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

Salt Lake City (SLC) was the most common stop: 50% 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.

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

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

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 August 2025.

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.

$628 Cheap Flights from Great Falls to London in 2025

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Find the cheapest flights from Great Falls to London

Round-trip

One-way

Last minute

Cheap round-trip flights

5:40 am - 9:50 amGTF-LHR

21h 10m1 stop

6:15 am - 5:29 pmLHR-GTF

18h 14m2 stops

$628Delta

Find Deal

Mon, Sep 29 - Wed, Oct 8

5:40 am - 9:50 amGTF-LHR

21h 10m1 stop

6:15 am - 5:29 pmLHR-GTF

18h 14m2 stops

$629Delta

Find Deal

Mon, Sep 29 - Wed, Oct 8

6:11 pm - 6:25 amGTF-LHR

29h 14m2 stops

6:15 am - 5:29 pmLHR-GTF

18h 14m2 stops

$633Delta

Find Deal

Mon, Sep 29 - Wed, Oct 8

1:05 pm - 9:50 amGTF-LHR

13h 45m1 stop

11:00 am - 11:06 pmLHR-GTF

19h 06m1 stop

$636KLM

Find Deal

Mon, Sep 29 - Wed, Oct 8

1:08 pm - 10:00 amGTF-LHR

13h 52m1 stop

10:45 am - 5:42 pmLHR-GTF

13h 57m1 stop

$637Delta

Find Deal

Tue, Nov 4 - Wed, Nov 26

1:05 pm - 2:15 pmGTF-LHR

18h 10m2 stops

11:00 am - 11:06 pmLHR-GTF

19h 06m1 stop

$641KLM

Find Deal

Tue, Sep 30 - Wed, Oct 8

1:08 pm - 5:00 pmGTF-LHR

20h 52m2 stops

10:45 am - 5:42 pmLHR-GTF

13h 57m1 stop

$718

Find Deal

Sat, Nov 8 - Thu, Nov 27

7:00 am - 12:20 pmGTF-LHR

22h 20m1 stop

8:30 am - 9:11 pmLHR-GTF

43h 41m2 stops

$730United Airlines

Find Deal

Mon, Sep 29 - Wed, Oct 8

2:30 pm - 9:40 amGTF-LHR

12h 10m1 stop

7:30 am - 10:39 pmLHR-GTF

22h 09m2 stops

$734United Airlines

Find Deal

Tue, Nov 11 - Tue, Nov 25

1:10 pm - 10:00 amGTF-LHR

13h 50m1 stop

10:45 am - 5:42 pmLHR-GTF

13h 57m1 stop

$807

Find Deal

Sat, Nov 15 - Thu, Nov 27

Delta flights from Great Falls to London

Our best Delta deals on Great Falls to London flight tickets

Delta

Sep 29

GTF5:40 amGreat Falls

21h 10m

1 stop

LHR9:50 amLondon Heathrow

Oct 8

LHR6:15 amLondon Heathrow

18h 14m

2 stops

GTF5:29 pmGreat Falls

$628

Find similar

Delta

Sep 29

GTF5:40 amGreat Falls

21h 10m

1 stop

LHR9:50 amLondon Heathrow

Oct 8

LHR6:15 amLondon Heathrow

18h 14m

2 stops

GTF5:29 pmGreat Falls

$629

Find similar

Delta

Sep 29

GTF6:11 pmGreat Falls

29h 14m

2 stops

LHR6:25 amLondon Heathrow

Oct 8

LHR6:15 amLondon Heathrow

18h 14m

2 stops

GTF5:29 pmGreat Falls

$633

Find similar

KLM flights from Great Falls to London

Our best KLM deals on Great Falls to London flight tickets

KLM

Sep 29

GTF1:05 pmGreat Falls

13h 45m

1 stop

LHR9:50 amLondon Heathrow

Oct 8

LHR11:00 amLondon Heathrow

19h 06m

1 stop

GTF11:06 pmGreat Falls

$636

Find similar

KLM

Sep 30

GTF1:05 pmGreat Falls

18h 10m

2 stops

LHR2:15 pmLondon Heathrow

Oct 8

LHR11:00 amLondon Heathrow

19h 06m

1 stop

GTF11:06 pmGreat Falls

$641

Find similar

KLM

Sep 30

GTF1:05 pmGreat Falls

13h 45m

1 stop

LHR9:50 amLondon Heathrow

Oct 8

LHR11:00 amLondon Heathrow

13h 29m

1 stop

GTF5:29 pmGreat Falls

$733

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/29

5:40 am-9:50 am

1 stop21h 10m

London Heathrow

Wed 10/8

6:15 am-5:29 pm

2 stops18h 14m

$628

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/29

5:40 am-9:50 am

1 stop21h 10m

London Heathrow

Wed 10/8

6:15 am-5:29 pm

2 stops18h 14m

$629

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/29

6:11 pm-6:25 am

2 stops29h 14m

London Heathrow

Wed 10/8

6:15 am-5:29 pm

2 stops18h 14m

$633

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/29

1:05 pm-9:50 am

1 stop13h 45m

London Heathrow

Wed 10/8

11:00 am-11:06 pm

1 stop19h 06m

$636

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 11/4

1:08 pm-10:00 am

1 stop13h 52m

London Heathrow

Wed 11/26

10:45 am-5:42 pm

1 stop13h 57m

$637

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 9/30

1:05 pm-2:15 pm

2 stops18h 10m

London Heathrow

Wed 10/8

11:00 am-11:06 pm

1 stop19h 06m

$641

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 11/8

1:08 pm-5:00 pm

2 stops20h 52m

London Heathrow

Thu 11/27

10:45 am-5:42 pm

1 stop13h 57m

$718

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/29

7:00 am-12:20 pm

1 stop22h 20m

London Heathrow

Wed 10/8

8:30 am-9:11 pm

2 stops43h 41m

$730

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 11/11

2:30 pm-9:40 am

1 stop12h 10m

London Heathrow

Tue 11/25

7:30 am-10:39 pm

2 stops22h 09m

$734

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 11/15

1:10 pm-10:00 am

1 stop13h 50m

London Heathrow

Thu 11/27

10:45 am-5:42 pm

1 stop13h 57m

$807

Flights are sorted by cheapest round-trip flights first.

Sorted 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

Layovers

What is the cheapest day to depart on your flight to London?

The cheapest day to depart from Great Falls to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $672. If your travel schedule is flexible, try to avoid departing on a Tuesday because tickets tend to average around $1,371. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

What is the cheapest time of day to depart on your flight to London?

Flying to London from Great Falls at noon is the least expensive time of day to depart. momondo users have found prices as low as $778 when looking at flights departing at noon. Flights to London are more costly in the morning, with an average ticket price of $813. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

Direct flights	None

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 distance between Great Falls and London is about 4477.2 mi. 12h 10m 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 August 2025.
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.
What is the most popular airline from Great Falls to London?
momondo data reveals that the most frequently booked airline on the route from Great Falls to London is United Airlines, representing 100% of all bookings.

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 8,928 reviews		Search United Airlines flights

Hounslow

Gatwick

Luton

Dover

Slough

Milton Keynes

Guildford

Dartford

Crawley

Hayes

Chelmsford

Stansted

Brentwood

Ilford

Folkestone

Colchester

Watford

Richmond

Canterbury

Croydon

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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Find better results for your trip to the United Kingdom

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

Popular cities in the United Kingdom

Flights to Manchesterfrom $383

Flights to Edinburghfrom $411

Flights to Birminghamfrom $429

Flights to Glasgowfrom $405

Flights to Belfastfrom $499

Flights to Newcastle upon Tynefrom $479

Flights to Bristolfrom $456

Flights to Invernessfrom $409

Flights to Liverpoolfrom $450

Flights to Aberdeenfrom $518

Flights to Leedsfrom $468

Flights to Cardifffrom $587

Cheap flights from Great Falls to London from $628

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Great Falls to London departing on 9/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Great Falls to London

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Delta flights from Great Falls to London

Our best Delta deals on Great Falls to London flight tickets

KLM flights from Great Falls to London

Our best KLM deals on Great Falls to London flight tickets

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Use the filters below to find and compare flights from Great Falls to London that are best for you.

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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

What is the cheapest day to depart on your flight to London?

What is the cheapest time of day to depart on your flight to London?

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

Salt Lake City (SLC) was the most common stop: 50% of momondo users choosing 1-stop flights on this route connected there.

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 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 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

Direct flights

How far is Great Falls to London by plane?

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

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

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

What documentation or ID do you need to fly to London?

What is the most popular airline 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?

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

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

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

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

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