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Cheap flights from Great Falls to London Heathrow Airport from £582

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/11. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — LHR
12 Apr — 19 Apr1
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 13 March 2026.

Fri 13/1114:25
GTF
-
LHR
1 stop12h 15m
United Airlines
Tue 17/1106:35
LHR
-
GTF
2 stops37h 54m
United Airlines
Deal found 8/3£582
Fri 17/414:30
GTF
-
LHR
2 stops59h 05m
United Airlines
Fri 8/507:25
LHR
-
GTF
2 stops37h 09m
United Airlines
Deal found 8/3£596
Mon 27/406:15
GTF
-
LHR
1 stop20h 25m
United Airlines
Fri 15/507:30
LHR
-
GTF
2 stops20h 48m
United Airlines
Deal found 8/3£598
Tue 14/414:30
GTF
-
LHR
1 stop12h 10m
United Airlines
Thu 7/517:40
LHR
-
GTF
2 stops34h 38m
United Airlines
Deal found 8/3£599
Tue 14/406:15
GTF
-
LHR
1 stop23h 10m
United Airlines
Tue 5/511:25
LHR
-
GTF
1 stop16h 53m
United Airlines
Deal found 8/3£610
Sat 18/414:30
GTF
-
LHR
2 stops23h 50m
United Airlines
Tue 5/514:50
LHR
-
GTF
1 stop13h 28m
United Airlines
Deal found 8/3£614

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 13 March 2026.

Round-trip from

£596
United Airlines
  • United Airlines
  • 17/4-8/5
  • 4 total stops
  • 96h 14m 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 13 March 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

Mon 27/4

14:30-12:25

1 stop14h 55m

London Heathrow

Mon 4/5

09:00-21:18

2 stops43h 18m

£635

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 3/5

06:15-09:40

1 stop20h 25m

London Heathrow

Sun 10/5

14:50-21:18

1 stop13h 28m

£648
Fastest return journey

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 15/4

14:30-09:40

1 stop12h 10m

London Heathrow

Mon 11/5

14:50-21:18

1 stop13h 28m

£648

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Wed 15/4

14:30-09:40

1 stop12h 10m

London Heathrow

Sat 9/5

14:50-21:18

1 stop13h 28m

£648

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 26/4

14:30-12:35

1 stop15h 05m

London Heathrow

Sun 3/5

14:05-21:18

2 stops38h 13m

£672

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 20/4

05:30-13:15

2 stops24h 45m

London Heathrow

Tue 5/5

12:25-22:29

2 stops17h 04m

£708

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Mon 20/4

13:09-12:10

2 stops16h 01m

London Heathrow

Wed 6/5

12:25-22:29

2 stops17h 04m

£708

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 31/3

14:30-09:40

1 stop12h 10m

London Heathrow

Thu 30/4

06:55-21:18

2 stops21h 23m

£726

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 7/4

14:30-12:25

1 stop14h 55m

London Heathrow

Fri 17/4

09:30-21:17

2 stops18h 47m

£735

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 16/4

13:09-15:35

2 stops19h 26m

London Heathrow

Sat 9/5

06:15-17:39

2 stops18h 24m

£767

Flights are sorted by cheapest return flights first.

Deals found on 13/3

Showing 1-10 of 11 resultsSorted by cheapest first
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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 fly from Great Falls to London Heathrow Airport in about 12h 10m. The time it takes to get you to your destination can typically vary by up to . The distance between Great Falls and London Heathrow Airport is about 4472 mi.

  • 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
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Chelmsford
Eastbourne
Ipswich
Swindon
Bedford

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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