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 15h 01m. Your travel time can differ by up to 6h 39m. 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 $741. This flight start at 28% lower than the current average price 3 months from now.

What is the cheapest month to book a flight from Kalispell to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Kalispell to London Heathrow Airport (average of $661). Flying from Kalispell to London Heathrow Airport in June is currently the most expensive (average of $1,098). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from Kalispell to London Heathrow Airport?

Travelers seeking maximum savings on their Kalispell to London Heathrow Airport flight should consider departing on Monday mornings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

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

Thursday flights are found to be more expensive to fly from Kalispell to London Heathrow Airport. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to London Heathrow Airport.

What is the cheapest month to fly from Kalispell to London Heathrow Airport?

The best pricing can be found in the month of September. Prices to London Heathrow Airport from Kalispell average $1,033. You can even find prices in September for less than $1,033, as users have found deals to London Heathrow Airport from as low as $737. The month of December appears to be one of the more expensive times to travel to London Heathrow Airport from Kalispell. Flying in the targeted month can save you up to 57%.

What is the cheapest time of day to fly from FCA to LHR?

One of the essential ways to save on airfare from Kalispell to London Heathrow Airport is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 6% on airfare.

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.

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.

$631+ Flights from Kalispell to London Heathrow Airport

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

Airfare is below average for this route at the moment. Kalispell to London Heathrow Airport flights typically cost between $708 and $809 in February. The cheapest round-trip price found within the last 3 days was $631 on Multiple Airlines (Feb 18-Mar 11).

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Cheap flight deals from Kalispell to Heathrow

Round-trip from	$631 (KLM)
Popular in	August
Cheapest in	April
Average price	$782

From Kalispell Glacier Park to London Heathrow

Search Deals

Highest demand for flights based on searches. 20% potential increase in price ($262 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 9% potential price decrease ($91 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in September 2025

Search Deals

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 September 11, 2025.

Wed 10/155:20 amFCA - LHR

2 stops25h 10mDelta

Mon 10/208:10 pmLHR - FCA

2 stops25h 19mDelta

Deal found 9/9

$685

Wed 10/1512:00 pmFCA - LHR

2 stops16h 20mVirgin Atlantic

Mon 10/205:25 pmLHR - FCA

2 stops36h 44mVirgin Atlantic

Deal found 9/9

$699

Fri 9/191:54 pmFCA - LHR

1 stop14h 16mUnited Airlines

Tue 9/303:50 pmLHR - FCA

2 stops26h 45mUnited Airlines

Deal found 9/10

$716

Wed 10/156:30 amFCA - LHR

1 stop20h 10mUnited Airlines

Mon 10/2011:25 amLHR - FCA

1 stop17h 06mUnited Airlines

Deal found 9/9

$732

Thu 10/26:30 amFCA - LHR

1 stop22h 50mUnited Airlines

Sun 10/511:25 amLHR - FCA

1 stop17h 06mUnited Airlines

Deal found 9/10

$762

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 September 11, 2025.

Wed 2/1811:59 amFCA - LHR

1 stop15h 01mMultiple Airlines

Wed 3/116:20 amLHR - FCA

2 stops17h 26mMultiple Airlines

Deal found 9/10

$631

Wed 2/1811:59 amFCA - LHR

1 stop15h 01mKLM

Mon 3/98:25 pmLHR - FCA

2 stops27h 21mKLM

Deal found 9/10

$632

Mon 2/165:20 amFCA - LHR

1 stop21h 40mDelta

Wed 3/1110:45 amLHR - FCA

1 stop18h 22mDelta

Deal found 9/10

$639

Mon 2/165:20 amFCA - LHR

1 stop21h 40mDelta

Tue 3/1010:45 amLHR - FCA

1 stop18h 22mDelta

Deal found 9/10

$639

Fri 2/2011:59 amFCA - LHR

1 stop15h 01mMultiple Airlines

Wed 3/116:20 amLHR - FCA

2 stops17h 26mMultiple Airlines

Deal found 9/10

$681

Wed 2/1811:59 amFCA - LHR

1 stop15h 01mDelta

Thu 3/1210:45 amLHR - FCA

1 stop18h 22mDelta

Deal found 9/10

$639

Wed 2/185:20 amFCA - LHR

2 stops18h 45mDelta

Mon 3/96:20 amLHR - FCA

2 stops17h 26mDelta

Deal found 9/10

$685

Wed 10/155:20 amFCA - LHR

2 stops25h 10mDelta

Mon 10/208:10 pmLHR - FCA

2 stops25h 19mDelta

Deal found 9/9

$685

Sat 2/2111:59 amFCA - LHR

1 stop15h 01mDelta

Thu 3/1210:45 amLHR - FCA

1 stop18h 22mDelta

Deal found 9/10

$689

Tue 2/175:20 amFCA - LHR

1 stop21h 40mDelta

Sat 3/710:45 amLHR - FCA

1 stop19h 22mDelta

Deal found 9/10

$689

Fri 2/2011:59 amFCA - LHR

1 stop15h 01mDelta

Wed 3/1110:45 amLHR - FCA

1 stop18h 22mDelta

Deal found 9/10

$689

Tue 2/175:20 amFCA - LHR

1 stop21h 40mDelta

Sun 3/810:45 amLHR - FCA

1 stop18h 22mDelta

Deal found 9/10

$689

Last-minute flights from Kalispell to Heathrow
Discover last-minute flight deals from Kalispell to Heathrow. Data last updated September 11, 2025 and is based on user searches.

Fri 9/191:54 pmFCA - LHR

1 stop14h 16mUnited Airlines

Tue 9/303:50 pmLHR - FCA

2 stops26h 45mUnited Airlines

Deal found 9/10

$716

Thu 10/26:30 amFCA - LHR

1 stop22h 50mUnited Airlines

Sun 10/511:25 amLHR - FCA

1 stop17h 06mUnited Airlines

Deal found 9/10

$762

Wed 10/155:20 amFCA - LHR

2 stops25h 10mDelta

Mon 10/208:10 pmLHR - FCA

2 stops25h 19mDelta

Deal found 9/9

$685

Wed 10/1512:00 pmFCA - LHR

2 stops16h 20mVirgin Atlantic

Mon 10/205:25 pmLHR - FCA

2 stops36h 44mVirgin Atlantic

Deal found 9/9

$699

Wed 10/156:30 amFCA - LHR

1 stop20h 10mUnited Airlines

Mon 10/2011:25 amLHR - FCA

1 stop17h 06mUnited Airlines

Deal found 9/9

$732

Cheapflights Fare Finder

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

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 2/18

11:59 am-10:00 am

1 stop15h 01m

London Heathrow

Wed 3/11

6:20 am-5:46 pm

2 stops17h 26m

$631

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 2/18

11:59 am-10:00 am

1 stop15h 01m

London Heathrow

Mon 3/9

8:25 pm-5:46 pm

2 stops27h 21m

$632

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Mon 2/16

5:20 am-10:00 am

1 stop21h 40m

London Heathrow

Wed 3/11

10:45 am-11:07 pm

1 stop18h 22m

$639

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Mon 2/16

5:20 am-10:00 am

1 stop21h 40m

London Heathrow

Tue 3/10

10:45 am-11:07 pm

1 stop18h 22m

$639

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 2/18

11:59 am-10:00 am

1 stop15h 01m

London Heathrow

Thu 3/12

10:45 am-11:07 pm

1 stop18h 22m

$639

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Fri 2/20

11:59 am-10:00 am

1 stop15h 01m

London Heathrow

Wed 3/11

6:20 am-5:46 pm

2 stops17h 26m

$681

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 2/18

5:20 am-7:05 am

2 stops18h 45m

London Heathrow

Mon 3/9

6:20 am-5:46 pm

2 stops17h 26m

$685

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 10/15

5:20 am-1:30 pm

2 stops25h 10m

London Heathrow

Mon 10/20

8:10 pm-2:29 pm

2 stops25h 19m

$685

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Sat 2/21

11:59 am-10:00 am

1 stop15h 01m

London Heathrow

Thu 3/12

10:45 am-11:07 pm

1 stop18h 22m

$689

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Tue 2/17

5:20 am-10:00 am

1 stop21h 40m

London Heathrow

Sat 3/7

10:45 am-11:07 pm

1 stop19h 22m

$689

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 12 results

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

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

8,937 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,937 reviews

United Airlines

7.4

Good

8,937 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

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 15h 01m. Your travel time can differ by up to 6h 39m. 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 $741. This flight start at 28% 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.
What is the cheapest month to book a flight from Kalispell to London Heathrow Airport?
Currently, November is the cheapest month in which you can book a flight from Kalispell to London Heathrow Airport (average of $661). Flying from Kalispell to London Heathrow Airport in June is currently the most expensive (average of $1,098). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Harrow

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Broadway

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Top airline flying from Kalispell to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$741	Average$949	FlexibilityNo cancel fee	On-time69%

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$631+ Cheap flights from Kalispell (FCA) to Heathrow (LHR)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/18. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Kalispell to Heathrow with Cheapflights

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2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Kalispell to Heathrow

Round-trip from

Popular in

Cheapest in

Average price

Find flight deals from Kalispell to Heathrow

Cheapest flights from Kalispell to HeathrowExplore 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 September 11, 2025.

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 September 11, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Kalispell to London Heathrow Airport that are best for you.

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.

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

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.

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?

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

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

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

How can I find direct flights from Kalispell to Heathrow?

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

What is the cheapest month to book a flight from Kalispell to London Heathrow Airport?

Traveling to a place near London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Kalispell to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Kalispell to Heathrow

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Travel Smart

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 September 11, 2025.