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Cheap flights from Great Falls to the United Kingdom from $486

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 the United Kingdom departing on 10/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
KLM Logo
1:08 pm - 10:00 amGTF-LHR
14h 52m1 stop
KLM Logo
8:25 pm - 5:29 pmLHR-GTF
28h 04m2 stops
$643KLM
Find Deal
Wed, Oct 29 - Sun, Nov 2
KLM Logo
1:08 pm - 10:30 amGTF-LHR
15h 22m2 stops
KLM Logo
5:50 pm - 5:29 pmLHR-GTF
30h 39m2 stops
$648KLM
Find Deal
Wed, Oct 29 - Sun, Nov 2
KLM Logo
1:08 pm - 10:00 amGTF-LHR
14h 52m1 stop
KLM Logo
10:45 am - 5:29 pmLHR-GTF
13h 44m1 stop
$650KLM
Find Deal
Wed, Oct 29 - Sun, Nov 2
United Airlines Logo
2:30 pm - 11:15 amGTF-LHR
14h 45m2 stops
United Airlines Logo
4:20 pm - 1:33 pmLHR-GTF
28h 13m3 stops
$704United Airlines
Find Deal
Wed, Oct 29 - Sun, Nov 2
United Airlines Logo
2:30 pm - 9:40 amGTF-LHR
13h 10m1 stop
United Airlines Logo
6:35 am - 9:33 pmLHR-GTF
20h 58m2 stops
$727United Airlines
Find Deal
Mon, Mar 16 - Thu, Mar 26
Multiple Airlines Logo
4:00 pm - 12:20 pmGTF-LHR
14h 20m1 stop
Multiple Airlines Logo
2:55 pm - 3:20 pmLHR-GTF
30h 25m1 stop
$757Multiple Airlines
Find Deal
Mon, Mar 16 - Thu, Mar 26
United Airlines Logo
6:15 am - 7:55 amGTF-LHR
19h 40m2 stops
United Airlines Logo
7:40 am - 9:33 pmLHR-GTF
19h 53m2 stops
$761United Airlines
Find Deal
Mon, Mar 16 - Thu, Mar 26
Delta Logo
1:10 pm - 10:00 amGTF-LHR
14h 50m1 stop
Delta Logo
10:55 am - 10:53 pmLHR-GTF
18h 58m1 stop
$1,097Delta
Find Deal
Fri, Mar 27 - Tue, Mar 31
Delta Logo
1:10 pm - 10:00 amGTF-LHR
14h 50m1 stop
Delta Logo
10:55 am - 5:44 pmLHR-GTF
13h 49m1 stop
$1,145Delta
Find Deal
Fri, Mar 27 - Tue, Mar 31
Multiple Airlines Logo
10:20 am - 12:40 pmGTF-LHR
44h 20m3 stops
Multiple Airlines Logo
6:00 am - 9:30 amLHR-GTF
33h 30m3 stops
$1,300Multiple Airlines
Find Deal
Mon, Mar 16 - Thu, Mar 26

KLM flights from Great Falls to United Kingdom

Our best KLM deals on Great Falls to United Kingdom flight tickets
KLM
Oct 29
GTF1:08 pmGreat Falls
14h 52m
1 stop
LHR10:00 amLondon Heathrow
Nov 2
LHR8:25 pmLondon Heathrow
28h 04m
2 stops
GTF5:29 pmGreat Falls
$643
Find similar
KLM
Oct 29
GTF1:08 pmGreat Falls
15h 22m
2 stops
LHR10:30 amLondon Heathrow
Nov 2
LHR5:50 pmLondon Heathrow
30h 39m
2 stops
GTF5:29 pmGreat Falls
$648
Find similar
KLM
Oct 29
GTF1:08 pmGreat Falls
14h 52m
1 stop
LHR10:00 amLondon Heathrow
Nov 2
LHR10:45 amLondon Heathrow
13h 44m
1 stop
GTF5:29 pmGreat Falls
$650
Find similar

United Airlines flights from Great Falls to United Kingdom

Our best United Airlines deals on Great Falls to United Kingdom flight tickets
United Airlines
Oct 29
GTF2:30 pmGreat Falls
14h 45m
2 stops
LHR11:15 amLondon Heathrow
Nov 2
LHR4:20 pmLondon Heathrow
28h 13m
3 stops
GTF1:33 pmGreat Falls
$704
Find similar
United Airlines
Mar 16
GTF2:30 pmGreat Falls
13h 10m
1 stop
LHR9:40 amLondon Heathrow
Mar 26
LHR6:35 amLondon Heathrow
20h 58m
2 stops
GTF9:33 pmGreat Falls
$727
Find similar
United Airlines
Mar 16
GTF6:15 amGreat Falls
19h 40m
2 stops
LHR7:55 amLondon Heathrow
Mar 26
LHR7:40 amLondon Heathrow
19h 53m
2 stops
GTF9:33 pmGreat Falls
$761
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Great Falls to United Kingdom 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 832,500 searches. Data last updated October 14, 2025.
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

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 10/29

1:08 pm-10:00 am

1 stop14h 52m

London Heathrow

Sun 11/2

8:25 pm-5:29 pm

2 stops28h 04m

$643

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 10/29

1:08 pm-10:30 am

2 stops15h 22m

London Heathrow

Sun 11/2

5:50 pm-5:29 pm

2 stops30h 39m

$648

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 10/29

1:08 pm-10:00 am

1 stop14h 52m

London Heathrow

Sun 11/2

10:45 am-5:29 pm

1 stop13h 44m

$650

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 10/29

2:30 pm-11:15 am

2 stops14h 45m

London Heathrow

Sun 11/2

4:20 pm-1:33 pm

3 stops28h 13m

$704

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 3/16

2:30 pm-9:40 am

1 stop13h 10m

London Heathrow

Thu 3/26

6:35 am-9:33 pm

2 stops20h 58m

$727

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 3/16

4:00 pm-12:20 pm

1 stop14h 20m

London Heathrow

Thu 3/26

2:55 pm-3:20 pm

1 stop30h 25m

$757

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 3/16

6:15 am-7:55 am

2 stops19h 40m

London Heathrow

Thu 3/26

7:40 am-9:33 pm

2 stops19h 53m

$761

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 3/27

1:10 pm-10:00 am

1 stop14h 50m

London Heathrow

Tue 3/31

10:55 am-10:53 pm

1 stop18h 58m

$1,097

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 3/27

1:10 pm-10:00 am

1 stop14h 50m

London Heathrow

Tue 3/31

10:55 am-5:44 pm

1 stop13h 49m

$1,145

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 3/16

10:20 am-12:40 pm

3 stops44h 20m

London Heathrow

Thu 3/26

6:00 am-9:30 am

3 stops33h 30m

$1,300

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first
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See travel insights to the United Kingdom from

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

What is the cheapest day to depart on your flight to United Kingdom?

The cheapest day to depart from Great Falls to United Kingdom is on a Wednesday when prices can be found for as low as $672. The most expensive day to fly to United Kingdom is Tuesday, with ticket prices averaging around $1,371.

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

According to our data, the cheapest time of day to fly to United Kingdom is at noon. momondo users have found flights departing from Great Falls to United Kingdom at noon for as low as $778. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights to United Kingdom 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.

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

Direct flights

None
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

  • 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?

  • 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 AirlinesPriceFrom $645Free CancellationRating
7.4
8,974 reviews
Search United Airlines flights
DeltaPriceFrom $764Free CancellationRating
7.9
7,973 reviews
Search Delta 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.

An easier way to manage your United Kingdom trip

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Find better results for your trip to the United Kingdom

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