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$692+ Cheap flights from Great Falls (GTF) to London (LON)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — LON
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
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Cheap flight deals from Great Falls to London

Discover tips and strategies to find the most affordable flight options for your journey from Great Falls (GTF) to London (LON). 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 1, 2025.

Round-trip from

$692
(United Airlines)
From Great Falls to London (LON)
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Cheapest flights from Great Falls to London
Explore the most affordable flight options available from Great Falls to London. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 1, 2025.

This United Airlines deal was found by Cheapflights users on 6/30. 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.
Wed 8/136:25 amGTF - LHR
1 stop20h 15mUnited Airlines
Wed 8/272:05 pmLHR - GTF
2 stops30h 32mUnited Airlines
Deal found 6/30$692
This Delta deal was found by Cheapflights users on 6/30. 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.
Tue 8/126:05 amGTF - LHR
2 stops22h 20mDelta
Fri 8/296:15 amLHR - GTF
2 stops18h 11mDelta
Deal found 6/30$710
This KLM deal was found by Cheapflights users on 6/30. 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.
Sat 8/1611:43 amGTF - LHR
2 stops18h 27mKLM
Wed 8/2711:00 amLHR - GTF
1 stop13h 26mKLM
Deal found 6/30$769
This Air France deal was found by Cheapflights users on 6/30. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1511:43 amGTF - LHR
1 stop15h 07mMultiple Airlines
Tue 8/266:30 amLHR - GTF
2 stops17h 56mMultiple Airlines
Deal found 6/30$770

Cheapflights Fare Finder

Customize your flight search to find flights from Great Falls to London 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 1, 2025.
Use the filters below to find and compare flights from Great Falls to London that are best for you.

Fly from

Great Falls

Fly to

London

Route

Depart

Return

Price

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 8/13

6:25 am-9:40 am

1 stop20h 15m

London Heathrow

Wed 8/27

2:05 pm-1:37 pm

2 stops30h 32m

$692

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 8/12

6:05 am-11:25 am

2 stops22h 20m

London Heathrow

Fri 8/29

6:15 am-5:26 pm

2 stops18h 11m

$710

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 8/16

11:43 am-1:10 pm

2 stops18h 27m

London Heathrow

Wed 8/27

11:00 am-5:26 pm

1 stop13h 26m

$769

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 8/15

11:43 am-9:50 am

1 stop15h 07m

London Heathrow

Tue 8/26

6:30 am-5:26 pm

2 stops17h 56m

$770

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Best time to book a flight from Great Falls to London

Have a flexible travel schedule? Discover the best time to fly to London 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
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated July 1, 2025.
Get a feel of what it's like to fly with Delta, KLM, and United Airlines from Great Falls to London by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

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
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

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
1,366 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

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
8,858 reviews
Delta
8.0
Very good
7,973 reviews

Crew

8.5

Entertainment

7.9

Boarding

8.2

Food

7.3

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 London. 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?

    Great Falls (GTF), located 3.5 mi from the city center, is the airport you fly out of when you book flights from Great Falls to London. 1 airline have flights from Great Falls to London on a regular basis. Booking flights from Great Falls to London should not be difficult; the airport handles an average of 0 outbound flights to London per day.

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

    Flying on United Airlines is currently your cheapest option to London, with prices starting at $692. Additional round-trip tickets that might be worth considering are offered by Delta and KLM, with the lowest prices starting at $710 and $769, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Great Falls to London 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?

    Currently, November is the cheapest month in which you can book a flight from Great Falls to London (average of $661). Flying from Great Falls to London in June is currently the most expensive (average of $1,098). 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
Hounslow
Hayes
Thornton Heath
Canterbury
Harrow
Dover
Gatwick
Orpington
Watford
Croydon
Folkestone
Borehamwood
Aylesbury
Chelmsford
Brentwood
Chichester
Arundel
Milton Keynes
Bishop's Stortford
Dartford

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Great Falls to London

Discover the top airline that operate flights from Great Falls to London. 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 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$669Average$950FlexibilityNo cancel feeOn-time69%

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