What are the cheapest airlines flying from St. Louis to Kalispell round-trip?

Currently priced at $262, Delta will fly you from St. Louis to Kalispell and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and United Airlines - these airlines can fly you to your destination from $273 and $282, respectively. Delta is currently priced 46% below the average price you’ll pay for this route.

What are the cheapest airlines to fly from St. Louis to Kalispell one-way?

For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $114. Users have also found prices from $129 and $165 on Delta and United Airlines, respectively.

What is the cheapest day to fly from St. Louis to Kalispell?

Travelers seeking maximum savings on their St. Louis to Kalispell flight should consider departing on Sunday afternoons when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Kalispell ranges from 1.0 - 2.6 inches per month. June is typically the wettest month, when rainfall can reach 2.6 in. February is typically the driest time to visit Kalispell when rainfall is around 1.0 in.

If weather is an important factor for your trip to Kalispell, 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 64.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

What are the most popular airlines that fly from St. Louis to Kalispell?

When booking a flight from St. Louis to Kalispell, you may want to consider flying on American Airlines, Alaska Airlines or Delta as they are the most popular for this route.

What is the cheapest day to fly round-trip from St. Louis to Kalispell?

Users have found that leaving on a Tuesday can be a cost-effective option. It’s possible to save up to 35% on your flight compared to booking on days when demand is much higher.

How far in advance should I book a flight from St. Louis to Kalispell?

To save up to 131% on this flight, we recommend booking at least 44 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from St. Louis to Kalispell from $596 1-2 weeks out and tickets from $596 for flights departing within the next 72 hours.

What is the cheapest month to fly from St. Louis to Kalispell?

December is one of the best times of the year to fly to Kalispell from St. Louis. Prices for December average $486 per person but you can even find prices for as low as $303. The most expensive prices can be found in the month of November. Opting for a December flight can save you 39% on your journey compared to booking in November

Can I find deals for flights from St. Louis to Kalispell that include hotel bookings?

Yes. In addition to deals on St. Louis to Kalispell flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Kalispell?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Kalispell.

Can I find deals for business class flights from St. Louis to Kalispell?

Yes. Cheapflights offers flight deals from St. Louis to Kalispell by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$114+ Flights from St. Louis to Kalispell

Q: How much does it cost to fly round-trip from St. Louis to Kalispell?

Airfare is below average for this route at the moment. St. Louis to Kalispell flights typically cost between $378 and $673 in October. The cheapest round-trip price found within the last 3 days was $262 on Delta (Oct 27-Nov 3).

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Find cheap flights from St. Louis to Kalispell 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

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Cheapflights Tip: The best prices from Lambert-St Louis to Kalispell Glacier Park are usually found in December or April, booked 81 days in advance, depart on a Wednesday or Tuesday and return on a Friday

Cheap flight deals from St. Louis to Kalispell

Round-trip from	$262 (Delta)
One-way from	$114 (American Airlines)
Popular in	November
Cheapest in	December
Average price	$648

From Lambert-St Louis to Kalispell Glacier Park

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One-way flight from Lambert-St Louis to Kalispell Glacier Park

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High demand for flights, 2% potential price rise

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Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Find flight deals from St. Louis to Kalispell

Cheapest flights from St. Louis to Kalispell
Explore the most affordable flight options available from St. Louis to Kalispell. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Tue 10/288:53 amSTL - FCA

1 stop5h 54mDelta

Thu 11/62:42 pmFCA - STL

1 stop7h 20mDelta

Deal found 7/28

$257

Sun 8/177:01 amSTL - FCA

1 stop8h 38mAmerican Airlines

Wed 8/203:49 pmFCA - STL

1 stop6h 25mAmerican Airlines

Deal found 7/28

$273

Mon 10/274:43 pmSTL - FCA

1 stop6h 01mUnited Airlines

Mon 11/32:38 pmFCA - STL

1 stop6h 16mUnited Airlines

Deal found 7/28

$282

Thu 10/304:14 pmSTL - FCA

1 stop8h 43mAlaska Airlines

Thu 11/66:33 amFCA - STL

1 stop7h 45mAlaska Airlines

Deal found 7/28

$290

Thu 10/166:33 amSTL - FCA

1 stop6h 49mHawaiian Airlines

Sun 10/192:37 pmFCA - STL

1 stop8h 26mHawaiian Airlines

Deal found 7/29

$334

Best flights from St. Louis to Kalispell
Discover carefully curated flight deals from St. Louis to Kalispell that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Mon 10/272:15 pmSTL - FCA

2 stops9h 54mDelta

Mon 11/36:10 pmFCA - STL

1 stop5h 14mDelta

Deal found 7/28

$262

Sun 8/177:01 amSTL - FCA

1 stop8h 38mAmerican Airlines

Wed 8/203:49 pmFCA - STL

1 stop6h 25mAmerican Airlines

Deal found 7/28

$273

Mon 10/274:43 pmSTL - FCA

1 stop6h 01mUnited Airlines

Mon 11/32:38 pmFCA - STL

1 stop6h 16mUnited Airlines

Deal found 7/28

$282

Mon 10/63:57 pmSTL - FCA

1 stop9h 01mAlaska Airlines

Fri 10/106:35 pmFCA - STL

1 stop19h 26mAlaska Airlines

Deal found 7/27

$304

Thu 10/166:33 amSTL - FCA

1 stop6h 49mHawaiian Airlines

Sun 10/192:37 pmFCA - STL

1 stop8h 26mHawaiian Airlines

Deal found 7/29

$334

Last-minute flights from St. Louis to Kalispell
Discover last-minute flight deals from St. Louis to Kalispell. Data last updated July 29, 2025 and is based on user searches.

Tue 8/57:15 pmSTL - FCA

1 stop6h 10mDelta

Wed 8/132:55 pmFCA - STL

1 stop7h 27mDelta

Deal found 7/28

$525

Tue 8/53:20 pmSTL - FCA

1 stop8h 28mUnited Airlines

Fri 8/156:20 amFCA - STL

1 stop16h 39mUnited Airlines

Deal found 7/28

$613

Tue 8/53:24 pmSTL - FCA

1 stop9h 35mAlaska Airlines

Tue 8/126:33 amFCA - STL

1 stop6h 53mAlaska Airlines

Deal found 7/28

$630

Fri 8/85:15 amSTL - FCA

1 stop6h 48mAmerican Airlines

Thu 8/144:57 pmFCA - STL

1 stop5h 54mAmerican Airlines

Deal found 7/28

$465

Fri 8/810:47 amSTL - FCA

2 stops23h 32mMultiple Airlines

Wed 8/1310:25 amFCA - STL

3 stops26h 07mMultiple Airlines

Deal found 7/27

$622

Sun 8/177:01 amSTL - FCA

1 stop8h 38mAmerican Airlines

Wed 8/203:49 pmFCA - STL

1 stop6h 25mAmerican Airlines

Deal found 7/28

$273

Sun 8/175:15 amSTL - FCA

1 stop5h 48mUnited Airlines

Wed 8/206:30 amFCA - STL

2 stops8h 14mUnited Airlines

Deal found 7/28

$464

Sun 8/172:30 pmSTL - FCA

2 stops20h 41mMultiple Airlines

Wed 8/2010:25 amFCA - STL

3 stops26h 07mMultiple Airlines

Deal found 7/28

$549

Fri 8/225:30 pmSTL - FCA

1 stop7h 23mDelta

Tue 8/265:20 amFCA - STL

1 stop7h 10mDelta

Deal found 7/29

$312

Tue 8/263:35 pmSTL - FCA

1 stop9h 24mAlaska Airlines

Wed 9/38:02 pmFCA - STL

1 stop26h 57mAlaska Airlines

Deal found 7/29

$436

One-way flights from St. Louis to Kalispell
Search for one-way flight options from St. Louis to Kalispell. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Mon 9/16:00 amSTL - FCA

1 stop7h 34mAmerican Airlines

Deal found 7/27

$114

Mon 8/185:30 pmSTL - FCA

1 stop7h 23mDelta

Deal found 7/28

$129

Sat 8/167:55 amSTL - FCA

2 stops9h 11mUnited Airlines

Deal found 7/28

$165

Wed 1/212:45 pmSTL - FCA

2 stops20h 33mAlaska Airlines

Deal found 7/26

$174

Fri 8/810:47 amSTL - FCA

2 stops23h 32mMultiple Airlines

Deal found 7/29

$285

Fly from

Fly to

Route

Depart

Return

Price

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Mon 10/27

2:15 pm-11:09 pm

2 stops9h 54m

Kalispell Glacier Park

Mon 11/3

6:10 pm-12:24 am

1 stop5h 14m

$262

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Sun 8/17

7:01 am-2:39 pm

1 stop8h 38m

Kalispell Glacier Park

Wed 8/20

3:49 pm-11:14 pm

1 stop6h 25m

$273

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Mon 10/27

4:43 pm-9:44 pm

1 stop6h 01m

Kalispell Glacier Park

Mon 11/3

2:38 pm-9:54 pm

1 stop6h 16m

$282

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Mon 10/6

3:57 pm-11:58 pm

1 stop9h 01m

Kalispell Glacier Park

Fri 10/10

6:35 pm-3:01 pm

1 stop19h 26m

$304

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Thu 10/16

6:33 am-12:22 pm

1 stop6h 49m

Kalispell Glacier Park

Sun 10/19

2:37 pm-12:03 am

1 stop8h 26m

$334

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Mon 9/1

6:00 am-12:34 pm

1 stop7h 34m

$114

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Mon 8/18

5:30 pm-11:53 pm

1 stop7h 23m

$129

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Sat 8/16

7:55 am-4:06 pm

2 stops9h 11m

$165

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Wed 1/21

2:45 pm-10:18 am

2 stops20h 33m

$174

St. LouisKalispell

STL - FCA

STLFCA

Lambert-St Louis

Fri 8/8

10:47 am-9:19 am

2 stops23h 32m

$285

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Best time to book a flight from St. Louis to Kalispell

Have a flexible travel schedule? Discover the best time to fly to Kalispell from St. Louis 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 St. Louis to Kalispell

How far ahead should I book a flight from St. Louis to Kalispell?

Booking 81 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Kalispell. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from St. Louis to Kalispell?

Currently, October is the cheapest month in which you can book a flight from St. Louis to Kalispell (average of $373). Flying from St. Louis to Kalispell in July is currently the most expensive (average of $602). 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 time of day to fly from STL to FCA?

Unlike at noon, when flights are generally more expensive, you can save up to 25% on flights from St. Louis to Kalispell by exploring options for tickets in the afternoon.

How much does it cost to fly round-trip from St. Louis to Kalispell?

Reviews of airlines servicing Kalispell

Read through reviews of airlines operating flights from St. Louis to Kalispell, such as Alaska Airlines, Delta, and Hawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Alaska Airlines

8.0

Very good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Delta

8.0

Very good

7,979 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Hawaiian Airlines

7.8

Good

2,605 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

United Airlines

7.4

Good

8,896 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

10,000 reviews

Reviews

1 / 20

10.0

Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

Related info for your journey

What are the cheapest airlines flying from St. Louis to Kalispell round-trip?
Currently priced at $262, Delta will fly you from St. Louis to Kalispell and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from American Airlines and United Airlines - these airlines can fly you to your destination from $273 and $282, respectively. Delta is currently priced 46% below the average price you’ll pay for this route.
What are the cheapest airlines to fly from St. Louis to Kalispell one-way?
For one-way options, check prices for American Airlines. According to our data, you can fly for as low as $114. Users have also found prices from $129 and $165 on Delta and United Airlines, respectively.
Can I find deals for flights from St. Louis to Kalispell that include hotel bookings?
Yes. In addition to deals on St. Louis to Kalispell flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Kalispell?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Kalispell.
Can I find deals for business class flights from St. Louis to Kalispell?
Yes. Cheapflights offers flight deals from St. Louis to Kalispell 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 St. Louis to Kalispell?
Currently, October is the cheapest month in which you can book a flight from St. Louis to Kalispell (average of $373). Flying from St. Louis to Kalispell in July is currently the most expensive (average of $602). 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

East Glacier Park

Polson

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Other flights to Kalispell

Top 4 airlines flying from St. Louis to Kalispell

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$251	Average$469	FlexibilityNo cancel fee	On-time71%
Alaska Airlines	Cheapest$257	Average$487	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$298	Average$431	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$330	Average$558	FlexibilityNo cancel fee	On-time69%

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$114+ Cheap flights from St. Louis to Kalispell (STL - FCA)

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 9/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Kalispell with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Lambert-St Louis to Kalispell Glacier Park are usually found in December or April, booked 81 days in advance, depart on a Wednesday or Tuesday and return on a Friday

Cheap flight deals from St. Louis to Kalispell

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Kalispell

Cheapest flights from St. Louis to KalispellExplore the most affordable flight options available from St. Louis to Kalispell. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Explore the most affordable flight options available from St. Louis to Kalispell. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Kalispell that are best for you.

Best time to book a flight from St. Louis to Kalispell

Have a flexible travel schedule? Discover the best time to fly to Kalispell from St. Louis with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Kalispell

How far ahead should I book a flight from St. Louis to Kalispell?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Kalispell. Price data was last updated on July 25, 2025.

What is the cheapest month to book a flight from St. Louis to Kalispell?

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

Find hourly flight availability from St. Louis to Kalispell. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 29, 2025.

How much does it cost to fly round-trip from St. Louis to Kalispell?

Reviews of airlines servicing Kalispell

Read through reviews of airlines operating flights from St. Louis to Kalispell, such as Alaska Airlines, Delta, and Hawaiian Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Kalispell. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from St. Louis to Kalispell round-trip?

What are the cheapest airlines to fly from St. Louis to Kalispell one-way?

Can I find deals for flights from St. Louis to Kalispell that include hotel bookings?

How can I find direct flights from St. Louis to Kalispell?

Can I find deals for business class flights from St. Louis to Kalispell?

What is the cheapest month to book a flight from St. Louis to Kalispell?

Traveling to a place near Kalispell?

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Alternative routes for St. Louis to Kalispell

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Top 4 airlines flying from St. Louis to Kalispell

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Cheapest flights from St. Louis to Kalispell
Explore the most affordable flight options available from St. Louis to Kalispell. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2025.