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$622+ 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 1/18. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — LON
Jan 3 — Jan 101
Sat 1/3
Sat 1/10
1 adult, Economy
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Cheap flight deals from Great Falls to London

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 December 4, 2025.

This United Airlines deal was found by Cheapflights users on 12/2. 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.
Fri 12/52:35 pmGTF - LHR
1 stop12h 05mUnited Airlines
Tue 12/96:35 amLHR - GTF
2 stops38h 04mUnited Airlines
Deal found 12/2$968

Find 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 December 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$622
(Air France)
Provider with most accurate pricing for Great Falls-London (LON) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Great Falls-London (LON) flights.
Search Deals
From Great Falls to London (LON)
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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 December 4, 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

Sun 1/18

5:30 am-7:50 am

2 stops19h 20m

London Heathrow

Sun 1/25

5:05 pm-5:30 pm

2 stops31h 25m

$622

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 1/16

1:15 pm-10:00 am

1 stop13h 45m

London Heathrow

Fri 1/23

6:20 am-5:30 pm

2 stops18h 10m

$623

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 1/16

1:15 pm-8:10 pm

2 stops23h 55m

London Heathrow

Fri 1/23

6:20 am-5:30 pm

2 stops18h 10m

$628

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 1/18

2:29 pm-9:40 am

1 stop12h 11m

London Heathrow

Sun 1/25

6:00 pm-9:53 pm

2 stops34h 53m

$638

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Fri 1/16

2:29 pm-9:40 am

1 stop12h 11m

London Heathrow

Fri 1/23

11:35 am-1:48 pm

1 stop33h 13m

$655

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 3/26

1:10 pm-10:30 am

2 stops15h 20m

London Heathrow

Sun 4/5

10:55 am-10:48 pm

1 stop18h 53m

$725

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 3/26

4:00 pm-12:20 pm

1 stop14h 20m

London Heathrow

Sun 4/5

4:30 pm-3:20 pm

1 stop29h 50m

$882

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 3/26

6:15 am-5:55 am

2 stops17h 40m

London Heathrow

Sun 4/5

8:00 am-9:17 pm

3 stops20h 17m

$3,096

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Compare providers for flights from Great Falls to London

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Great Falls to London in December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Great Falls-London flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Great Falls-London flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Great Falls-London flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Great Falls-London flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Great Falls-London flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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.

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.

  • How long is the flight from Great Falls to London?

    Departing from Great Falls to London will take you 12h 11m. The distance from Great Falls to London is about 4472 mi. This flight may include one or multiple stops.

  • What is the cheapest airline to fly from Great Falls to London round-trip?

    Flying on United Airlines is currently your cheapest option to London, with prices starting at $645.

  • 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.

See more FAQs

Traveling to a place near London?

Book flights to London if you plan to visit one of these locations
Ilford
Hounslow
Hayes
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Croydon
Orpington
Watford
Borehamwood
Aylesbury
Chipping Norton
Kingston upon Thames
Wembley
Folkestone
Eastbourne
Sutton

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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 December 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$645Average$950FlexibilityNo cancel feeOn-time69%

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