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Heathrow

$357+ Cheap flights from Great Falls (GTF) to Heathrow (LHR)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/31. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — LHR
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheap flight deals from Great Falls to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Great Falls (GTF) to Heathrow (LHR). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 29, 2025.

Round-trip from

$584
(Delta)

One-way from

$357
(United Airlines)
From Great Falls to London Heathrow
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One-way flight from Great Falls to London Heathrow
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Find flight deals from Great Falls to Heathrow

Cheapest flights from Great Falls to Heathrow
Explore the most affordable flight options available from Great Falls to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/291:05 pmGTF - LHR
2 stops17h 25mDelta
Wed 10/86:15 amLHR - GTF
2 stops18h 14mDelta
Deal found 7/28$584
This KLM deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/291:05 pmGTF - LHR
1 stop13h 45mKLM
Wed 10/811:00 amLHR - GTF
1 stop18h 51mKLM
Deal found 7/27$587
This United Airlines deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/302:31 pmGTF - LHR
2 stops32h 59mUnited Airlines
Wed 10/87:25 amLHR - GTF
2 stops20h 46mUnited Airlines
Deal found 7/29$631
This American Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:21 pmGTF - LHR
1 stop33h 59mMultiple Airlines
Sat 1/39:25 amLHR - GTF
1 stop16h 16mMultiple Airlines
Deal found 7/28$1,713

Cheapflights Fare Finder

 
Customize your flight search to find flights from Great Falls to Heathrow 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, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
Use the filters below to find and compare flights from Great Falls to London Heathrow Airport that are best for you.

Fly from

Great Falls

Fly to

Heathrow

Route

Depart

Return

Price

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/29

1:05 pm-1:30 pm

2 stops17h 25m

London Heathrow

Wed 10/8

6:15 am-5:29 pm

2 stops18h 14m

$584

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/29

1:05 pm-9:50 am

1 stop13h 45m

London Heathrow

Wed 10/8

11:00 am-10:51 pm

1 stop18h 51m

$587

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 9/30

2:31 pm-6:30 am

2 stops32h 59m

London Heathrow

Wed 10/8

7:25 am-9:11 pm

2 stops20h 46m

$631

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 12/27

7:21 pm-12:20 pm

1 stop33h 59m

London Heathrow

Sat 1/3

9:25 am-6:41 pm

1 stop16h 16m

$1,713

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 10/31

2:30 pm-10:15 am

2 stops61h 45m

$357

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 10/31

1:10 pm-10:00 am

1 stop14h 50m

$383

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 10/31

6:50 pm-9:35 pm

3 stops44h 45m

$485

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from Great Falls to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Great Falls with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated July 29, 2025.
Read through reviews of airlines operating flights from Great Falls to London Heathrow Airport, such as Delta, KLM, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,979 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,979 reviews

Overall

8.0

Food

7.3

Crew

8.5

Boarding

8.2

Entertainment

7.9

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Great Falls to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Great Falls to London Heathrow?

    For a flight from Great Falls to London Heathrow, you will be flying from Great Falls. Great Falls (GTF) is just 3.5 mi from the center of the city. Great Falls is the only Great Falls airport and it handles 0 outbound flights to London Heathrow per day. 1 airline has flights to London Heathrow from Great Falls on a regular basis.

  • What are the cheapest airlines flying from Great Falls to London Heathrow Airport round-trip?

    Currently priced at $584, Delta will fly you from Great Falls to London Heathrow Airport and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from KLM and United Airlines - these airlines can fly you to your destination from $587 and $631, respectively.

  • Can I find deals for flights from Great Falls to Heathrow that include hotel bookings?

    Yes. In addition to deals on Great Falls to Heathrow flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Great Falls to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Great Falls to Heathrow.

  • Can I find deals for business class flights from Great Falls to Heathrow?

    Yes. Cheapflights offers flight deals from Great Falls to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Great Falls to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Great Falls to London Heathrow Airport (average of $661). Flying from Great Falls to London Heathrow Airport in June is currently the most expensive (average of $1,097). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
Harrow
Canterbury
Dover
Stratford-upon-Avon
Orpington
Watford
Northampton
Gatwick
Borehamwood
Dartford
Broadway
Aylesbury
Chelmsford
Folkestone
Southend-on-Sea
Chichester
Swindon

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Great Falls to Heathrow

Discover the top airline that operate flights from Great Falls to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$645Average$941FlexibilityNo cancel feeOn-time69%

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