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Heathrow

$439+ 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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — LHR
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
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 June 12, 2025.

Round-trip from

$728
(United Airlines)

One-way from

$439
(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 June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/10. 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.
Mon 9/292:31 pmGTF - LHR
2 stops36h 04mUnited Airlines
Wed 10/82:05 pmLHR - GTF
2 stops38h 06mUnited Airlines
Deal found 6/10$728
This KLM deal was found by Cheapflights users on 6/9. 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.
Thu 9/411:43 amGTF - LHR
2 stops18h 47mKLM
Thu 9/2510:55 amLHR - GTF
1 stop13h 47mKLM
Deal found 6/9$856
This Delta deal was found by Cheapflights users on 6/11. 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 9/1511:30 amGTF - LHR
1 stop15h 20mDelta
Sun 9/2110:55 amLHR - GTF
2 stops18h 56mDelta
Deal found 6/11$862
This American Airlines deal was found by Cheapflights users on 6/11. 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.
Sun 9/144:29 pmGTF - LHR
1 stop14h 11mMultiple Airlines
Sat 9/209:50 amLHR - GTF
1 stop12h 59mMultiple Airlines
Deal found 6/11$961

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 June 12, 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

2:31 pm-9:35 am

2 stops36h 04m

London Heathrow

Wed 10/8

2:05 pm-9:11 pm

2 stops38h 06m

$728

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 9/4

11:43 am-1:30 pm

2 stops18h 47m

London Heathrow

Thu 9/25

10:55 am-5:42 pm

1 stop13h 47m

$856

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/15

11:30 am-9:50 am

1 stop15h 20m

London Heathrow

Sun 9/21

10:55 am-10:51 pm

2 stops18h 56m

$862

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 9/14

4:29 pm-1:40 pm

1 stop14h 11m

London Heathrow

Sat 9/20

9:50 am-3:49 pm

1 stop12h 59m

$961

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 10/5

7:00 am-12:20 pm

1 stop22h 20m

$439

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 10/5

6:15 pm-11:55 am

3 stops34h 40m

$530

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

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.

Cheapflights Insights

Everything you need to know about your flight from Great Falls to London Heathrow Airport

Rainfall in Heathrow by month

Plan your trip to Heathrow by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

Plan your trip to Heathrow by taking into account the average temperature totals by month.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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 June 12, 2025.
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
1,358 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Comfort

7.9

Overall

8.0

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. 0 airlines have 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 $728, United Airlines will fly you from Great Falls to London Heathrow Airport and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from KLM and Delta - these airlines can fly you to your destination from $856 and $862, 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 $1,108). 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 Great Falls?

Book flights to Great Falls if you plan to visit one of these locations
Hayes
Hounslow
Thornton Heath
Luton
Canterbury
Harrow
Dover
Stratford-upon-Avon
Gatwick
Orpington
Watford
Northampton
Croydon
Folkestone
Borehamwood
Broadway
Sutton
Aylesbury
Chelmsford
Brentwood

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