Cheap flights from Great Falls to London from £656

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 8/11. 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
1 adult, Economy, 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
06:30 - 09:40
GTF
-
LHR
20h 10m
1 stop
United Airlines Logo
06:35 - 21:47
LHR
-
GTF
22h 12m
2 stops
£656United Airlines
Sun, 8 Nov - Thu, 12 Nov
United Airlines Logo
06:30 - 09:40
GTF
-
LHR
20h 10m
1 stop
United Airlines Logo
06:35 - 21:47
LHR
-
GTF
22h 12m
2 stops
£657United Airlines
Sun, 8 Nov - Thu, 12 Nov
United Airlines Logo
06:30 - 07:10
GTF
-
LHR
17h 40m
2 stops
United Airlines Logo
06:35 - 21:47
LHR
-
GTF
22h 12m
2 stops
£659United Airlines
Sun, 8 Nov - Thu, 12 Nov
Alaska Airlines Logo
16:57 - 12:20
GTF
-
LHR
12h 23m
1 stop
Alaska Airlines Logo
14:45 - 16:17
LHR
-
GTF
32h 32m
1 stop
£665Alaska Airlines
Sun, 8 Nov - Thu, 12 Nov
Alaska Airlines Logo
16:57 - 12:20
GTF
-
LHR
12h 23m
1 stop
Alaska Airlines Logo
14:45 - 16:17
LHR
-
GTF
32h 32m
1 stop
£665Alaska Airlines
Sun, 8 Nov - Thu, 12 Nov
United Airlines Logo
14:25 - 09:40
GTF
-
LHR
12h 15m
1 stop
United Airlines Logo
06:55 - 21:12
LHR
-
GTF
21h 17m
2 stops
£739United Airlines
Thu, 13 Aug - Thu, 20 Aug
United Airlines Logo
06:15 - 07:15
GTF
-
LHR
18h 00m
2 stops
United Airlines Logo
06:55 - 21:12
LHR
-
GTF
21h 17m
2 stops
£743United Airlines
Thu, 13 Aug - Thu, 20 Aug
United Airlines Logo
14:25 - 09:40
GTF
-
LHR
12h 15m
1 stop
United Airlines Logo
14:50 - 21:12
LHR
-
GTF
13h 22m
1 stop
£761United Airlines
Thu, 13 Aug - Thu, 20 Aug
Delta Logo
05:40 - 10:00
GTF
-
LHR
21h 20m
1 stop
Delta Logo
06:30 - 12:28
LHR
-
GTF
36h 58m
2 stops
£996Delta
Mon, 17 Aug - Fri, 21 Aug
United Airlines Logo
14:25 - 12:25
GTF
-
LHR
15h 00m
1 stop
United Airlines Logo
14:50 - 21:12
LHR
-
GTF
13h 22m
1 stop
£1,018United Airlines
Mon, 17 Aug - Fri, 21 Aug

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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
8 Nov
GTF06:30Great Falls
20h 10m
1 stop
LHR09:40London Heathrow
12 Nov
LHR06:35London Heathrow
22h 12m
2 stops
GTF21:47Great Falls
£656
United Airlines
8 Nov
GTF06:30Great Falls
20h 10m
1 stop
LHR09:40London Heathrow
12 Nov
LHR06:35London Heathrow
22h 12m
2 stops
GTF21:47Great Falls
£657
United Airlines
8 Nov
GTF06:30Great Falls
17h 40m
2 stops
LHR07:10London Heathrow
12 Nov
LHR06:35London Heathrow
22h 12m
2 stops
GTF21:47Great Falls
£659

Delta flights from Great Falls to London

Our best Delta deals on Great Falls to London flight tickets
Delta
17 Aug
GTF05:40Great Falls
21h 20m
1 stop
LHR10:00London Heathrow
21 Aug
LHR06:30London Heathrow
36h 58m
2 stops
GTF12:28Great Falls
£996
Delta
16 Jul
GTF13:17Great Falls
16h 48m
2 stops
LHR13:05London Heathrow
29 Jul
LHR16:20London Heathrow
27h 17m
2 stops
GTF12:37Great Falls
£1,068
Delta
2 Aug
GTF18:25Great Falls
29h 45m
2 stops
LHR07:10London Heathrow
8 Aug
LHR08:20London Heathrow
21h 18m
2 stops
GTF22:38Great Falls
£3,181

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 3 July 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

Cheapest return flight

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 8/11

06:30-09:40

1 stop20h 10m

London Heathrow

Thu 12/11

06:35-21:47

2 stops22h 12m

£656

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 8/11

06:30-09:40

1 stop20h 10m

London Heathrow

Thu 12/11

06:35-21:47

2 stops22h 12m

£657

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 8/11

06:30-07:10

2 stops17h 40m

London Heathrow

Thu 12/11

06:35-21:47

2 stops22h 12m

£659

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 8/11

16:57-12:20

1 stop12h 23m

London Heathrow

Thu 12/11

14:45-16:17

1 stop32h 32m

£665

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 8/11

16:57-12:20

1 stop12h 23m

London Heathrow

Thu 12/11

14:45-16:17

1 stop32h 32m

£665

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 13/8

14:25-09:40

1 stop12h 15m

London Heathrow

Thu 20/8

06:55-21:12

2 stops21h 17m

£739

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 13/8

06:15-07:15

2 stops18h 00m

London Heathrow

Thu 20/8

06:55-21:12

2 stops21h 17m

£743
Fastest return journey

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 13/8

14:25-09:40

1 stop12h 15m

London Heathrow

Thu 20/8

14:50-21:12

1 stop13h 22m

£761

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 17/8

05:40-10:00

1 stop21h 20m

London Heathrow

Fri 21/8

06:30-12:28

2 stops36h 58m

£996

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 17/8

14:25-12:25

1 stop15h 00m

London Heathrow

Fri 21/8

14:50-21:12

1 stop13h 22m

£1,018

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

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.

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 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.

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.

Travelling to a place near London?

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

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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1 adult
Sun 2/8
Sun 9/8

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