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Cheap flights from Great Falls to London from £293

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 10/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Find the cheapest flights from Great Falls to London

Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
06:15 - 12:20
GTF
-
LHR
23h 05m
1 stop
United Airlines Logo
07:25 - 21:18
LHR
-
GTF
20h 53m
2 stops
£549United Airlines
Fri, 1 May - Sun, 10 May
United Airlines Logo
14:35 - 06:30
GTF
-
LHR
32h 55m
2 stops
United Airlines Logo
07:25 - 21:18
LHR
-
GTF
20h 53m
2 stops
£552United Airlines
Fri, 1 May - Sun, 10 May
United Airlines Logo
14:35 - 12:20
GTF
-
LHR
14h 45m
1 stop
United Airlines Logo
11:25 - 21:18
LHR
-
GTF
16h 53m
1 stop
£571United Airlines
Fri, 1 May - Sun, 10 May
United Airlines Logo
14:25 - 09:40
GTF
-
LHR
12h 15m
1 stop
United Airlines Logo
11:10 - 21:33
LHR
-
GTF
41h 23m
2 stops
£621United Airlines
Wed, 25 Feb - Sun, 1 Mar
United Airlines Logo
06:25 - 09:40
GTF
-
LHR
20h 15m
1 stop
United Airlines Logo
11:10 - 21:33
LHR
-
GTF
41h 23m
2 stops
£622United Airlines
Wed, 25 Feb - Sun, 1 Mar
United Airlines Logo
06:25 - 07:30
GTF
-
LHR
18h 05m
2 stops
United Airlines Logo
11:10 - 21:33
LHR
-
GTF
41h 23m
2 stops
£624United Airlines
Wed, 25 Feb - Sun, 1 Mar
United Airlines Logo
06:25 - 11:15
GTF
-
LHR
21h 50m
2 stops
United Airlines Logo
11:10 - 21:33
LHR
-
GTF
41h 23m
2 stops
£625United Airlines
Wed, 25 Feb - Sun, 1 Mar
United Airlines Logo
06:25 - 07:55
GTF
-
LHR
18h 30m
2 stops
United Airlines Logo
13:00 - 21:33
LHR
-
GTF
39h 33m
2 stops
£626United Airlines
Wed, 25 Feb - Sun, 1 Mar
United Airlines Logo
06:25 - 07:55
GTF
-
LHR
18h 30m
2 stops
United Airlines Logo
13:00 - 21:33
LHR
-
GTF
39h 33m
2 stops
£627United Airlines
Wed, 25 Feb - Sun, 1 Mar
United Airlines Logo
14:25 - 09:40
GTF
-
LHR
12h 15m
1 stop
United Airlines Logo
11:35 - 21:33
LHR
-
GTF
16h 58m
1 stop
£632United Airlines
Wed, 25 Feb - Sun, 1 Mar

United Airlines flights from Great Falls to London

Our best United Airlines deals on Great Falls to London flight tickets
United Airlines
1 May
GTF06:15Great Falls
23h 05m
1 stop
LHR12:20London Heathrow
10 May
LHR07:25London Heathrow
20h 53m
2 stops
GTF21:18Great Falls
£549
United Airlines
1 May
GTF14:35Great Falls
32h 55m
2 stops
LHR06:30London Heathrow
10 May
LHR07:25London Heathrow
20h 53m
2 stops
GTF21:18Great Falls
£552
United Airlines
1 May
GTF14:35Great Falls
14h 45m
1 stop
LHR12:20London Heathrow
10 May
LHR11:25London Heathrow
16h 53m
1 stop
GTF21:18Great Falls
£571

momondo Fare Finder

 
Customise your flight search to find flights from Great Falls to London that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 279,928 searches. Data last updated 9 February 2026.
Use the filters below to find and compare flights from Great Falls to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 1/5

06:15-12:20

1 stop23h 05m

London Heathrow

Sun 10/5

07:25-21:18

2 stops20h 53m

£549

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 1/5

14:35-06:30

2 stops32h 55m

London Heathrow

Sun 10/5

07:25-21:18

2 stops20h 53m

£552

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 1/5

14:35-12:20

1 stop14h 45m

London Heathrow

Sun 10/5

11:25-21:18

1 stop16h 53m

£571

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 25/2

14:25-09:40

1 stop12h 15m

London Heathrow

Sun 1/3

11:10-21:33

2 stops41h 23m

£621

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 25/2

06:25-09:40

1 stop20h 15m

London Heathrow

Sun 1/3

11:10-21:33

2 stops41h 23m

£622

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 25/2

06:25-07:30

2 stops18h 05m

London Heathrow

Sun 1/3

11:10-21:33

2 stops41h 23m

£624

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 25/2

06:25-11:15

2 stops21h 50m

London Heathrow

Sun 1/3

11:10-21:33

2 stops41h 23m

£625

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 25/2

06:25-07:55

2 stops18h 30m

London Heathrow

Sun 1/3

13:00-21:33

2 stops39h 33m

£626

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 25/2

06:25-07:55

2 stops18h 30m

London Heathrow

Sun 1/3

13:00-21:33

2 stops39h 33m

£627

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 25/2

14:25-09:40

1 stop12h 15m

London Heathrow

Sun 1/3

11:35-21:33

1 stop16h 58m

£632

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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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

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 15m

Direct flights

None
The fastest flight from Great Falls to London takes 12h 15m
There are no direct flights from Great Falls to London. There are no popular flight routes from Great Falls to London.
Search flight deals

  • 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 15m, 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.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Eastbourne
Milton Keynes
Luton
Gatwick
Slough
Maidstone
Southend-on-Sea
Canterbury
Ipswich
Ilford
Guildford
Chelmsford
Hayes
Wembley
Dover
Folkestone
Colchester
Bedford
Worthing
Ramsgate

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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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
London City Airport
London Gatwick Airport
London Heathrow Airport
London Luton Airport
London Southend Airport
London Stansted Airport