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Cheap flights from Kalispell to London Heathrow Airport from £455

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 18/12. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — LHR
14 Sep — 21 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Kalispell to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from Kalispell to Heathrow
Explore the most affordable flight options available from Kalispell to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 15 August 2026.

Sun 6/1214:10 -
1 stop15h 10m
Tue 8/1214:45 -
1 stop16h 14m
Deal found 11/8£657
Sun 6/1214:29 -
1 stop12h 11m
Tue 8/1218:00 -
2 stops34h 30m
Deal found 11/8£659
Wed 9/1212:25 -
1 stop14h 35m
Sun 10/117:05 -
2 stops31h 40m
Deal found 10/8£706
Wed 9/1212:25 -
2 stops16h 15m
Sun 10/120:25 -
2 stops28h 20m
Deal found 10/8£709
Sun 27/906:35 -
2 stops18h 05m
Sun 4/1008:40 -
2 stops22h 03m
Deal found 13/8£714
Sun 27/906:05 -
1 stop20h 35m
Sun 4/1012:05 -
2 stops30h 23m
Deal found 13/8£717
Thu 10/917:04 -
1 stop12h 21m
Thu 17/906:50 -
2 stops19h 14m
Deal found 11/8£730
Wed 9/1214:29 -
1 stop12h 11m
Sun 10/111:35 -
1 stop16h 55m
Deal found 10/8£748

Find flight deals from Kalispell to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Kalispell (FCA) 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 15 August 2026.

Round-trip from

£657

One-way from

£455
Alaska Airlines
  • Alaska Airlines
  • 6/12-8/12
  • 2 total stops
  • 31h 24m total
  • Kalispell to London
Search Deals
United Airlines
  • United Airlines
  • 18/12
  • 2 total stops
  • 37h 35m total
  • Kalispell to London
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Kalispell 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 15 August 2026.
Use the filters below to find and compare flights from Kalispell to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

KalispellLondon

FCA Kalispell Glacier Park - LHR London Heathrow

FCALHR

Kalispell Glacier Park

Sun 6/12

14:10-12:20

1 stop15h 10m

London Heathrow

Tue 8/12

14:45-23:59

1 stop16h 14m

£657

KalispellLondon

FCA Kalispell Glacier Park - LHR London Heathrow

FCALHR

Kalispell Glacier Park

Sun 6/12

14:29-09:40

1 stop12h 11m

London Heathrow

Tue 8/12

18:00-21:30

2 stops34h 30m

£659

KalispellLondon

FCA Kalispell Glacier Park - LHR London Heathrow

FCALHR

Kalispell Glacier Park

Sun 27/9

10:45-12:35

1 stop18h 50m

London Heathrow

Sun 4/10

11:25-21:36

1 stop17h 11m

£729
Fastest return journey

KalispellLondon

FCA Kalispell Glacier Park - LHR London Heathrow

FCALHR

Kalispell Glacier Park

Wed 9/12

14:29-09:40

1 stop12h 11m

London Heathrow

Sun 10/1

11:35-21:30

1 stop16h 55m

£748
Cheapest one-way

KalispellLondon

FCA Kalispell Glacier Park - LHR London Heathrow

FCALHR

Kalispell Glacier Park

Fri 18/12

14:45-11:20

2 stops37h 35m

£455
Fastest single journey

KalispellLondon

FCA Kalispell Glacier Park - LHR London Heathrow

FCALHR

Kalispell Glacier Park

Fri 18/12

14:08-12:20

1 stop15h 12m

£682

Flights are sorted by cheapest return flights first.

Deals found on 14/8

Sorted by cheapest first

Best time to book a flight from Kalispell to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Kalispell 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 Kalispell 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 Kalispell to London Heathrow?

    Located just 8.4 mi from the city center, Kalispell Glacier Park is the airport most travelers will use when flying to London Heathrow from Kalispell. Booking flights from Glacier Park (FCA) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 0 different airlines.

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

    There are many flights that can get you from Kalispell to London Heathrow Airport in 12h 11m. Fly via Alaska Airlines or United Airlines to get the fastest option. The distance between Kalispell and London Heathrow Airport is about 4512 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Kalispell to Heathrow that include hotel bookings?

    Yes. In addition to deals on Kalispell to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Kalispell to Heathrow?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Kalispell to Heathrow.

  • Can I find deals for business class flights from Kalispell to Heathrow?

    Yes. Cheapflights offers flight deals from Kalispell 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
Ilford
Slough
Hayes
Croydon
Colchester
Brentford
Eastbourne
Northampton
Watford
Southend-on-Sea
Swindon
Enfield
Kingston upon Thames
Southall
Poole

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Kalispell 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 Kalispell to Heathrow?

When you search for this flight from Kalispell to Heathrow, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Cheapflights simply makes it quick and affordable to book flights from Kalispell to Heathrow 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 Kalispell to Heathrow with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Kalispell to Heathrow, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Kalispell to Heathrow become cheaper?

Yes! Start tracking prices for Kalispell to Heathrow 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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