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$514+ 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 7/18. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — LHR
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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Cheap 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 March 10, 2026.

This United Airlines deal was found by Cheapflights users on 3/6. 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.
Wed 8/196:31 am
FCA
-
LHR
1 stop22h 49m
United Airlines
Wed 8/265:40 pm
LHR
-
FCA
2 stops32h 08m
United Airlines
Deal found 3/6$897
This KLM deal was found by Cheapflights users on 3/8. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/72:23 pm
FCA
-
LHR
1 stop15h 42m
KLM
Tue 4/148:55 pm
LHR
-
FCA
2 stops27h 35m
KLM
Deal found 3/8$914
This KLM deal was found by Cheapflights users on 3/7. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/222:49 pm
FCA
-
LHR
1 stop15h 16m
Multiple Airlines
Wed 4/296:15 am
LHR
-
FCA
2 stops18h 15m
Multiple Airlines
Deal found 3/7$921
This United Airlines deal was found by Cheapflights users on 3/8. 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 4/76:00 am
FCA
-
LHR
2 stops22h 55m
United Airlines
Tue 4/1410:50 am
LHR
-
FCA
2 stops33h 41m
United Airlines
Deal found 3/8$924
This United Airlines deal was found by Cheapflights users on 3/7. 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 5/122:33 pm
FCA
-
LHR
1 stop12h 07m
United Airlines
Wed 6/36:50 am
LHR
-
FCA
2 stops35h 39m
United Airlines
Deal found 3/7$933
This United Airlines deal was found by Cheapflights users on 3/7. 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.
Wed 4/222:33 pm
FCA
-
LHR
2 stops19h 32m
United Airlines
Wed 4/2912:05 pm
LHR
-
FCA
2 stops40h 52m
United Airlines
Deal found 3/7$936
This Delta deal was found by Cheapflights users on 3/9. 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.
Wed 8/195:25 am
FCA
-
LHR
2 stops17h 55m
Delta
Wed 8/266:30 am
LHR
-
FCA
2 stops18h 12m
Delta
Deal found 3/9$938
This United Airlines deal was found by Cheapflights users on 3/8. 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 4/306:00 am
FCA
-
LHR
2 stops21h 00m
United Airlines
Thu 5/72:05 pm
LHR
-
FCA
2 stops38h 52m
United Airlines
Deal found 3/8$946
This Alaska Airlines deal was found by Cheapflights users on 3/10. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/198:00 pm
FCA
-
LHR
1 stop12h 05m
Alaska Airlines
Wed 8/265:00 pm
LHR
-
FCA
1 stop26h 14m
Alaska Airlines
Deal found 3/10$949

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 March 10, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$897
(United Airlines)

One-way from

$514
(United Airlines)

Popular in

July

Cheapest in

January

Average price

$1,046
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. 39% potential increase in price ($713 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 14% potential price decrease ($136 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
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 March 10, 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 round-trip

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 8/19

6:31 am-12:20 pm

1 stop22h 49m

London Heathrow

Wed 8/26

5:40 pm-6:48 pm

2 stops32h 08m

$897

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 4/22

2:49 pm-1:05 pm

1 stop15h 16m

London Heathrow

Wed 4/29

6:15 am-5:30 pm

2 stops18h 15m

$921

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Tue 4/7

6:00 am-11:55 am

2 stops22h 55m

London Heathrow

Tue 4/14

10:50 am-1:31 pm

2 stops33h 41m

$924

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 8/19

5:25 am-6:20 am

2 stops17h 55m

London Heathrow

Wed 8/26

6:30 am-11:02 pm

2 stops23h 32m

$938
Quickest round-trip

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 4/22

2:49 pm-1:05 pm

1 stop15h 16m

London Heathrow

Wed 4/29

10:55 am-5:30 pm

1 stop13h 35m

$942

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 5/13

6:00 am-5:55 am

2 stops16h 55m

London Heathrow

Wed 6/3

10:25 am-9:47 pm

2 stops18h 22m

$1,025

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Thu 9/3

4:08 pm-6:30 am

2 stops31h 22m

London Heathrow

Mon 9/14

4:25 pm-6:48 pm

2 stops33h 23m

$1,031
Cheapest one-way
Quickest one-way

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Sat 7/18

7:45 am-8:40 pm

2 stops29h 55m

$514

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/8

Sorted by cheapest first

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice 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 Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on Kalispell-London Heathrow Airport flight deals on Cheapflights vs. Ovago 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 Ovago the most. Ovago 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 March 10, 2026.
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
9,409 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family
United Airlines
7.4
Good
9,409 reviews
United Airlines
7.4
Good
9,409 reviews

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Dane,Jan 2026

TYS - IAD

It was a short flight, so no time for amenities. Just glad everything was quick and easy from boarding to arriving at my destination with my family

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?

    United Airlines and Delta can get you from Kalispell to London Heathrow Airport in just under 12h 07m. Your travel time can differ by up to 3h 43m. 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. This flight start at 32% lower than the current average price 3 months from now.

  • 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
Ilford
Hounslow
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Orpington
Watford
Northampton
Borehamwood
Broadway
Aylesbury
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne

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.
Bozeman to Heathrow flights
Cody to Heathrow flights

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 March 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$733Average$924FlexibilityNo cancel feeOn-time69%

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