15 - 09:40

GTF

LHR

20h 25m

1 stop

16:25 - 21:17

LHR

GTF

35h 52m

2 stops

£673United Airlines

Wed, 22 Apr - Mon, 27 Apr

06:15 - 10:00

GTF

LHR

20h 45m

2 stops

14:05 - 21:15

LHR

GTF

38h 10m

2 stops

£674United Airlines

Mon, 27 Apr - Thu, 15 Oct

06:15 - 06:30

GTF

LHR

17h 15m

2 stops

16:25 - 21:18

LHR

GTF

35h 53m

2 stops

£675United Airlines

Wed, 22 Apr - Wed, 29 Apr

14:30 - 09:40

GTF

LHR

12h 10m

1 stop

14:50 - 21:17

LHR

GTF

13h 27m

1 stop

£686United Airlines

Wed, 22 Apr - Tue, 28 Apr

06:15 - 11:35

GTF

LHR

22h 20m

2 stops

08:00 - 21:17

LHR

GTF

20h 17m

3 stops

£689United Airlines

Wed, 22 Apr - Wed, 29 Apr

18:15 - 06:50

GTF

LHR

29h 35m

2 stops

09:50 - 16:13

LHR

GTF

13h 23m

1 stop

£693Multiple Airlines

Mon, 27 Apr - Thu, 15 Oct

18:15 - 06:50

GTF

LHR

29h 35m

2 stops

16:25 - 16:13

LHR

GTF

30h 48m

2 stops

£698Multiple Airlines

Mon, 27 Apr - Thu, 15 Oct

United Airlines flights from Great Falls to London

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

United Airlines

22 Apr

GTF06:15Great Falls

20h 25m

1 stop

LHR09:40London Heathrow

30 Apr

LHR07:25London Heathrow

20h 53m

2 stops

GTF21:18Great Falls

£665

United Airlines

22 Apr

GTF06:15Great Falls

17h 15m

2 stops

LHR06:30London Heathrow

30 Apr

LHR07:25London Heathrow

20h 53m

2 stops

GTF21:18Great Falls

£668

United Airlines

27 Apr

GTF06:15Great Falls

20h 25m

1 stop

LHR09:40London Heathrow

15 Oct

LHR14:05London Heathrow

38h 10m

2 stops

GTF21:15Great Falls

£671

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 22/4

06:15-09:40

1 stop20h 25m

London Heathrow

Thu 30/4

07:25-21:18

2 stops20h 53m

£665

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 22/4

06:15-06:30

2 stops17h 15m

London Heathrow

Thu 30/4

07:25-21:18

2 stops20h 53m

£668

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 27/4

06:15-09:40

1 stop20h 25m

London Heathrow

Thu 15/10

14:05-21:15

2 stops38h 10m

£671

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 22/4

06:15-09:40

1 stop20h 25m

London Heathrow

Mon 27/4

16:25-21:17

2 stops35h 52m

£673

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 27/4

06:15-10:00

2 stops20h 45m

London Heathrow

Thu 15/10

14:05-21:15

2 stops38h 10m

£674

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 22/4

06:15-06:30

2 stops17h 15m

London Heathrow

Wed 29/4

16:25-21:18

2 stops35h 53m

£675

Fastest return journey

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 22/4

14:30-09:40

1 stop12h 10m

London Heathrow

Tue 28/4

14:50-21:17

1 stop13h 27m

£686

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 22/4

06:15-11:35

2 stops22h 20m

London Heathrow

Wed 29/4

08:00-21:17

3 stops20h 17m

£689

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 27/4

18:15-06:50

2 stops29h 35m

London Heathrow

Thu 15/10

09:50-16:13

1 stop13h 23m

£693

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 27/4

18:15-06:50

2 stops29h 35m

London Heathrow

Thu 15/10

16:25-16:13

2 stops30h 48m

£698

Flights are sorted by cheapest return flights first.

Showing 1-10 of 13 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	20h 25m
Direct flights	None

The fastest flight from Great Falls to London takes 20h 25m

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

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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 20h 25m, 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

Southend-on-Sea

Ipswich

Wembley

Canterbury

Ilford

Guildford

Hayes

Chelmsford

Dover

Folkestone

Ramsgate

Chichester

Bedford

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.

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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 £291

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 25/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Big names, great deals

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Filter for what you want

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United Airlines flights from Great Falls to London

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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

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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