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Cheap flights from Great Falls to London Heathrow Airport from £311

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 21/10. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — LHR
28 Aug — 4 Sep1
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 29 July 2026.

Mon 9/1106:30
GTF
-
LHR
2 stops17h 40m
United Airlines
Wed 11/1106:35
LHR
-
GTF
2 stops22h 03m
United Airlines
Deal found 26/7£567
Tue 3/1116:57
GTF
-
LHR
1 stop12h 23m
Alaska Airlines
Tue 17/1114:45
LHR
-
GTF
1 stop32h 32m
Alaska Airlines
Deal found 29/7£648
Mon 2/1118:27
GTF
-
LHR
1 stop32h 33m
Delta
Mon 16/1111:45
LHR
-
GTF
2 stops36h 56m
Delta
Deal found 29/7£658
Tue 3/1113:13
GTF
-
LHR
2 stops17h 32m
Multiple Airlines
Tue 17/1120:25
LHR
-
GTF
2 stops28h 16m
Multiple Airlines
Deal found 29/7£661
Sun 1/1118:27
GTF
-
LHR
1 stop32h 33m
Delta
Wed 18/1106:20
LHR
-
GTF
2 stops23h 26m
Delta
Deal found 29/7£663
Sun 1/1118:27
GTF
-
LHR
2 stops33h 18m
Delta
Mon 16/1111:45
LHR
-
GTF
2 stops36h 56m
Delta
Deal found 29/7£664
Sun 1/1118:27
GTF
-
LHR
2 stops29h 38m
Delta
Fri 20/1106:20
LHR
-
GTF
2 stops18h 21m
Delta
Deal found 29/7£666
Sun 1/1116:57
GTF
-
LHR
1 stop12h 23m
Alaska Airlines
Wed 18/1114:45
LHR
-
GTF
1 stop32h 32m
Alaska Airlines
Deal found 29/7£668
Mon 9/1116:57
GTF
-
LHR
1 stop12h 23m
Alaska Airlines
Wed 11/1114:45
LHR
-
GTF
1 stop32h 32m
Alaska Airlines
Deal found 24/7£669
Sat 31/1006:30
GTF
-
LHR
2 stops43h 20m
United Airlines
Wed 18/1107:30
LHR
-
GTF
2 stops21h 08m
United Airlines
Deal found 29/7£675

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 29 July 2026.

Round-trip from

£567

One-way from

£311
United Airlines
  • United Airlines
  • 9/11-11/11
  • 4 total stops
  • 39h 43m total
  • Great Falls to London
Search Deals
21/10
  • 21/10
  • 3 total stops
  • 32h 50m 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 29 July 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
Fastest return journey

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/11

06:30-07:10

2 stops17h 40m

London Heathrow

Wed 11/11

06:35-21:38

2 stops22h 03m

£567

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 1/11

18:27-10:00

1 stop32h 33m

London Heathrow

Tue 17/11

06:20-17:41

2 stops18h 21m

£663

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 5/1

16:55-12:20

1 stop12h 25m

London Heathrow

Tue 12/1

14:45-16:13

1 stop32h 28m

£668

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 5/1

05:30-07:05

2 stops18h 35m

London Heathrow

Tue 12/1

17:50-17:43

2 stops30h 53m

£668

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 9/11

16:57-12:20

1 stop12h 23m

London Heathrow

Wed 11/11

14:45-16:17

1 stop32h 32m

£668

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sat 31/10

14:45-07:50

2 stops35h 05m

London Heathrow

Thu 19/11

11:35-21:38

1 stop17h 03m

£689
Cheapest one-way
Fastest single journey

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 21/10

14:37-12:35

1 stop14h 58m

£348

Flights are sorted by cheapest return flights first.

Deals found on 29/7

Sorted by cheapest first

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 Delta fly from Great Falls to London Heathrow Airport in about 17h 40m. The time it takes to get you to your destination can typically vary by up to 14h 53m. 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
Hounslow
Milton Keynes
Luton
Gatwick
Wembley
Slough
Ilford
Hayes
Croydon
Colchester
Brentford
Eastbourne
Northampton
Watford
Swindon
Southend-on-Sea
Enfield
Kingston upon Thames
Poole
Southall

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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Billings to Heathrow flights

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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