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Cheap flights from Great Falls to London Heathrow Airport from £247

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 19/8. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — LHR
28 May — 4 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Great Falls to Heathrow

Enter your travel dates to find the best prices.

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 28 April 2026.

Sun 15/1114:25
GTF
-
LHR
2 stops59h 20m
United Airlines
Thu 19/1108:00
LHR
-
GTF
2 stops21h 30m
United Airlines
Deal found 26/4£641
Sun 1/1105:30
GTF
-
LHR
2 stops18h 35m
Delta
Tue 10/1106:20
LHR
-
GTF
2 stops18h 23m
Delta
Deal found 24/4£656
Sun 1/1114:25
GTF
-
LHR
1 stop12h 15m
United Airlines
Tue 10/1116:40
LHR
-
GTF
2 stops51h 49m
United Airlines
Deal found 24/4£658
Sun 1/1116:55
GTF
-
LHR
1 stop12h 25m
Multiple Airlines
Tue 10/1114:55
LHR
-
GTF
1 stop32h 18m
Multiple Airlines
Deal found 24/4£671
Tue 1/1214:25
GTF
-
LHR
1 stop12h 15m
United Airlines
Mon 7/1207:40
LHR
-
GTF
2 stops20h 40m
United Airlines
Deal found 23/4£687
Tue 1/1213:10
GTF
-
LHR
1 stop13h 50m
Delta
Sun 13/1210:45
LHR
-
GTF
1 stop19h 08m
Delta
Deal found 25/4£706

Find 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 28 April 2026.

Round-trip from

£913

One-way from

£247
United Airlines
  • United Airlines
  • 8/6-12/8
  • 4 total stops
  • 57h 28m total
  • Great Falls to London
Search Deals
United Airlines
  • United Airlines
  • 19/8
  • 2 total stops
  • 18h 30m total
  • Great Falls to London
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 28 April 2026.
Use the filters below to find and compare flights from Great Falls to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 16/7

12:30-10:40

2 stops15h 10m

London Heathrow

Wed 22/7

09:30-21:34

2 stops19h 04m

£972
Fastest return journey

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 8/6

13:22-10:00

1 stop13h 38m

London Heathrow

Wed 12/8

10:55-22:44

1 stop18h 49m

£997

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 8/6

18:52-06:45

1 stop28h 53m

London Heathrow

Wed 12/8

09:50-16:29

1 stop13h 39m

£1,005

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 16/7

13:15-17:40

3 stops21h 25m

London Heathrow

Wed 22/7

10:20-12:33

3 stops33h 13m

£3,889

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 7/6

18:52-20:20

2 stops42h 28m

London Heathrow

Sun 9/8

17:00-16:29

1 stop30h 29m

£4,608

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 1/10

17:19-06:45

1 stop30h 26m

London Heathrow

Thu 29/10

14:55-16:13

1 stop31h 18m

£5,161

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 8/6

18:25-06:25

2 stops29h 00m

London Heathrow

Wed 12/8

06:30-17:39

2 stops18h 09m

£5,295

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 8/6

06:15-06:55

2 stops17h 40m

London Heathrow

Wed 12/8

11:05-21:28

2 stops17h 23m

£5,410

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 7/9

17:25-06:55

2 stops30h 30m

London Heathrow

Mon 21/9

16:35-16:39

2 stops31h 04m

£6,501
Cheapest one-way

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 19/8

06:15-07:45

2 stops18h 30m

£247

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

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 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.

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?

    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 Heathrow. 0 airlines have flights from Great Falls to London Heathrow on a regular basis. Booking flights from Great Falls to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

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

    Airlines like United Airlines and KLM fly from Great Falls to London Heathrow Airport in about 13h 38m. The time it takes to get you to your destination can typically vary by up to 1h 32m. The distance between Great Falls and London Heathrow Airport is about 4472 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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 holiday 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.

See more FAQs

Travelling to a place near London Heathrow Airport?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Great Falls to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Great Falls to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Great Falls to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

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

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Great Falls to Heathrow for you. Better yet — we are completely free to use.

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

Yes, we can. To see specific flights from Great Falls to Heathrow 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 Heathrow become cheaper?

Of course! You can now track prices for flights from Great Falls to Heathrow and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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