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

Delta, KLM, and United Airlines are the most popular carriers operating from Great Falls to United Kingdom

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

Prices for flights from Great Falls Airport to United Kingdom were last updated today.

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

There is 1 operator available for flights from Great Falls Airport to United Kingdom as of May 2026.

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

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Great Falls Airport to United Kingdom.

What documentation or ID do you need to fly to United Kingdom?

The necessary travel and health documents for your United Kingdom trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$334 Cheap Flights from Great Falls to the United Kingdom in 2026

1 adult

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Find the cheapest flights from Great Falls to the United Kingdom

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:15 am - 10:00 am

GTF

LHR

20h 45m

2 stops

6:55 am - 9:12 pm

LHR

GTF

21h 17m

2 stops

$755United Airlines

Mon, Aug 17 - Wed, Aug 19

2:25 pm - 12:25 pm

GTF

LHR

15h 00m

1 stop

6:55 am - 9:12 pm

LHR

GTF

21h 17m

2 stops

$834United Airlines

Mon, Aug 17 - Wed, Aug 19

6:15 am - 8:05 am

GTF

EDI

18h 50m

2 stops

9:00 am - 9:21 pm

EDI

GTF

43h 21m

2 stops

$860United Airlines

Tue, Oct 20 - Fri, Oct 23

6:15 am - 8:25 am

GTF

EDI

19h 10m

2 stops

9:00 am - 9:21 pm

EDI

GTF

43h 21m

2 stops

$861United Airlines

Tue, Oct 20 - Fri, Oct 23

1:08 pm - 10:00 am

GTF

LHR

13h 52m

1 stop

6:30 am - 5:42 pm

LHR

GTF

18h 12m

2 stops

$875Delta

Mon, Aug 17 - Thu, Aug 20

6:28 pm - 6:20 am

GTF

LHR

28h 52m

2 stops

6:30 am - 5:42 pm

LHR

GTF

18h 12m

2 stops

$880Delta

Mon, Aug 17 - Thu, Aug 20

5:40 am - 10:00 am

GTF

LHR

21h 20m

1 stop

10:55 am - 10:48 pm

LHR

GTF

18h 53m

1 stop

$904Delta

Mon, Aug 17 - Thu, Aug 20

6:20 pm - 10:00 am

GTF

LHR

32h 40m

1 stop

6:30 am - 10:44 pm

LHR

GTF

23h 14m

2 stops

$928KLM

Sun, Sep 13 - Sat, Sep 19

6:20 pm - 7:25 pm

GTF

LHR

18h 05m

2 stops

6:30 am - 10:44 pm

LHR

GTF

23h 14m

2 stops

$937KLM

Sun, Sep 13 - Sat, Sep 19

6:25 pm - 11:10 pm

GTF

EDI

21h 45m

2 stops

2:05 pm - 5:44 pm

EDI

GTF

34h 39m

2 stops

$1,517KLM

Mon, Jun 15 - Sun, Jun 21

United Airlines flights from Great Falls to United Kingdom

Our best United Airlines deals on Great Falls to United Kingdom flight tickets

United Airlines

Aug 17

GTF6:15 amGreat Falls

20h 45m

2 stops

LHR10:00 amLondon Heathrow

Aug 19

LHR6:55 amLondon Heathrow

21h 17m

2 stops

GTF9:12 pmGreat Falls

$755

United Airlines

Aug 17

GTF2:25 pmGreat Falls

15h 00m

1 stop

LHR12:25 pmLondon Heathrow

Aug 19

LHR6:55 amLondon Heathrow

21h 17m

2 stops

GTF9:12 pmGreat Falls

$834

United Airlines

Oct 20

GTF6:15 amGreat Falls

18h 50m

2 stops

EDI8:05 amEdinburgh Turnhouse

Oct 23

EDI9:00 amEdinburgh Turnhouse

43h 21m

2 stops

GTF9:21 pmGreat Falls

$860

Alaska Airlines flights from Great Falls to United Kingdom

Our best Alaska Airlines deals on Great Falls to United Kingdom flight tickets

Alaska Airlines

Aug 16

GTF5:09 pmGreat Falls

14h 56m

1 stop

LHR3:05 pmLondon Heathrow

Aug 20

LHR5:00 pmLondon Heathrow

30h 38m

1 stop

GTF4:38 pmGreat Falls

$1,144

Alaska Airlines

Aug 15

GTF5:09 pmGreat Falls

14h 56m

1 stop

LHR3:05 pmLondon Heathrow

Aug 19

LHR5:00 pmLondon Heathrow

30h 38m

1 stop

GTF4:38 pmGreat Falls

$1,214

Alaska Airlines

Aug 11

GTF5:09 pmGreat Falls

14h 56m

1 stop

LHR3:05 pmLondon Heathrow

Aug 15

LHR5:00 pmLondon Heathrow

30h 29m

1 stop

GTF4:29 pmGreat Falls

$1,215

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 8/17

6:15 am-10:00 am

2 stops20h 45m

London Heathrow

Wed 8/19

6:55 am-9:12 pm

2 stops21h 17m

$755

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 8/17

2:25 pm-12:25 pm

1 stop15h 00m

London Heathrow

Wed 8/19

6:55 am-9:12 pm

2 stops21h 17m

$834

Great FallsEdinburgh

GTF - EDI

GTFEDI

Great Falls

Tue 10/20

6:15 am-8:05 am

2 stops18h 50m

Edinburgh Turnhouse

Fri 10/23

9:00 am-9:21 pm

2 stops43h 21m

$860

Great FallsEdinburgh

GTF - EDI

GTFEDI

Great Falls

Tue 10/20

6:15 am-8:25 am

2 stops19h 10m

Edinburgh Turnhouse

Fri 10/23

9:00 am-9:21 pm

2 stops43h 21m

$861

Quickest round-trip

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 8/17

1:08 pm-10:00 am

1 stop13h 52m

London Heathrow

Thu 8/20

6:30 am-5:42 pm

2 stops18h 12m

$875

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 8/17

6:28 pm-6:20 am

2 stops28h 52m

London Heathrow

Thu 8/20

6:30 am-5:42 pm

2 stops18h 12m

$880

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 8/17

5:40 am-10:00 am

1 stop21h 20m

London Heathrow

Thu 8/20

10:55 am-10:48 pm

1 stop18h 53m

$904

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 9/13

6:20 pm-10:00 am

1 stop32h 40m

London Heathrow

Sat 9/19

6:30 am-10:44 pm

2 stops23h 14m

$928

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 9/13

6:20 pm-7:25 pm

2 stops18h 05m

London Heathrow

Sat 9/19

6:30 am-10:44 pm

2 stops23h 14m

$937

Great FallsEdinburgh

GTF - EDI

GTFEDI

Great Falls

Mon 6/15

6:25 pm-11:10 pm

2 stops21h 45m

Edinburgh Turnhouse

Sun 6/21

2:05 pm-5:44 pm

2 stops34h 39m

$1,517

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Great Falls to United Kingdom

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

Airlines

Can stopping save me money on Great Falls to United Kingdom flights?

You could potentially save up to 7% on your flight if you consider stops on a Great Falls to United Kingdom flight.

Cheap Great Falls to United Kingdom flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Great Falls to United Kingdom

Fastest flight time	12h 55m
Direct flights	None

The fastest flight from Great Falls to United Kingdom takes 12h 55m

There are no direct flights from Great Falls to United Kingdom. There are no popular flight routes from Great Falls to United Kingdom.

Search flight deals

Frequently asked questions about flying from Great Falls to the United Kingdom

When did momondo last update prices for flights from Great Falls Airport to United Kingdom?
Prices for flights from Great Falls Airport to United Kingdom were last updated today.
How many operators does momondo search for flights from Great Falls Airport to United Kingdom?
There is 1 operator available for flights from Great Falls Airport to United Kingdom as of May 2026.
How old do you have to be to fly from Great Falls Airport to United Kingdom?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Great Falls Airport to United Kingdom.
What documentation or ID do you need to fly to United Kingdom?
The necessary travel and health documents for your United Kingdom trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Great Falls to United Kingdom

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

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $645	Free Cancellation	Rating 7.4 9,751 reviews		Search United Airlines flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to United Kingdom from Great Falls.

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

Flights from Great Falls to United Kingdom with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

Once all potential Great Falls to United Kingdom 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 United Kingdom right now. Can momondo alert me if prices change?

Price alerts on flights to United Kingdom 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.