MSO - STL

$387 Find Cheap Flights from Missoula to St. Louis

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Missoula to St. Louis departing on 10/14. 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

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Missoula to St. Louis, 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 Missoula to St. Louis, as well as popular online travel agencies
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Flight Deals

Cheap Flights from Missoula to St. Louis (MSO-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Missoula to St. Louis 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 Missoula to St. Louis

Tue, Oct 14 - Fri, Oct 31
Multiple Airlines Logo
2:07 pm - 12:03 amMSO-STL
8h 56m1 stop
Multiple Airlines Logo
7:00 am - 3:24 pmSTL-MSO
9h 24m1 stop
$387Multiple Airlines
Find Deal
Tue, Oct 14 - Fri, Oct 31
United Airlines Logo
2:33 pm - 8:46 pmMSO-STL
5h 13m1 stop
United Airlines Logo
9:00 am - 1:33 pmSTL-MSO
5h 33m1 stop
$390United Airlines
Find Deal
Mon, Sep 29 - Fri, Oct 3
Multiple Airlines Logo
10:10 pm - 9:06 amMSO-STL
9h 56m2 stops
Multiple Airlines Logo
2:38 pm - 9:36 pmSTL-MSO
7h 58m1 stop
$397Multiple Airlines
Find Deal
Mon, Oct 13 - Fri, Oct 31
Multiple Airlines Logo
9:04 pm - 9:07 amMSO-STL
11h 03m2 stops
Multiple Airlines Logo
2:42 pm - 9:36 pmSTL-MSO
7h 54m1 stop
$403Multiple Airlines
Find Deal
Mon, Oct 13 - Thu, Oct 30
Delta Logo
6:20 pm - 12:24 amMSO-STL
5h 04m1 stop
Delta Logo
6:50 am - 12:27 pmSTL-MSO
6h 37m1 stop
$415Delta
Find Deal
Mon, Oct 13 - Wed, Oct 29
Delta Logo
6:20 pm - 12:24 amMSO-STL
5h 04m1 stop
Delta Logo
7:30 pm - 12:17 amSTL-MSO
5h 47m1 stop
$417Delta
Find Deal
Tue, Oct 14 - Tue, Oct 28
Alaska Airlines Logo
4:12 pm - 12:03 amMSO-STL
6h 51m1 stop
Alaska Airlines Logo
7:00 am - 3:24 pmSTL-MSO
9h 24m1 stop
$429Alaska Airlines
Find Deal
Tue, Oct 14 - Tue, Oct 28
Alaska Airlines Logo
8:30 am - 12:03 amMSO-STL
14h 33m2 stops
Alaska Airlines Logo
7:00 am - 3:24 pmSTL-MSO
9h 24m1 stop
$438Alaska Airlines
Find Deal
Wed, Oct 15 - Mon, Nov 3
American Airlines Logo
1:31 pm - 10:34 pmMSO-STL
8h 03m1 stop
American Airlines Logo
2:17 pm - 8:06 pmSTL-MSO
30h 49m2 stops
$634American Airlines
Find Deal
Wed, Oct 15 - Tue, Oct 28
American Airlines Logo
1:31 pm - 10:24 amMSO-STL
19h 53m2 stops
American Airlines Logo
2:15 pm - 1:01 pmSTL-MSO
23h 46m2 stops
$676American Airlines
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $390 (round-trip)
Alaska Airlines
Best reviews • 8.0 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Cheapest round-trip
$387
Multiple Airlines
Tue 10/14Fri 10/31
MSO - STL • 1 stop
Cheapest one-way
Multiple Airlines
Tue 9/16
MSO - STL • multi-stop
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to St. Louis!
Booking Insights

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

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

What’s the cheapest day of the week to fly from Missoula to St. Louis?

The average price of all round-trip flights from Missoula to St. Louis clicked on KAYAK for each day over the last 12 months.

For Missoula to St. Louis, Wednesday is the cheapest day to fly on average and Sunday is the most expensive. Flying from St. Louis back to Missoula, the best deals are generally found on Tuesday, with Sunday being the most expensive.

Good to know

Low seasonApril
Cheapest flight$387
Best time to beat the crowds with an average 27% drop in price.
Most popular time to fly with an average 8% increase in price.
Flight from Missoula to St. Louis

When to book flights from Missoula to St. Louis

Are your dates flexible? Find out the best times to travel from Missoula to St. Louis 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 Missoula to St. Louis

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

    In the last 3 days, the lowest price for a flight from Missoula to St. Louis was $387 for a round-trip ticket.

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

    No, a passport isn't needed to fly from Missoula to St. Louis. However, local authorities might ask for an official ID.

  • Which airports will I be using when flying from Missoula to St. Louis?

    When flying out of Missoula you will be using Missoula Johnson-Bell Field. You will be landing at St. Louis, also known as Lambert-St Louis.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from Missoula to St. Louis are Alaska Airlines and Delta. With an average price for the route of $384 and an overall rating of 8.0, Alaska Airlines is the most popular choice. Delta is also a great choice for the route, with an average price of $410 and an overall rating of 7.9.

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

    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 Missoula to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Missoula 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 Missoula to St. Louis?

    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 St. Louis with an airline and back to Missoula with another airline. Booking your flights between Missoula and STL 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 Missoula to St. Louis?

    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 St. Louis from Missoula up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 3 airlines serving from Missoula to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Missoula to St. Louis. 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 Missoula to St. Louis? 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.
8.0
Alaska AirlinesOverall score based on 10000 reviews
7.1Food
7.8Comfort
7.0Entertainment
8.1Boarding
8.5Crew
Airline reviews

All flights were on time. No crowded and had empty seats. All flight attendents were great.

10.0 ExcellentAnonymous, Sep 2025SEA - SAN
Read more Alaska Airlines reviews

All flights were on time. No crowded and had empty seats. All flight attendents were great.

Didn't buy food and did not use entertainment as these were not the purpose of my flight.

My flight was delayed 2 hours which led me to lose my connection. As a consequence, I had to spend hours changing flights and hotel reservations to arrange my arrival to Vancouver.

No Free Wifi and the flight was a tad late.

The plane was clean. They got us to the destination. It was very difficult to hear the announcements at the gate. The person was speaking way too quickly, and the sound system did not carry to all parts of the seating area at the gate. The flight left more than an hour late, which left many of the passengers missing connections.

Awesome. Great flight. Super nice people and I like the extra space

The first leg of the trip was excellent. Lovely flight attendants and comfortable plane. The second leg left a lot to be desired. The flight attendant was rude when I asked for a Diet Coke, the boarding required quite a long walk and the plane was crammed and uncomfortable.

Flight was delayed as it always is with Alaska airlines. Particularly to smaller airports. No AC on the plane so it was miserably hot.

Website could be better with faster access to specific flight information and boarding pass once reservation is made. Not a fan of no seat selection on line. I had to consult gate agent each time to change seats on flights with lots of open seats. This cannot possibly be cost effective for airline. On plus side, Alaska seat legroom seemed larger than American. ns

The flights left both airports on schedule. The flight from Idaho Falls to Seattle was a typical commuter trip. The flight from Seattle to Maui was not good: It was too long for a flight in a single-aisle plane and too cramped. I kept asking myself if I would ever visit Maui again if airlines continue to run this long flight like a typical short commuter flight. I am not looking forward to the trip home.

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

Delayed due to thunderstorms and no in-flight service due to rough weather — both of which are out of Delta’s control. Flight was good overall.

The flight attendants in SLC were rude. I arrived 40 minutes early to gate. Ticket said I needed check in for seat assignments and tried check in and attendants said they weren’t doing it. And proceeded to never call me to give me a ticket so when time to board I received the very last seat. Please relay to employees to do their job better..,

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

IAD with the archaic people movers is just a place to be avoided.

All of the United employees I interacted with were professional and courteous. The aircraft was clean, the food on the flight was good. No complaints here.

Armrest controller on my seat 35D and nextbooennseat 35E did not work right. Hard to press buttons to recognize and 35D had constantnpressure either upmost down somit was nearly impossible to make selections. .

I flew with my dog and had already purchased my dog’s ticket. Even that morning I had called costumer service to insure that my husband and I had seats together since the website was giving me an error when choosing our seats and the representative mentioned our dog. I showed up early to the airport and when I got to the gate and we started boarding I was help back and told that I was supposed to have a yellow tag and that I should have checked in at the counter for them to give me that tag. I was not aware of this, the representative on the phone did not say anything. Nor did I see it anywhere in the checking process online, so if you travel with a pet and are not checking in luggage, just know that you still have to go to the check in counter when arriving at the airport unless you want to be the last one to board and not have room for your carry on in the overhead bins. Other than that, I had a great experience.

Once we got in the air the pilot made up some of the time of the delay. So that was really nice.

I understand stuff happens, but plane failures are likely due to lack of maintenance. Additionally, air conditioning wasn't working, no snack/drink service, no WiFi. Fortunately, the crew was communicative and light-hearted. United grabbed another plane and we were able to get to our destination.

There was no food available for this red eye... one little waffle cookie for a 6+ hour flight... thank God I was able to sleep some

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

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

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