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?

The number of operators available for flights from Great Falls Airport to London Heathrow Airport is 1 as of August 2025.

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.

$668 Cheap Flights from Great Falls to London Heathrow Airport (GTF-LHR) in 2025

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Find the cheapest flights from Great Falls to London (GTF-LHR)

Round-trip

One-way

Cheap round-trip flights

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

2:31 pm - 6:30 amGTF-LHR

32h 59m2 stops

7:25 am - 9:11 pmLHR-GTF

20h 46m2 stops

$732United 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

6:20 am - 7:30 amGTF-LHR

18h 10m2 stops

11:10 am - 1:33 pmLHR-GTF

33h 23m2 stops

$735United Airlines

Find Deal

Tue, Nov 11 - Wed, Nov 26

2:30 pm - 9:20 pmGTF-LHR

23h 50m2 stops

7:30 am - 1:33 pmLHR-GTF

37h 03m2 stops

$739United Airlines

Find Deal

Tue, Nov 11 - Thu, Nov 27

4:29 pm - 1:40 pmGTF-LHR

14h 11m1 stop

9:50 am - 5:35 pmLHR-GTF

14h 45m1 stop

$747

Find Deal

Mon, Sep 29 - Wed, Oct 8

5:40 am - 11:25 amGTF-LHR

22h 45m2 stops

6:15 am - 5:29 pmLHR-GTF

18h 14m2 stops

$753Delta

Find Deal

Mon, Sep 29 - Wed, Oct 8

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

6:20 pm - 8:10 pmGTF-LHR

18h 50m2 stops

10:45 am - 5:42 pmLHR-GTF

13h 57m1 stop

$811Delta

Find Deal

Thu, Nov 13 - Thu, Nov 27

1:10 pm - 4:05 pmGTF-LHR

19h 55m2 stops

5:50 pm - 5:42 pmLHR-GTF

30h 52m2 stops

$1,347KLM

Find Deal

Thu, Nov 13 - Sat, Nov 29

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

Sep 29

GTF7:00 amGreat Falls

22h 20m

1 stop

LHR12:20 pmLondon Heathrow

Oct 8

LHR8:30 amLondon Heathrow

43h 41m

2 stops

GTF9:11 pmGreat Falls

$730

Find similar

United Airlines

Sep 29

GTF2:31 pmGreat Falls

32h 59m

2 stops

LHR6:30 amLondon Heathrow

Oct 8

LHR7:25 amLondon Heathrow

20h 46m

2 stops

GTF9:11 pmGreat Falls

$732

Find similar

United Airlines

Nov 11

GTF2:30 pmGreat Falls

12h 10m

1 stop

LHR9:40 amLondon Heathrow

Nov 25

LHR7:30 amLondon Heathrow

22h 09m

2 stops

GTF10:39 pmGreat Falls

$734

Find similar

Delta flights from Great Falls to London Heathrow Airport

Our best Delta deals on Great Falls to London Heathrow Airport flight tickets

Delta

Sep 29

GTF5:40 amGreat Falls

22h 45m

2 stops

LHR11:25 amLondon Heathrow

Oct 8

LHR6:15 amLondon Heathrow

18h 14m

2 stops

GTF5:29 pmGreat Falls

$753

Find similar

Delta

Nov 13

GTF6:20 pmGreat Falls

18h 50m

2 stops

LHR8:10 pmLondon Heathrow

Nov 27

LHR10:45 amLondon Heathrow

13h 57m

1 stop

GTF5:42 pmGreat Falls

$811

Find similar

Delta

Nov 13

GTF5:30 amGreat Falls

18h 35m

2 stops

LHR7:05 amLondon Heathrow

Nov 27

LHR6:20 amLondon Heathrow

18h 22m

2 stops

GTF5:42 pmGreat Falls

$886

Find similar

momondo Fare Finder

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

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

Mon 9/29

2:31 pm-6:30 am

2 stops32h 59m

London Heathrow

Wed 10/8

7:25 am-9:11 pm

2 stops20h 46m

$732

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

Tue 11/11

6:20 am-7:30 am

2 stops18h 10m

London Heathrow

Wed 11/26

11:10 am-1:33 pm

2 stops33h 23m

$735

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 11/11

2:30 pm-9:20 pm

2 stops23h 50m

London Heathrow

Thu 11/27

7:30 am-1:33 pm

2 stops37h 03m

$739

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/29

4:29 pm-1:40 pm

1 stop14h 11m

London Heathrow

Wed 10/8

9:50 am-5:35 pm

1 stop14h 45m

$747

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/29

5:40 am-11:25 am

2 stops22h 45m

London Heathrow

Wed 10/8

6:15 am-5:29 pm

2 stops18h 14m

$753

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

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 11/13

6:20 pm-8:10 pm

2 stops18h 50m

London Heathrow

Thu 11/27

10:45 am-5:42 pm

1 stop13h 57m

$811

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 11/13

1:10 pm-4:05 pm

2 stops19h 55m

London Heathrow

Sat 11/29

5:50 pm-5:42 pm

2 stops30h 52m

$1,347

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 Heathrow Airport

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 Heathrow Airport?

Our data shows that Friday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $710. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,498.

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

According to our data, the cheapest time of day to fly to London Heathrow Airport is at noon. momondo users have found flights departing from Great Falls to London Heathrow Airport at noon for as low as $813. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the morning are often more expensive with an average ticket price of $964.

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

Best Price Found	$730
Fastest flight time	12h 10m
Direct flights	None

The best flight deal from Great Falls to London Heathrow Airport found on momondo in the last 72 hours is $730

The fastest flight from Great Falls to London Heathrow Airport takes 12h 10m

There are no direct flights from Great Falls to London Heathrow Airport. Popular non-direct route for this connection is Great Falls Airport - 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 10m.
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?
The number of operators available for flights from Great Falls Airport to London Heathrow Airport is 1 as of August 2025.
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?
Based on momondo bookings for flights between Great Falls and London Heathrow Airport, the leading airline is United Airlines, making up 100% of the total bookings.

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 Airlines	PriceFrom $645	Free Cancellation	Rating 7.4 8,925 reviews		Search United Airlines flights

Hounslow

Gatwick

Dover

Slough

Luton

Guildford

Milton Keynes

Dartford

Crawley

Hayes

Chelmsford

Stansted

Salisbury

Brentwood

Ilford

Swindon

Colchester

Folkestone

Stratford-upon-Avon

Watford

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.

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Cheap flights from Great Falls to London from $730

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 (GTF-LHR)

Cheap round-trip flights

Cheap one-way flights

United Airlines flights from Great Falls to London Heathrow Airport

Our best United Airlines deals on Great Falls to London Heathrow Airport flight tickets

Delta flights from Great Falls to London Heathrow Airport

Our best Delta deals on Great Falls to London Heathrow Airport flight tickets

momondo Fare Finder

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

See travel insights to London from

How to get the cheapest flight ticket from Great Falls to London Heathrow Airport

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 Heathrow Airport?

Our data shows that Friday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $710. The most expensive day to fly to London Heathrow Airport is Saturday, with ticket prices averaging around $1,498.

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

When to book flights from Great Falls to London Heathrow Airport

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

Best Price Found

Fastest flight time

Direct flights

How far is Great Falls to London Heathrow by plane?

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

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?

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

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

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 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.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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