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Cheap flights from Great Falls to London from £287

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 19/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
United Airlines Logo
06:10 - 09:40GTF-LHR
20h 30m1 stop
United Airlines Logo
11:10 - 21:53LHR-GTF
41h 43m2 stops
£482United Airlines
Find Deal
Sat, 10 Jan - Sat, 17 Jan
United Airlines Logo
06:10 - 11:05GTF-LHR
21h 55m2 stops
United Airlines Logo
11:10 - 13:48LHR-GTF
33h 38m2 stops
£486United Airlines
Find Deal
Sat, 10 Jan - Sat, 17 Jan
United Airlines Logo
14:29 - 09:40GTF-LHR
12h 11m1 stop
United Airlines Logo
11:35 - 21:43LHR-GTF
17h 08m1 stop
£495United Airlines
Find Deal
Sat, 10 Jan - Sat, 17 Jan

United Airlines flights from Great Falls to London Heathrow Airport

Our best United Airlines deals on Great Falls to London Heathrow Airport flight tickets
United Airlines
10 Jan
GTF06:10Great Falls
20h 30m
1 stop
LHR09:40London Heathrow
17 Jan
LHR11:10London Heathrow
41h 43m
2 stops
GTF21:53Great Falls
£482
Find similar
United Airlines
10 Jan
GTF06:10Great Falls
21h 55m
2 stops
LHR11:05London Heathrow
17 Jan
LHR11:10London Heathrow
33h 38m
2 stops
GTF13:48Great Falls
£486
Find similar
United Airlines
10 Jan
GTF14:29Great Falls
12h 11m
1 stop
LHR09:40London Heathrow
17 Jan
LHR11:35London Heathrow
17h 08m
1 stop
GTF21:43Great Falls
£495
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Great Falls to London Heathrow Airport 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 27 November 2025.
Use the filters below to find and compare flights from Great Falls to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 10/1

06:10-09:40

1 stop20h 30m

London Heathrow

Sat 17/1

11:10-21:53

2 stops41h 43m

£482

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 10/1

06:10-11:05

2 stops21h 55m

London Heathrow

Sat 17/1

11:10-13:48

2 stops33h 38m

£486

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 10/1

14:29-09:40

1 stop12h 11m

London Heathrow

Sat 17/1

11:35-21:43

1 stop17h 08m

£495

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 19/4

14:30-12:20

1 stop14h 50m

£287

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

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

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 Heathrow Airport flights?

You could potentially save up to 1% on your flight if you consider stops on a Great Falls to London Heathrow Airport flight.

When to book flights from Great Falls to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Great Falls to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Great Falls to London Heathrow Airport (GTF to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Great Falls to London Heathrow Airport

Fastest flight time

12h 10m

Direct flights

None
The fastest flight from Great Falls to London Heathrow Airport takes 12h 10m
There are no direct flights from Great Falls to London Heathrow Airport. There are no popular flight routes from Great Falls to London Heathrow Airport.
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  • How far is Great Falls to London Heathrow by plane?

    The distance between Great Falls and London Heathrow is about 4468.7 mi. Flights usually cover this in 12h 11m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Great Falls Airport to London Heathrow Airport?

    Prices for flights from Great Falls Airport to London Heathrow Airport are refreshed on a daily basis.

  • How old do you have to be to fly from Great Falls Airport to London Heathrow Airport?

    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 Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents you'll need for your trip to London Heathrow Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at London Heathrow Airport. It is always advisable to seek advice from your airline or a trusted 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
Maidstone
Slough
Northampton
Swindon
Stratford-upon-Avon
Canterbury
Southend-on-Sea
Ipswich
Ilford
Poole
Guildford
Swanage
Hayes
Dover
Chelmsford
Colchester

Why use momondo?

Why should I use momondo to find a flight deal from Great Falls to London?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Great Falls to London . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Great Falls to London with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to London from Great Falls with this policy.

How can momondo help me find flights from Great Falls to London?

Once you have performed a search for Great Falls to London flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Great Falls to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from Great Falls are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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