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$491+ Cheap flights from Kalispell (FCA) to Heathrow (LHR)

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 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — LHR
Nov 27 — Dec 41
Thu 11/27
Thu 12/4
1 adult, Economy
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Find flight deals from Kalispell to Heathrow

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 October 28, 2025.

This Delta deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/75:00 amFCA - LHR
2 stops21h 00mDelta
Sun 12/1411:05 amLHR - FCA
2 stops19h 05mDelta
Deal found 10/27$654
This United Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:15 amFCA - LHR
1 stop20h 25mUnited Airlines
Thu 12/1811:35 amLHR - FCA
1 stop17h 24mUnited Airlines
Deal found 10/27$674
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/126:15 amFCA - LHR
2 stops16h 40mUnited Airlines
Fri 12/194:20 pmLHR - FCA
2 stops36h 39mUnited Airlines
Deal found 10/28$739
This American Airlines deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/72:00 pmFCA - LHR
1 stop15h 20mMultiple Airlines
Sun 12/141:45 pmLHR - FCA
1 stop30h 35mMultiple Airlines
Deal found 10/27$843
This Expedia deal was found by Cheapflights users on 10/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/76:30 amFCA - LHR
2 stops30h 00mMultiple Airlines
Fri 12/1212:15 pmLHR - FCA
2 stops18h 43mMultiple Airlines
Deal found 10/27$992
This AranGrant deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:16 pmFCA - LHR
1 stop15h 04mBritish Airways
Tue 1/69:25 amLHR - FCA
1 stop21h 50mBritish Airways
Deal found 10/26$4,222
This Expedia deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/306:05 amFCA - LHR
2 stops21h 45mMultiple Airlines
Tue 1/612:15 pmLHR - FCA
2 stops19h 00mMultiple Airlines
Deal found 10/26$4,330
This United Airlines deal was found by Cheapflights users on 10/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:38 pmFCA - LHR
1 stop15h 37mUnited Airlines
Tue 1/66:00 pmLHR - FCA
2 stops34h 59mUnited Airlines
Deal found 10/26$4,400

Cheap 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 October 28, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$601
(KLM)

One-way from

$491
(Kiwi.com)

Popular in

December

Cheapest in

October

Average price

$800
Provider with most accurate pricing for Kalispell Glacier Park-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Kalispell Glacier Park-London Heathrow flights.
Search Deals
From Kalispell Glacier Park to London Heathrow
Search Deals
One-way flight from Kalispell Glacier Park to London Heathrow
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($157 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($64 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated October 28, 2025.
Use the filters below to find and compare flights from Kalispell to London Heathrow Airport that are best for you.

Fly from

Kalispell

Fly to

Heathrow

Route

Depart

Return

Price

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Tue 1/13

12:15 pm-10:00 am

1 stop14h 45m

London Heathrow

Thu 1/22

8:25 pm-5:14 pm

2 stops27h 49m

$601

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Sun 12/7

5:00 am-9:00 am

2 stops21h 00m

London Heathrow

Sun 12/14

11:05 am-11:10 pm

2 stops19h 05m

$654

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Thu 12/11

5:00 am-8:45 am

2 stops20h 45m

London Heathrow

Thu 12/18

10:45 am-11:10 pm

1 stop19h 25m

$654

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Thu 12/11

6:15 am-9:40 am

1 stop20h 25m

London Heathrow

Thu 12/18

11:35 am-9:59 pm

1 stop17h 24m

$674

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Fri 12/12

6:15 am-5:55 am

2 stops16h 40m

London Heathrow

Fri 12/19

4:20 pm-9:59 pm

2 stops36h 39m

$739

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Fri 3/27

6:31 am-11:20 am

2 stops22h 49m

London Heathrow

Tue 3/31

3:50 pm-9:30 pm

2 stops36h 40m

$796

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Fri 4/24

6:42 pm-1:55 pm

3 stops36h 13m

$491

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Fri 4/24

3:00 pm-1:10 pm

1 stop15h 10m

$518

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Fri 12/19

5:15 pm-8:30 am

2 stops32h 15m

$851

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Fri 12/19

12:58 pm-12:50 pm

3 stops40h 52m

$1,163

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/26

Showing 1-10 of 11 results
1
2

Compare providers for flights from Kalispell to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Kalispell to Heathrow in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Kalispell-London Heathrow Airport flights, users find the pricing of Expedia to be most consistent on Cheapflights vs. Expedia Users can find the same prices on Kalispell-London Heathrow Airport flight deals on Cheapflights vs. Expedia 90-95% of the time. Price accuracy is based on data collected from Kalispell-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Kalispell-London Heathrow Airport flights, Cheapflights users trust Expedia the most. Expedia has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Kalispell-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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.

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated October 28, 2025.
Read reviews from past customers who have flown United Airlines from Kalispell to London Heathrow Airport. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,001 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,001 reviews
United Airlines
7.4
Good
9,001 reviews

Boarding

7.7

Crew

8.1

Overall

7.4

Comfort

7.3

Food

6.6

Entertainment

7.1

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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?

    Kalispell Glacier Park (FCA), located 8.4 mi from the city center, is the airport you fly out of when you book flights from Kalispell to London Heathrow. 1 airline have flights from Glacier Park to London Heathrow on a regular basis. Booking flights from Kalispell Glacier Park 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 Kalispell to London Heathrow Airport?

    KLM and Delta can get you from Kalispell to London Heathrow Airport in just under 14h 45m. Your travel time can differ by up to 6h 15m. Airlines will cover a distance of 4512 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What is the cheapest airline to fly from Kalispell to London Heathrow Airport round-trip?

    Flying on United Airlines is currently your cheapest option to London Heathrow Airport, with prices starting at $733.

  • 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 vacation 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Ilford
Hayes
Southend-on-Sea
Harrow
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Chipping Norton
Wembley
Folkestone

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Top airline flying from Kalispell to Heathrow

Discover the top airline that operate flights from Kalispell to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$733Average$875FlexibilityNo cancel feeOn-time69%

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