Which layover airport offers the lowest fares from Great Falls to London?

Flights via Denver (DEN) offer the lowest average round-trip price of $697.

Which layover airport has the shortest travel time from Great Falls to London?

Flights connecting via Denver (DEN) have the shortest average one-way travel time: 12h 05m.

Which airport is the most popular layover for flights between Great Falls and London?

Salt Lake City (SLC) was the most common stop: 75% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest connection time from Great Falls to London?

Denver (DEN) has the shortest average layover time for this route: 1h 33m.

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

Prices for flights from Great Falls Airport to London are updated daily.

How many operators does momondo search for flights from Great Falls Airport to London?

There is 1 operator available for flights from Great Falls Airport to London as of April 2026.

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 travel and health documents you'll need for your trip to London 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$624 Cheap Flights from Great Falls to London in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Great Falls to London

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

2:25 pm - 9:40 am

GTF

LHR

12h 15m

1 stop

7:45 am - 9:21 pm

LHR

GTF

20h 36m

2 stops

$1,013United Airlines

pe, loka 9 - la, loka 17

2:25 pm - 8:35 am

GTF

LHR

59h 10m

2 stops

7:45 am - 9:21 pm

LHR

GTF

20h 36m

2 stops

$1,055United Airlines

pe, loka 9 - la, loka 17

6:20 pm - 10:00 am

GTF

LHR

32h 40m

1 stop

10:55 am - 10:53 pm

LHR

GTF

18h 58m

1 stop

$1,068KLM

pe, loka 9 - la, loka 17

6:15 am - 9:40 am

GTF

LHR

20h 25m

1 stop

6:55 am - 9:34 pm

LHR

GTF

21h 39m

2 stops

$1,224United Airlines

ke, kesä 3 - ke, kesä 10

6:15 am - 6:30 am

GTF

LHR

17h 15m

2 stops

7:25 am - 9:34 pm

LHR

GTF

21h 09m

2 stops

$1,227United Airlines

ke, kesä 3 - ke, kesä 10

6:15 am - 10:00 am

GTF

LHR

20h 45m

2 stops

5:40 pm - 9:34 pm

LHR

GTF

34h 54m

2 stops

$1,240United Airlines

ke, heinä 8 - ke, heinä 22

6:15 am - 9:40 am

GTF

LHR

20h 25m

1 stop

2:50 pm - 9:34 pm

LHR

GTF

13h 44m

1 stop

$1,241United Airlines

ke, kesä 3 - ke, kesä 10

6:15 am - 9:40 am

GTF

LHR

20h 25m

1 stop

9:30 am - 9:34 pm

LHR

GTF

43h 04m

2 stops

$1,292United Airlines

su, kesä 7 - su, kesä 14

6:15 am - 10:00 am

GTF

LHR

20h 45m

2 stops

9:30 am - 9:34 pm

LHR

GTF

43h 04m

2 stops

$1,295United Airlines

su, kesä 7 - su, kesä 14

6:15 am - 9:40 am

GTF

LHR

20h 25m

1 stop

2:50 pm - 9:34 pm

LHR

GTF

13h 44m

1 stop

$1,312United Airlines

su, kesä 7 - su, kesä 14

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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

Oct 9

GTF2:25 pmGreat Falls

12h 15m

1 stop

LHR9:40 amLondon Heathrow

Oct 17

LHR7:45 amLondon Heathrow

20h 36m

2 stops

GTF9:21 pmGreat Falls

$1,013

United Airlines

Oct 9

GTF2:25 pmGreat Falls

59h 10m

2 stops

LHR8:35 amLondon Heathrow

Oct 17

LHR7:45 amLondon Heathrow

20h 36m

2 stops

GTF9:21 pmGreat Falls

$1,055

United Airlines

Jun 3

GTF6:15 amGreat Falls

20h 25m

1 stop

LHR9:40 amLondon Heathrow

Jun 10

LHR6:55 amLondon Heathrow

21h 39m

2 stops

GTF9:34 pmGreat Falls

$1,224

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

pe 10/9

2:25 pm-9:40 am

1 stop12h 15m

London Heathrow

la 10/17

7:45 am-9:21 pm

2 stops20h 36m

$1,013

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

pe 10/9

2:25 pm-8:35 am

2 stops59h 10m

London Heathrow

la 10/17

7:45 am-9:21 pm

2 stops20h 36m

$1,055

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

pe 10/9

6:20 pm-10:00 am

1 stop32h 40m

London Heathrow

la 10/17

10:55 am-10:53 pm

1 stop18h 58m

$1,068

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

ke 6/3

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

ke 6/10

6:55 am-9:34 pm

2 stops21h 39m

$1,224

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

ke 6/3

6:15 am-6:30 am

2 stops17h 15m

London Heathrow

ke 6/10

7:25 am-9:34 pm

2 stops21h 09m

$1,227

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

ke 7/8

6:15 am-10:00 am

2 stops20h 45m

London Heathrow

ke 7/22

5:40 pm-9:34 pm

2 stops34h 54m

$1,240

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

ke 6/3

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

ke 6/10

2:50 pm-9:34 pm

1 stop13h 44m

$1,241

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

su 6/7

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

su 6/14

9:30 am-9:34 pm

2 stops43h 04m

$1,292

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

su 6/7

6:15 am-10:00 am

2 stops20h 45m

London Heathrow

su 6/14

9:30 am-9:34 pm

2 stops43h 04m

$1,295

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

su 6/7

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

su 6/14

2:50 pm-9:34 pm

1 stop13h 44m

$1,312

Flights are sorted by cheapest round-trip 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

Airlines

Layovers

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 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 round-trip 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

Frequently asked questions about flying from Great Falls to London

How far is Great Falls to London by plane?
The distance between Great Falls and London is about 4477.2 mi. 12h 15m is a normal flight duration for this route.
When did momondo last update prices for flights from Great Falls Airport to London?
Prices for flights from Great Falls Airport to London are updated daily.
How many operators does momondo search for flights from Great Falls Airport to London?
There is 1 operator available for flights from Great Falls Airport to London as of April 2026.
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 travel and health documents you'll need for your trip to London 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. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Great Falls to London

Compare and see reviews for airlines that fly from Great Falls to London with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $645	Free Cancellation	Rating 7.4 9,643 reviews		Search United Airlines flights

Hounslow

Gatwick

Milton Keynes

Dover

Luton

Hayes

Crawley

Slough

Wembley

Stansted

Watford

Croydon

Brentwood

Dartford

Cobham

Folkestone

Guildford

Romford

Harrow

Uxbridge

Why use momondo?

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

Finding the right flight to London from Great Falls is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

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?

Yes momondo offers price alerts on flights to London from Great Falls. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your London trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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su 5/24

su 5/31

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Find better results for your trip to the United Kingdom

Nearby airports

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Other United Kingdom destinations

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Complete your trip

Feeling lucky

Fly into one of these airports located in London

London City Airport

London Gatwick Airport

London Heathrow Airport

London Luton Airport

London Southend Airport

London Stansted Airport

Cheap flights from Great Falls to London from $624

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 5/15. 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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United Airlines flights from Great Falls to London

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

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

Which airport is the most popular layover for flights between Great Falls and London?

Which layover airport offers the lowest fares from Great Falls to London?

Which layover airport has the shortest travel time from Great Falls to London?

Which layover airport has the shortest connection time 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

Best airlines flying from Great Falls to London

Compare and see reviews for airlines that fly from Great Falls to London with momondo

Traveling to a place near London?

Why use momondo?

An easier way to manage your London trip

We make it super easy to schedule, organize 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

Fly your favorite airline to London

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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

Fly to other destinations from Great Falls

According to popular flight searches on momondo this year

Complete your trip to London

Explore popular destinations other users love

According to popular flight searches on momondo this year