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Cheap flights from Great Falls to London from £369

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 23/5. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — LON
12 May — 19 May1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Great Falls to London

Enter your travel dates to find the best prices.

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 12 April 2026.

Tue 29/914:25
GTF
-
LHR
1 stop15h 00m
United Airlines
Tue 6/1011:25
LHR
-
GTF
1 stop16h 50m
United Airlines
Deal found 9/4£673
Fri 4/1214:25
GTF
-
LHR
2 stops59h 20m
United Airlines
Tue 8/1207:40
LHR
-
GTF
2 stops20h 40m
United Airlines
Deal found 10/4£682
Sun 27/918:20
GTF
-
LHR
1 stop32h 40m
Delta
Wed 7/1006:30
LHR
-
GTF
2 stops18h 13m
Delta
Deal found 8/4£687
Sun 27/918:20
GTF
-
LHR
2 stops16h 15m
Delta
Thu 8/1011:45
LHR
-
GTF
2 stops36h 58m
Delta
Deal found 8/4£690
Tue 1/906:15
GTF
-
LHR
1 stop20h 25m
United Airlines
Sun 6/909:30
LHR
-
GTF
2 stops42h 58m
United Airlines
Deal found 9/4£695
Tue 27/1014:25
GTF
-
LHR
2 stops14h 50m
United Airlines
Mon 2/1107:30
LHR
-
GTF
2 stops22h 00m
United Airlines
Deal found 9/4£700
Sun 27/918:20
GTF
-
LHR
1 stop32h 40m
Delta
Mon 5/1017:35
LHR
-
GTF
2 stops31h 08m
Delta
Deal found 8/4£702
Sun 27/914:25
GTF
-
LHR
1 stop15h 10m
United Airlines
Wed 7/1014:50
LHR
-
GTF
1 stop29h 39m
United Airlines
Deal found 8/4£709

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 12 April 2026.

Round-trip from

£673

One-way from

£369
United Airlines
  • United Airlines
  • 29/9-6/10
  • 2 total stops
  • 31h 50m total
  • Great Falls to London
Search Deals
23/5
  • 23/5
  • 3 total stops
  • 43h 28m total
  • Great Falls to London
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 12 April 2026.
Use the filters below to find and compare flights from Great Falls to London that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 29/9

14:25-09:40

1 stop12h 15m

London Heathrow

Tue 6/10

10:00-21:15

2 stops18h 15m

£676

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 1/9

06:15-09:40

1 stop20h 25m

London Heathrow

Sun 6/9

09:30-21:28

2 stops42h 58m

£695

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 5/5

14:35-20:40

2 stops23h 05m

London Heathrow

Wed 20/5

09:30-21:18

2 stops18h 48m

£757

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 28/4

14:30-09:40

1 stop12h 10m

London Heathrow

Thu 7/5

11:25-21:18

1 stop16h 53m

£817

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 26/4

14:30-12:35

1 stop15h 05m

London Heathrow

Fri 8/5

14:50-21:18

1 stop13h 28m

£817

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 29/4

13:09-10:00

1 stop13h 51m

London Heathrow

Tue 12/5

06:15-17:39

2 stops18h 24m

£819

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 27/4

05:30-10:00

1 stop21h 30m

London Heathrow

Thu 14/5

10:55-22:26

1 stop18h 31m

£835

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 26/4

13:09-15:35

2 stops19h 26m

London Heathrow

Fri 15/5

12:25-22:26

2 stops17h 01m

£838
Fastest return journey

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 28/4

14:30-12:25

1 stop14h 55m

London Heathrow

Tue 12/5

14:50-21:18

1 stop13h 28m

£852
Cheapest one-way
Fastest single journey

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 23/5

18:52-21:20

3 stops43h 28m

£369

Flights are sorted by cheapest return flights first.

Deals found on 8/4

Sorted by cheapest first

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 return 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. 0 airlines 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?

    United Airlines and Lufthansa can get you from Great Falls to London in just under 15h. Your travel time can differ by up to 20h 15m. Great Falls and London are separated by a distance of 4472 mi. This flight may include one or multiple stops.

  • 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 holiday 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

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Milton Keynes
Wembley
Croydon
Hounslow
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Watford
Kingston upon Thames
Romford
Eastbourne
Chelmsford
Ipswich
Southend-on-Sea
Guildford
Bishop's Stortford

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Why should you use Cheapflights to find cheap flight tickets from Great Falls to London?

Cheapflights simply makes it quick and affordable to book flights from Great Falls to London by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Great Falls to London with no change fees?

Yes, we can. To see specific flights from Great Falls to London with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Great Falls to London become cheaper?

Yes! Start tracking prices for Great Falls to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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