Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Great Falls to the United Kingdom from $639

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 the United Kingdom departing on 1/8. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Great Falls to the United Kingdom

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:10 am - 9:40 am
GTF
-
LHR
20h 30m1 stop
United Airlines Logo
11:10 am - 9:53 pm
LHR
-
GTF
41h 43m2 stops
$639United Airlines
jue., ene. 8 - lun., ene. 12
United Airlines Logo
2:29 pm - 8:30 am
GTF
-
LHR
35h 01m2 stops
United Airlines Logo
1:00 pm - 9:53 pm
LHR
-
GTF
39h 53m2 stops
$646United Airlines
jue., ene. 8 - lun., ene. 12
United Airlines Logo
6:10 am - 9:40 am
GTF
-
LHR
20h 30m1 stop
United Airlines Logo
11:35 am - 9:53 pm
LHR
-
GTF
17h 18m1 stop
$656United Airlines
jue., ene. 8 - lun., ene. 12
United Airlines Logo
2:29 pm - 7:10 am
GTF
-
LHR
33h 41m2 stops
United Airlines Logo
11:35 am - 1:48 pm
LHR
-
GTF
33h 13m1 stop
$659United Airlines
jue., ene. 8 - lun., ene. 12
United Airlines Logo
2:29 pm - 8:35 pm
GTF
-
LHR
23h 06m2 stops
United Airlines Logo
10:25 am - 9:53 pm
LHR
-
GTF
18h 28m2 stops
$660United Airlines
jue., ene. 8 - lun., ene. 12
United Airlines Logo
6:15 am - 9:40 am
GTF
-
LHR
20h 25m1 stop
United Airlines Logo
7:25 am - 9:17 pm
LHR
-
GTF
20h 52m2 stops
$767United Airlines
mié., abr. 22 - lun., abr. 27
United Airlines Logo
6:15 am - 6:30 am
GTF
-
LHR
17h 15m2 stops
United Airlines Logo
7:25 am - 9:17 pm
LHR
-
GTF
20h 52m2 stops
$770United Airlines
mié., abr. 22 - lun., abr. 27
United Airlines Logo
2:30 pm - 9:40 am
GTF
-
LHR
12h 10m1 stop
United Airlines Logo
11:25 am - 9:17 pm
LHR
-
GTF
16h 52m1 stop
$795United Airlines
mié., abr. 22 - lun., abr. 27
United Airlines Logo
6:10 am - 7:55 am
GTF
-
EDI
18h 45m2 stops
United Airlines Logo
9:25 am - 9:53 pm
EDI
-
GTF
19h 28m2 stops
$819United Airlines
jue., ene. 29 - lun., feb. 2
United Airlines Logo
6:15 am - 7:55 am
GTF
-
LHR
18h 40m2 stops
United Airlines Logo
10:00 am - 9:53 pm
LHR
-
GTF
18h 53m2 stops
$1,063United Airlines
lun., ene. 5 - lun., ene. 12

United Airlines flights from Great Falls to United Kingdom

Our best United Airlines deals on Great Falls to United Kingdom flight tickets
United Airlines
Jan 8
GTF6:10 amGreat Falls
20h 30m
1 stop
LHR9:40 amLondon Heathrow
Jan 12
LHR11:10 amLondon Heathrow
41h 43m
2 stops
GTF9:53 pmGreat Falls
$639
Find similar
United Airlines
Jan 8
GTF2:29 pmGreat Falls
35h 01m
2 stops
LHR8:30 amLondon Heathrow
Jan 12
LHR1:00 pmLondon Heathrow
39h 53m
2 stops
GTF9:53 pmGreat Falls
$646
Find similar
United Airlines
Jan 8
GTF6:10 amGreat Falls
20h 30m
1 stop
LHR9:40 amLondon Heathrow
Jan 12
LHR11:35 amLondon Heathrow
17h 18m
1 stop
GTF9:53 pmGreat Falls
$656
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 diciembre 11, 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

jue. 1/8

6:10 am-9:40 am

1 stop20h 30m

London Heathrow

lun. 1/12

11:10 am-9:53 pm

2 stops41h 43m

$639

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

jue. 1/8

2:29 pm-8:30 am

2 stops35h 01m

London Heathrow

lun. 1/12

1:00 pm-9:53 pm

2 stops39h 53m

$646

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

jue. 1/8

6:10 am-9:40 am

1 stop20h 30m

London Heathrow

lun. 1/12

11:35 am-9:53 pm

1 stop17h 18m

$656

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

jue. 1/8

2:29 pm-7:10 am

2 stops33h 41m

London Heathrow

lun. 1/12

11:35 am-1:48 pm

1 stop33h 13m

$659

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

jue. 1/8

2:29 pm-8:35 pm

2 stops23h 06m

London Heathrow

lun. 1/12

10:25 am-9:53 pm

2 stops18h 28m

$660

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

mié. 4/22

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

lun. 4/27

7:25 am-9:17 pm

2 stops20h 52m

$767

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

mié. 4/22

6:15 am-6:30 am

2 stops17h 15m

London Heathrow

lun. 4/27

7:25 am-9:17 pm

2 stops20h 52m

$770

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

mié. 4/22

2:30 pm-9:40 am

1 stop12h 10m

London Heathrow

lun. 4/27

11:25 am-9:17 pm

1 stop16h 52m

$795

Great FallsEdinburgh

GTF - EDI

GTFEDI

Great Falls

jue. 1/29

6:10 am-7:55 am

2 stops18h 45m

Edinburgh Turnhouse

lun. 2/2

9:25 am-9:53 pm

2 stops19h 28m

$819

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

lun. 1/5

6:15 am-7:55 am

2 stops18h 40m

London Heathrow

lun. 1/12

10:00 am-9:53 pm

2 stops18h 53m

$1,063

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Fastest flight time

13h 50m

Direct flights

None
The fastest flight from Great Falls to United Kingdom takes 13h 50m
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
9,095 reviews
Search United Airlines flights
DeltaPriceFrom $764Free CancellationRating
7.9
8,007 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

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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
sáb. 1/10
sáb. 1/17
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United Kingdom

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to Londonfrom $330
Flights to Manchesterfrom $362
Flights to Edinburghfrom $386
Flights to Birminghamfrom $386
Flights to Glasgowfrom $388
Flights to Newcastle upon Tynefrom $440
Flights to Belfastfrom $487
Flights to Bristolfrom $452
Flights to Invernessfrom $416
Flights to Liverpoolfrom $435
Flights to Aberdeenfrom $521
Flights to Leedsfrom $447