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Cheap flights from Great Falls to London Heathrow Airport from £575

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/12. Fares are subject to change and may not be available on all flights or dates of travel.
GTF — LHR
13 Jul — 20 Jul1
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 June 2026.

Sun 6/1214:25
GTF
-
LHR
2 stops37h 40m
United Airlines
Wed 9/1207:30
LHR
-
GTF
2 stops20h 50m
United Airlines
Deal found 10/6£575
Sun 6/1216:55
GTF
-
LHR
1 stop12h 25m
Alaska Airlines
Wed 9/1214:45
LHR
-
GTF
1 stop32h 28m
Alaska Airlines
Deal found 10/6£662
Thu 27/806:15
GTF
-
LHR
1 stop20h 25m
United Airlines
Sat 5/906:55
LHR
-
GTF
2 stops21h 17m
United Airlines
Deal found 11/6£774
Tue 28/713:17
GTF
-
LHR
2 stops15h 03m
Delta
Tue 4/817:45
LHR
-
GTF
2 stops30h 53m
Delta
Deal found 13/6£796
Wed 12/806:15
GTF
-
LHR
1 stop20h 25m
United Airlines
Sun 16/809:30
LHR
-
GTF
2 stops42h 42m
United Airlines
Deal found 9/6£798

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 June 2026.

Round-trip from

£575
United Airlines
  • United Airlines
  • 6/12-9/12
  • 4 total stops
  • 58h 30m total
  • Great Falls to London
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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 June 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

Sun 6/12

14:25-11:05

2 stops37h 40m

London Heathrow

Wed 9/12

07:30-21:20

2 stops20h 50m

£575

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Sun 6/12

16:55-12:20

1 stop12h 25m

London Heathrow

Wed 9/12

14:45-16:13

1 stop32h 28m

£662
Fastest return journey

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Thu 27/8

06:15-06:55

2 stops17h 40m

London Heathrow

Sat 5/9

06:55-21:12

2 stops21h 17m

£778

Great FallsLondon

GTF - LHR

GTFLHR

Great Falls

Tue 28/7

13:17-11:20

2 stops15h 03m

London Heathrow

Tue 4/8

17:45-17:38

2 stops30h 53m

£796

Flights are sorted by cheapest return flights first.

Deals found on 11/6

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 fly from Great Falls to London Heathrow Airport in about 37h 40m. 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
Hounslow
Milton Keynes
Wembley
Luton
Gatwick
Slough
Ilford
Croydon
Hayes
Brentford
Colchester
Northampton
Kingston upon Thames
Eastbourne
Watford
Swindon
Ipswich
Poole
Guildford
Romford

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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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