MSO - STL

$353 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 1/21. 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 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
Travelers love KAYAK
41 299 237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$353
Typical prices: $274-$370
Alaska Airlines
Wed 1/21Sat 1/24
MSO - STL • 1 stop
Cheapest one-way
Multiple Airlines
Tue 12/16
MSO - STL • multi-stop
Top airlines
Alaska Airlines
Cheapest • from $353 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+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 St. Louis!
Flight Deals
Booking Insights
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

Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
6:23 am - 1:54 pm
MSO
-
STL
6h 31m1 stop
Alaska Airlines Logo
6:19 pm - 1:23 pm
STL
-
MSO
20h 04m2 stops
$353Alaska Airlines
Thu, Jan 22 - Sun, Jan 25
Delta Logo
1:25 pm - 9:38 pm
MSO
-
STL
7h 13m1 stop
Delta Logo
6:40 am - 12:30 pm
STL
-
MSO
6h 50m1 stop
$371Delta
Thu, Jan 22 - Sun, Jan 25
Delta Logo
1:25 pm - 11:25 pm
MSO
-
STL
9h 00m2 stops
Delta Logo
6:40 am - 12:30 pm
STL
-
MSO
6h 50m1 stop
$376Delta
Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
6:23 am - 1:54 pm
MSO
-
STL
6h 31m1 stop
Alaska Airlines Logo
6:19 pm - 1:23 pm
STL
-
MSO
20h 04m2 stops
$383Alaska Airlines
Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
6:23 am - 1:54 pm
MSO
-
STL
6h 31m1 stop
Alaska Airlines Logo
6:19 pm - 12:23 pm
STL
-
MSO
19h 04m1 stop
$387Alaska Airlines
Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
6:23 am - 1:54 pm
MSO
-
STL
6h 31m1 stop
Alaska Airlines Logo
6:19 pm - 12:23 pm
STL
-
MSO
19h 04m1 stop
$397Alaska Airlines
Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
1:03 pm - 1:54 pm
MSO
-
STL
23h 51m2 stops
Alaska Airlines Logo
6:19 pm - 1:23 pm
STL
-
MSO
20h 04m2 stops
$424Alaska Airlines
Thu, Jan 22 - Sun, Jan 25
Delta Logo
7:55 am - 8:43 pm
MSO
-
STL
11h 48m2 stops
Delta Logo
9:59 am - 8:14 pm
STL
-
MSO
11h 15m2 stops
$435Delta
Wed, Jan 21 - Sat, Jan 24
United Airlines Logo
6:00 am - 7:27 pm
MSO
-
STL
12h 27m2 stops
United Airlines Logo
9:57 am - 9:51 pm
STL
-
MSO
12h 54m2 stops
$443United Airlines
Thu, Jan 22 - Sun, Jan 25
United Airlines Logo
6:00 am - 4:03 pm
MSO
-
STL
9h 03m2 stops
United Airlines Logo
6:30 am - 4:02 pm
STL
-
MSO
10h 32m2 stops
$461United Airlines
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.

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

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

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

Cheapest flight$353
Most popular time to fly with an average 4% 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 $353 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?

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

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

    The two airlines most popular with KAYAK users for flights from Missoula to St. Louis are Delta and United Airlines. With an average price for the route of $415 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $473 and an overall rating of 7.4.

  • 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 airlines flying 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.
7.9
DeltaOverall score based on 8010 reviews
7.3Food
7.9Comfort
8.1Boarding
7.9Entertainment
8.5Crew
Airline reviews

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

10.0 ExcellentMargaret, Dec 2025
BOS - PIT
Read more Delta reviews

I noticed that the planes seem to be outdated. There was no entertainment per se. Also, the waiting area did not have any working electrical outlets

Original flight was cancelled and when i was rebooked by the airline, they couldn't seat me in the same type of seat as I had originally booked (went from window/aisle to middle/middle and one was a bulkhead seat, and other wasn't in the same class)

Lady Pilot was perfect in every way wheels up to wheels down communication, professionalism, excellent on time departure and on time arrival, excellent communication! Fantastic job with Superb attitude!!

The food is terrible. The staff is wonderful. Comfort is good.

Left on time, a bit delayed due to headwinds most of the trip.

I fly Delta all the time, have Platinum Medallion status. But this route seems to have major problems with delays and seems to never leave on time! Have only taken it twice in the last two weeks, and each time it had delays of more than 1 hour... very disappointed!!!!

Good seats in Main cabin, excellent service and excellent landing

My flight was cancelled with no explanation after I had already cleared security. I was given 4 options to rebook, only one being non-stop like I had paid for. I grabbed it. It was 4 plus hours later and then took off even later. Biggest complaint is that I booked early and had an aisle seat. They gave me a "window" seat in front of the exit row, so the seat did not decline. I weigh all of 103 #s and it was tight for me! For what I paid, I feel I was kind of ripped off. I think they should have given me the empty comfort seat for the inconvenience. There was no apology nor any explanation as to why the flight was cancelled. My guess is it benefitted Delta in some way.

Very smooth, on-time, and pleasantly uneventful flight. The team at the gate and on board were professional and genuinely courteous. The pilot kept us well updated throughout, and both takeoff and landing were steady and enjoyable without any drama. Just a good, solid flight. Thank you! 💗

Staff was exceptional! Everyone was kind, professional and friendly making the trip very pleasant. Thank you!

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

United have really come back. Airport and boarding process is clear and good, app and information also very good

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very bad! They kept delaying my flight and wouldn’t do anything about it

They brought an empty plane to the gate. Then a flight delay was announced for maintenance and waiting on a part. I was then put on a flight to San Francisco instead with a connecting flight to my final destination. Arrived at my final destination 2 hours late.

The only downside was my cell phone charger wouldn’t work in the charging port but everyone else’s would work in them all. My cell phone cable works fine in my hotel room in Frankfurt.

Flight team stood out for perzonal attention, kindness at bright cheery attitudes at 8am. Very helpful.

Ot was overall fine. Left on time and had basic snacks. Weather was finicky but that’s not the airlines fault.

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

Information on your arrival and departure airports