HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$660+ 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 4/30. Fares are subject to change and may not be available on all flights or dates of travel.
FCA — LHR
May 24 — May 311
Sun 5/24
Sun 5/31
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Kalispell to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 April 24, 2026.

This United Airlines deal was found by Cheapflights users on 4/20. 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 8/1910:47 am
FCA
-
LHR
1 stop18h 48m
United Airlines
Wed 8/262:05 pm
LHR
-
FCA
2 stops32h 22m
United Airlines
Deal found 4/20$887
This Alaska Airlines deal was found by Cheapflights users on 4/22. 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.
Sun 11/86:33 am
FCA
-
LHR
1 stop22h 47m
Alaska Airlines
Thu 11/122:45 pm
LHR
-
FCA
1 stop28h 29m
Alaska Airlines
Deal found 4/22$894
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Sun 10/112:30 pm
FCA
-
LHR
1 stop12h 10m
United Airlines
Fri 10/169:30 am
LHR
-
FCA
2 stops16h 05m
United Airlines
Deal found 4/20$911
This American Airlines deal was found by Cheapflights users on 4/22. 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.
Wed 8/193:50 pm
FCA
-
LHR
1 stop15h 35m
American Airlines
Wed 8/262:45 pm
LHR
-
FCA
1 stop28h 49m
American Airlines
Deal found 4/22$912
This American Airlines deal was found by Cheapflights users on 4/22. 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.
Wed 8/191:25 pm
FCA
-
LHR
1 stop12h 40m
Multiple Airlines
Wed 8/2610:45 am
LHR
-
FCA
2 stops19h 11m
Multiple Airlines
Deal found 4/22$945
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Sat 10/102:30 pm
FCA
-
LHR
1 stop14h 55m
United Airlines
Fri 10/1611:25 am
LHR
-
FCA
1 stop17h 02m
United Airlines
Deal found 4/20$957
This United Airlines deal was found by Cheapflights users on 4/23. 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.
Sun 11/82:29 pm
FCA
-
LHR
1 stop12h 11m
United Airlines
Thu 11/1211:35 am
LHR
-
FCA
1 stop16h 55m
United Airlines
Deal found 4/23$967
This United Airlines deal was found by Cheapflights users on 4/20. 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.
Sun 10/1110:45 am
FCA
-
LHR
2 stops18h 05m
United Airlines
Sat 10/179:30 am
LHR
-
FCA
2 stops16h 05m
United Airlines
Deal found 4/20$969

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 April 24, 2026.

Most accurate provider

Ovago
2 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$887
(United Airlines)

One-way from

$660
(American Airlines)

Popular in

March

Cheapest in

October

Average price

$1,038
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. 23% potential increase in price ($360 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease ($94 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 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 April 24, 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

10:47 am-12:35 pm

1 stop18h 48m

London Heathrow

Wed 8/26

2:05 pm-3:27 pm

2 stops32h 22m

$887

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 8/19

6:59 am-10:30 am

2 stops20h 31m

London Heathrow

Wed 8/26

6:30 am-11:02 pm

2 stops23h 32m

$1,011

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Mon 5/4

6:00 am-9:40 am

1 stop20h 40m

London Heathrow

Wed 5/13

11:25 am-9:57 pm

1 stop17h 32m

$1,057
Quickest round-trip

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Sun 10/11

6:10 pm-4:15 pm

2 stops15h 05m

London Heathrow

Sun 10/18

10:55 am-11:07 pm

1 stop19h 12m

$1,061

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 5/13

6:00 am-7:15 am

2 stops18h 15m

London Heathrow

Mon 5/18

4:25 pm-9:57 pm

2 stops36h 32m

$1,081

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 5/13

1:20 pm-10:00 am

1 stop13h 40m

London Heathrow

Mon 5/18

8:55 pm-5:27 pm

2 stops27h 32m

$1,104

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 6/3

10:42 am-10:40 am

2 stops16h 58m

London Heathrow

Wed 6/10

8:00 am-9:47 pm

2 stops20h 47m

$1,209

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Wed 5/20

2:33 pm-8:35 am

2 stops35h 02m

London Heathrow

Tue 5/26

9:30 am-11:29 am

2 stops32h 59m

$1,264
Cheapest one-way
Quickest one-way

KalispellLondon

FCA - LHR

FCALHR

Kalispell Glacier Park

Thu 4/30

1:43 pm-12:15 pm

2 stops15h 32m

$663

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/22

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 April.
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 April 24, 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
9,643 reviews

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,643 reviews
United Airlines
7.4
Good
9,643 reviews

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

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, Delta, and KLM can get you from Kalispell to London Heathrow Airport in just under 15h 05m. Your travel time can differ by up to 5h 26m. 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
Ilford
Hounslow
Winchester
Croydon
Gatwick
Southend-on-Sea
Harrow
Eastleigh
Dartford
Dover
Orpington
Watford
Northampton
Borehamwood
Broadway
Chipping Norton
Hayes
Kingston upon Thames
Eastbourne
Slough

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.
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 April 24, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$733Average$954FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.