STL - FCA

$149 Find Cheap Flights from St. Louis to Kalispell

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Kalispell departing on 8/11. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Kalispell

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Kalispell, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Kalispell, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$297
Typical prices: $423-$328
Alaska Airlines
Sat 10/24Wed 10/28
STL - FCA • 1 stop
Cheapest one-way
$149
Typical prices: $194-$329
American Airlines
Tue 8/11
STL - FCA • 1 stop
Top airlines
Cheapest • from $297 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between St. Louis and Kalispell. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $413 (round-trip)
Shortest trip • 5h 58m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 22% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 30% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Kalispell!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from St. Louis to Kalispell (STL-FCA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Kalispell that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from St. Louis to Kalispell

Sat, Oct 24 - Wed, Oct 28
Alaska Airlines Logo
6:00 am - 12:21 pm
STL
-
FCA
7h 21m
1 stop
Alaska Airlines Logo
2:03 pm - 11:59 pm
FCA
-
STL
8h 56m
1 stop
$297Alaska Airlines
Fri, Aug 21 - Wed, Sep 2
Delta Logo
8:48 am - 5:25 pm
STL
-
FCA
9h 37m
2 stops
Delta Logo
5:15 am - 1:34 pm
FCA
-
STL
7h 19m
1 stop
$302Delta
Wed, Aug 19 - Tue, Aug 25
Delta Logo
5:42 pm - 11:56 pm
STL
-
FCA
7h 14m
1 stop
Delta Logo
3:14 pm - 11:26 pm
FCA
-
STL
7h 12m
1 stop
$303Delta
Sat, Oct 24 - Wed, Oct 28
Delta Logo
12:30 pm - 11:07 pm
STL
-
FCA
11h 37m
2 stops
Delta Logo
5:25 am - 3:58 pm
FCA
-
STL
9h 33m
2 stops
$307Delta
Sun, Jun 14 - Thu, Jun 18
United Airlines Logo
5:10 am - 10:01 am
STL
-
FCA
5h 51m
1 stop
United Airlines Logo
12:35 pm - 9:30 pm
FCA
-
STL
7h 55m
1 stop
$309United Airlines
Wed, Aug 19 - Tue, Aug 25
American Airlines Logo
5:42 am - 11:36 am
STL
-
FCA
6h 54m
1 stop
American Airlines Logo
3:50 pm - 11:42 pm
FCA
-
STL
6h 52m
1 stop
$337American Airlines
Sat, Sep 19 - Sat, Sep 26
Delta Logo
3:53 pm - 8:08 pm
STL
-
FCA
5h 15m
1 stop
Delta Logo
5:20 am - 1:33 pm
FCA
-
STL
7h 13m
1 stop
$338Delta
Sun, Sep 20 - Sat, Sep 26
Delta Logo
1:55 pm - 11:42 pm
STL
-
FCA
10h 47m
2 stops
Delta Logo
5:20 am - 1:33 pm
FCA
-
STL
7h 13m
1 stop
$343Delta
Tue, Aug 11 - Wed, Aug 19
American Airlines Logo
5:42 am - 11:36 am
STL
-
FCA
6h 54m
1 stop
American Airlines Logo
4:50 pm - 12:14 am
FCA
-
STL
6h 24m
1 stop
$350American Airlines
Fri, Aug 21 - Fri, Aug 28
Delta Logo
5:42 pm - 11:56 pm
STL
-
FCA
7h 14m
1 stop
Delta Logo
6:05 pm - 12:41 am
FCA
-
STL
5h 36m
1 stop
$363Delta
Booking Insights

KAYAK's insights & trends for St. Louis to Kalispell flights

Get data-powered insights and trends into flights from St. Louis to Kalispell to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from St. Louis to Kalispell?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from St. Louis to Kalispell departing in October.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Kalispell, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from St. Louis to Kalispell is February, where tickets cost $280 (return) on average. On the other hand, the most expensive months are July and January, where the average cost of round-trip tickets is $679 and $521 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from St. Louis to Kalispell, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from St. Louis to Kalispell, you should book around 2 weeks before departure, which saves you about 22% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$149
Best time to beat the crowds with an average 31% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from St. Louis to Kalispell

When to book flights from St. Louis to Kalispell

Are your dates flexible? Find out the best times to travel from St. Louis to Kalispell based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from St. Louis to Kalispell

  • What is the cheapest flight from St. Louis to Kalispell?

    In the last 5 days, the lowest price for a flight from St. Louis to Kalispell was $149 for a one-way ticket and $297 for a round-trip.

  • Do I need a passport to fly between St. Louis and Kalispell?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which aircraft models fly most regularly from St. Louis to Kalispell?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from St. Louis to Kalispell?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between St. Louis and Kalispell, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from St. Louis to Kalispell, Delta or Alaska Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Kalispell are Delta and Alaska Airlines. With an average price for the route of $365 and an overall rating of 7.9, Delta is the most popular choice. Alaska Airlines is also a great choice for the route, with an average price of $447 and an overall rating of 7.9.

  • How does KAYAK find such low prices on flights from St. Louis to Kalispell?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Kalispell.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Kalispell?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Kalispell from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Kalispell?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Kalispell with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and FCA can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Kalispell?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Kalispell from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from St. Louis to Kalispell

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Kalispell. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Kalispell? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
Alaska AirlinesOverall score based on 12464 reviews
7.8Comfort
7.0Entertainment
8.1Boarding
8.5Crew
7.1Food
Airline reviews

Flight was delayed and we were left in the plane with planed turned off, took so long to get to destination and luggages were lost. Such a hectic travel

2.0 MediocreAnonymous, Jun 2026
DFW - SEA
Read more Alaska Airlines reviews

Flight was delayed and we were left in the plane with planed turned off, took so long to get to destination and luggages were lost. Such a hectic travel

Wish there were more complimentary drinks available - only had water and apple juice. Also - no snacks were provided during the flight, but we were offered some items as we exited the plane.

The flight was delayed out of BIL so many times that I was not able to make my connection. I was rebooked for the next day, losing a full day of my trip. I still have not been compensated as promised.

Flight was delayed, but not be a lot. Crew at the departure gate was friendly. Flight was filled with turbulence, enough to concern my husband. Snacks were delivered to rows in front of us but attendant stopped handing out snacks when she got to our row. Team was efficient but lackadaisical. Usually on board crews are more animated and friendly. No onboard entertainment and no seatback video screens for a six hour flight. Landing was a bit rough. We were told the wrong turnstile for luggage.

2 hour delay. Then some luggage was unloaded at 1baggage claim #7 then without notice the baggage claim was changed to #12. No one informed the passengers they were changing baggage claim turnstile. Several of us waited for 90 minutes after the 1st turnstile stopped and changed to other flights luggage.

Many gate changes in Seattle and mechanical problems on plane which resulted in a new gate change. Both flights, from Seattle to Detroit and Seattle to Eugene resulted in a lot of walking and tram taking.

Super impressed by staff courtesy, and assistance, Flight was one of the best I've had despite turbulence... Will definitely be flying Alaskan air as my preferred choice

No negatives. Crew was great, flight was on time and there were no crazy passengers. 🤩

My boarding passes were pulled from my Apple wallet and my 3 family members who were all sitting together in the same row all got put middle seats and were one of the last to board and barely were able to get our bags in the luggage bins.

Everything went smoothly from the transfer from Orlando to a quick board. Flight was not full and we were able to get underway a little early. My only critique is that in Orlando, they offered active duty service members and veterans to board ahead of their zones in the initial boarding process. They did not offer to veterans in San Diego. Both flights were comfortable

Definitely a southern flavor. Cordiality was evident even though no drinks or snacks were served.

On time! There were plenty of airport employees who were able to keep us moving in the right direction. The crew on the plane were professional.

Left /arrived on time. Decent seat space. Like the wifi/plugs and entertainment. Windows and tray table were kinda gross. Attendants didn't start snack service til 40mins before landing. Two rows before us, captain came on to say there's turbulence and recalled staff to seats. So, no drink/snack. Later, attendants didn't stop to see if we had trash nor even look our way. Felt invisible! Almost all pilot announcements were not only unintelligible, but so quiet. We had no idea what she said.

Average seat comfort, a drink and chips were provided, early boarding because we checked a carryon at the gate was nice. Ticket pricing shenanigans, including fees to pick a seat, check a bag, and get food onboard - evidence the industry is reinvigorating last century’s strategies- destroys the experience before one ever arrives at the airport. It’s difficult to recognize any value or sustain loyalty in the end-to-end process making air travel more drudgery than pleasure.

Gate agent was unhelpful for handicapped boarding. Flight attendant seemed untrained.

No service flight that took 5 hrs and a stop at an unscheduled airport. Crew and pilots did their jobs

Clean planes and not take my comfort class seat away.

Weather caused a long delay, but the efficiency and updates from the pilot were helpful. We were able to make our connection fortunately.

Planes were clean, no water or snacks on either flight.

Free & relatively fast Wi-Fi. Would've liked a wider drink selection.

I flew from Santa Fe to Denver to catch a flight to London and the transfer of my luggage on arrival at Denver to the London flight worked perfectly. The crew on the ground and on board for the London flight were so friendly and efficient.

Boarded early; and arrived home 40 mins early. After a long flight, it’s nice to be back home early. These flights have no amenities; no snacks. So need to bring your own

Boarded early, left early, arrived 40 mins early! A win win for me!

New plane was lovely. Crew customer service is always lax but expected. Kraft on time and arrived safely.

These airplanes should be illegal. The seats are two tight, it is a safety issue. Wheelchair support was ridiculously slow. We almost missed our flight.

It was a short flight so I was expecting too much

Horrifying Almost 2 million miles. Bring your own food and drink. One coffee or drink every three hours. Have to order meals on app more than 24 hours ahead Tiny and dirty bathrooms

Flight was delayed but more than 90 minutes. This caused me to miss my available windows for pick-up by a friend. I had to pay $125 for an uber back home from the airport which was an added expense that I had not budgeted for my trip. Staff was friendly.

Seat pitch is horrible especially on the 15 hour flight. Gate crew at SFO was Outstanding. The flight crew was also great.

Had a one hour delay due to mechanical issue. I didn’t think I’d be able to make my connecting flight, but they waited for me and greeted me when I arrived to help things run smooth.

The flight from LA to Chicago was smooth and service was very good overall.

The flight from Dallas to Tokyo was not on Japan Airlines. It was on American Airlines. Very disappointed that we did not fly on Japan Airlines. Will not be using you liars again. I’ll just book direct from the airline next time. Wish you could make this right and has us fly on Japan Air when heading back home to the US.

The Mario was so helpful and provided amazing customer service however l have being waiting for a callback for almost a week now and have not heard anything further after l informed them l wanted to change my date of traveling because of my hospital appointment even send them proof and l was unable to use manag your booking on their website is a bit frustrating and l would appreciate an update on My request as soon as possible. And have called them times without numbers no response

They made nearly everyone check their bag because the overhead bins are way too small. Extremely inconvenient

Was put into a seat right behind the toilet that had no entertainment possible but did have plenty of leg room over noisy part of plane.

Movies on my phone are great. It would be nice to have a gluten free snack option.

It was what i expected. I like the movies you can access from your phone. It would be nice if there was a gluten free snack offered. But I did bring my own snack knowing there would not be a gluten free option

The flight was peaceful, just s slight turbulence, pilots and crews were all nice and made a great job! Arrived safely in the Philippines. Thank you ya’ll!

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

American Airlines II: Delay Boogaloo. Multiple gate changes, delays, boarded and then MORE delays. I hate to say this won’t matter, but posting stuff about major corporations in 2026 is a post-modern “scream into the void.” Was multiple hours late coming home, so there you go.

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

Information on your arrival and departure airports