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$399+ 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 1/13. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — LHR
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Kalispell to Heathrow

Best flights from Kalispell to Heathrow
Discover carefully curated flight deals from Kalispell to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/231:40 pmFCA - LHR
1 stop15h 20mUnited Airlines
Tue 1/2711:35 amLHR - FCA
1 stop17h 24mUnited Airlines
Deal found 12/9$656
This KLM deal was found by Cheapflights users on 12/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/233:00 pmFCA - LHR
1 stop15h 10mMultiple Airlines
Mon 5/47:45 pmLHR - FCA
2 stops28h 57mMultiple Airlines
Deal found 12/10$882
This United Airlines deal was found by Cheapflights users on 12/9. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/16:31 amFCA - LHR
1 stop22h 49mUnited Airlines
Mon 5/1110:50 amLHR - FCA
2 stops41h 40mUnited Airlines
Deal found 12/9$873

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 December 12, 2025.

Most accurate provider

Expedia
2 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$644
(United Airlines)

One-way from

$399
(United Airlines)

Popular in

May

Cheapest in

January

Average price

$958
Provider with most accurate pricing for Kalispell Glacier Park-London Heathrow flight deals.
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Provider most trusted by Cheapflights users for Kalispell Glacier Park-London Heathrow flights.
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From Kalispell Glacier Park to London Heathrow
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One-way flight from Kalispell Glacier Park to London Heathrow
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Highest demand for flights based on searches. 19% potential increase in price ($243 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($67 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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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 December 12, 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

Fri 1/23

1:40 pm-12:00 pm

1 stop15h 20m

London Heathrow

Tue 1/27

11:35 am-9:59 pm

1 stop17h 24m

$656

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Fri 5/1

6:31 am-12:20 pm

1 stop22h 49m

London Heathrow

Mon 5/11

10:50 am-9:30 pm

2 stops41h 40m

$873

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Thu 4/23

3:00 pm-1:10 pm

1 stop15h 10m

London Heathrow

Mon 5/4

7:45 pm-5:42 pm

2 stops28h 57m

$882

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Tue 1/13

6:00 am-6:40 am

2 stops17h 40m

$399

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 2/4

2:42 pm-9:20 pm

2 stops23h 38m

$405

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 2/4

12:25 pm-10:00 am

1 stop14h 35m

$419

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Tue 1/13

6:25 am-2:25 pm

3 stops25h 00m

$427

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

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 December.
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.

Cheapflights Insights

Everything you need to know about your flight from Kalispell to London Heathrow Airport

How much does it cost to fly round-trip from Kalispell to London Heathrow Airport?

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 December 12, 2025.
Read reviews from past customers who have flown Virgin Atlantic and 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.
Virgin Atlantic
7.5
Good
675 reviews

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Crew

8.2

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
Virgin Atlantic
7.5
Good
675 reviews
Virgin Atlantic
7.5
Good
675 reviews

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Crew

8.2

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!
United Airlines
7.4
Good
9,093 reviews
Virgin Atlantic
7.5
Good
675 reviews

Entertainment

7.5

Food

6.9

Boarding

7.7

Comfort

7.3

Crew

8.2

Overall

7.5

Reviews

1 / 20
6.0
Good

Pratap,Aug 2025

JFK - LHR

The flight is clean, food good and the staff are excellent! Very professional, polite and accommodating. The seat itself is really mediocre. Can’t believe there is not inch of storage space. Believe it or not it there is not place even to put away your phone or pen!! Very very surprising and terribly inconvenient. No coat hanger hook either. Had to give it away. ALL IN ALL VERY INCONVENIENT business class seat compared to their peers. What is even more surprising is that this on their relatively new fleet of Airbus A350-1000. I was having com platelets different expectations of Virgin and this has disappointed me. Everything else is just as good and as you would expect from Virgin!

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. 2 airlines 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 can get you from Kalispell to London Heathrow Airport in just under 15h 20m. Your travel time can differ by up to . Airlines will cover a distance of 4512 mi.

  • What are the cheapest airlines flying from Kalispell to London Heathrow Airport round-trip?

    Flying on Virgin Atlantic is currently your cheapest option to London Heathrow Airport, with prices starting at $707. Another option worth looking into is United Airlines, starting at $733 round trip. These flights start at 27% 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
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Winchester
Croydon
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames
Wembley

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Top 2 airlines flying from Kalispell to Heathrow

Discover the top 2 airlines 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Virgin AtlanticCheapest$707Average$1,046FlexibilityNo cancel feeOn-time72%
United AirlinesCheapest$733Average$851FlexibilityNo cancel feeOn-time69%

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