Latest deals
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Great Falls to London from $616

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 3/1. 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 London

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:20 pm - 8:05 am
GTF
-
LHR
30h 45m
2 stops
Delta Logo
6:20 am - 4:42 pm
LHR
-
GTF
17h 22m
2 stops
$616Delta
dom., mar. 1 - dom., mar. 8
Scandinavian Airlines Logo
1:12 pm - 10:00 am
GTF
-
LHR
13h 48m
1 stop
Scandinavian Airlines Logo
10:45 am - 12:30 pm
LHR
-
GTF
32h 45m
1 stop
$634Scandinavian Airlines
mié., feb. 11 - dom., feb. 22
Scandinavian Airlines Logo
5:25 am - 8:05 am
GTF
-
LHR
19h 40m
2 stops
Scandinavian Airlines Logo
4:50 pm - 12:30 pm
LHR
-
GTF
26h 40m
2 stops
$638Scandinavian Airlines
mié., feb. 11 - dom., feb. 22
Multiple Airlines Logo
5:59 pm - 6:50 am
GTF
-
LHR
29h 51m
2 stops
Multiple Airlines Logo
4:30 pm - 4:17 pm
LHR
-
GTF
30h 47m
2 stops
$663Multiple Airlines
mié., feb. 11 - dom., feb. 22
United Airlines Logo
6:10 am - 9:40 am
GTF
-
LHR
20h 30m
1 stop
United Airlines Logo
11:35 am - 9:33 pm
LHR
-
GTF
16h 58m
1 stop
$709United Airlines
mié., feb. 11 - dom., feb. 22
United Airlines Logo
6:10 am - 9:40 am
GTF
-
LHR
20h 30m
1 stop
United Airlines Logo
10:30 am - 9:33 pm
LHR
-
GTF
42h 03m
2 stops
$711United Airlines
mié., feb. 11 - dom., feb. 22
United Airlines Logo
2:30 pm - 12:20 pm
GTF
-
LHR
14h 50m
1 stop
United Airlines Logo
2:50 pm - 9:17 pm
LHR
-
GTF
13h 27m
1 stop
$725United Airlines
mié., abr. 1 - sáb., abr. 11
United Airlines Logo
6:15 am - 11:35 am
GTF
-
LHR
22h 20m
2 stops
United Airlines Logo
2:50 pm - 9:17 pm
LHR
-
GTF
13h 27m
1 stop
$729United Airlines
mié., abr. 1 - sáb., abr. 11
United Airlines Logo
2:25 pm - 9:40 am
GTF
-
LHR
12h 15m
1 stop
United Airlines Logo
6:30 am - 9:11 pm
LHR
-
GTF
21h 41m
2 stops
$741United Airlines
vie., feb. 27 - vie., mar. 6
United Airlines Logo
2:25 pm - 9:40 am
GTF
-
LHR
12h 15m
1 stop
United Airlines Logo
11:35 am - 9:11 pm
LHR
-
GTF
16h 36m
1 stop
$758United Airlines
vie., feb. 27 - vie., mar. 6

United Airlines flights from Great Falls to London Heathrow Airport

Our best United Airlines deals on Great Falls to London Heathrow Airport flight tickets
United Airlines
Feb 11
GTF6:10 amGreat Falls
20h 30m
1 stop
LHR9:40 amLondon Heathrow
Feb 22
LHR11:35 amLondon Heathrow
16h 58m
1 stop
GTF9:33 pmGreat Falls
$709
United Airlines
Feb 11
GTF6:10 amGreat Falls
20h 30m
1 stop
LHR9:40 amLondon Heathrow
Feb 22
LHR10:30 amLondon Heathrow
42h 03m
2 stops
GTF9:33 pmGreat Falls
$711
United Airlines
Feb 27
GTF2:25 pmGreat Falls
12h 15m
1 stop
LHR9:40 amLondon Heathrow
Mar 6
LHR6:30 amLondon Heathrow
21h 41m
2 stops
GTF9:11 pmGreat Falls
$741

Scandinavian Airlines flights from Great Falls to London Heathrow Airport

Our best Scandinavian Airlines deals on Great Falls to London Heathrow Airport flight tickets
Scandinavian Airlines
Feb 11
GTF1:12 pmGreat Falls
13h 48m
1 stop
LHR10:00 amLondon Heathrow
Feb 22
LHR10:45 amLondon Heathrow
32h 45m
1 stop
GTF12:30 pmGreat Falls
$634
Scandinavian Airlines
Feb 11
GTF5:25 amGreat Falls
19h 40m
2 stops
LHR8:05 amLondon Heathrow
Feb 22
LHR4:50 pmLondon Heathrow
26h 40m
2 stops
GTF12:30 pmGreat Falls
$638

momondo Fare Finder

 
Customize your flight search to find flights from Great Falls to London Heathrow Airport 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 enero 15, 2026.
Use the filters below to find and compare flights from Great Falls to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

dom. 3/1

6:20 pm-8:05 am

2 stops30h 45m

London Heathrow

dom. 3/8

6:20 am-4:42 pm

2 stops17h 22m

$616

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

mié. 2/11

1:12 pm-10:00 am

1 stop13h 48m

London Heathrow

dom. 2/22

10:45 am-12:30 pm

1 stop32h 45m

$634

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

mié. 2/11

5:25 am-8:05 am

2 stops19h 40m

London Heathrow

dom. 2/22

4:50 pm-12:30 pm

2 stops26h 40m

$638

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

mié. 2/11

5:59 pm-6:50 am

2 stops29h 51m

London Heathrow

dom. 2/22

4:30 pm-4:17 pm

2 stops30h 47m

$663

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

mié. 2/11

6:10 am-9:40 am

1 stop20h 30m

London Heathrow

dom. 2/22

11:35 am-9:33 pm

1 stop16h 58m

$709

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

mié. 2/11

6:10 am-9:40 am

1 stop20h 30m

London Heathrow

dom. 2/22

10:30 am-9:33 pm

2 stops42h 03m

$711

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

mié. 4/1

2:30 pm-12:20 pm

1 stop14h 50m

London Heathrow

sáb. 4/11

2:50 pm-9:17 pm

1 stop13h 27m

$725

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

mié. 4/1

6:15 am-11:35 am

2 stops22h 20m

London Heathrow

sáb. 4/11

2:50 pm-9:17 pm

1 stop13h 27m

$729

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

vie. 2/27

2:25 pm-9:40 am

1 stop12h 15m

London Heathrow

vie. 3/6

6:30 am-9:11 pm

2 stops21h 41m

$741

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

vie. 2/27

2:25 pm-9:40 am

1 stop12h 15m

London Heathrow

vie. 3/6

11:35 am-9:11 pm

1 stop16h 36m

$758

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

When to book flights from Great Falls to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Great Falls to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Great Falls to London Heathrow Airport (GTF to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Great Falls to London Heathrow Airport

Fastest flight time

12h 11m

Direct flights

None
The fastest flight from Great Falls to London Heathrow Airport takes 12h 11m
There are no direct flights from Great Falls to London Heathrow Airport. There are no popular flight routes from Great Falls to London Heathrow Airport.
Search flight deals

  • How far is Great Falls to London Heathrow by plane?

    There are 4468.7 mi between Great Falls and London Heathrow. A reasonable flight in good conditions will take 12h 11m.

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

    Prices for flights from Great Falls Airport to London Heathrow Airport were last updated today.

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

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

    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 Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The travel and health documents you'll need for your trip to London Heathrow Airport 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 Heathrow Airport. 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 Heathrow Airport?

Best airlines flying from Great Falls to London Heathrow Airport

Compare and see reviews for airlines that fly from Great Falls to London Heathrow Airport with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $645Free CancellationRating
7.4
9,163 reviews
Search United Airlines flights

  • How do I get Price Alerts for flights from Great Falls to London Heathrow Airport?

    Price Alerts will notify you by email when the price for flights to London Heathrow Airport from Great Falls decreases. To activate this, select your desired travel dates and search for offers. While browsing through offers you’ll see the Price Alert widget toggle. Click it to turn on notifications.

  • How can I save money on flights from Great Falls to London Heathrow Airport with momondo?

    With “Price Forecast”, learn how soon you should book your flight in advance. Down to the day of week and time of day, our information can inform you on the ideal time to book to save on your travel. Our “Price Calendar” shows you at a quick glance when to book your travel for lower rates. By setting “Price Alerts” you can monitor changes in price and target the ideal time to book. Search for your trip destination by budget amount via our “Explore” feature. Whether you’re looking for ideas for your next travel adventure or cost-cutting tips, our “Discover” content is a great place to start.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Gatwick
Hounslow
Luton
Milton Keynes
Dover
Slough
Guildford
Crawley
Dartford
Hayes
Stratford-upon-Avon
Wembley
Brentwood
Salisbury
Watford
Cobham
Folkestone
Romford
Harrow
Croydon

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Great Falls to London. momondo saves you time and could save you money on your trip.

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

Yes. All flights to London from Great Falls on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight 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?

Yes. momondo can track prices for Great Falls to London flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your London Heathrow Airport 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. 2/14
sáb. 2/21
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to London

Popular cities in the United Kingdom

Popular flights according to clicks in the last 7 days on momondo
Flights to London Gatwick Airportfrom $356
Flights to London City Airportfrom $441
Flights to London Stansted Airportfrom $371
Flights to London Luton Airportfrom $373
Flights to Glasgow Intl Airportfrom $391
Flights to London Southend Airportfrom $485
Flights to Belfast Intl Airportfrom $502
Flights to Belfast City Airportfrom $494