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Flight Deals
Cheap Flights from St. Louis to Montana
Cheapest round-trip prices found by our users on KAYAK in the last 5 daysBook Cheap St. Louis to Montana Plane Tickets
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Montana 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 Montana
Thu, Dec 3 - Sat, Dec 5
6:30 am - 10:35 amSTL Lambert-St Louis-BZN Bozeman Gallatin Field
5h 05m1 stop Denver Intl
2:15 pm - 8:25 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
5h 10m1 stop Denver Intl
$319Southwest
Thu, Nov 26 - Thu, Dec 3
5:30 am - 10:00 amSTL Lambert-St Louis-BZN Bozeman Gallatin Field
5h 30m1 stop Denver Intl
3:30 pm - 9:10 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
4h 40m1 stop Denver Intl
$319Southwest
Thu, Nov 26 - Thu, Dec 3
8:00 am - 3:16 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
8h 16m1 stop San Francisco
12:38 pm - 7:26 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
5h 48m1 stop Chicago O'Hare Intl
$319United Airlines
Mon, Nov 23 - Fri, Nov 27
5:22 pm - 11:23 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
7h 01m1 stop Minneapolis St Paul
1:39 pm - 7:31 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
4h 52m1 stop Minneapolis St Paul
$339Delta
Fri, Feb 12 - Wed, Feb 17
3:45 pm - 7:48 pmSTL Lambert-St Louis-BIL Billings Logan Intl
5h 03m1 stop Minneapolis St Paul
5:45 am - 1:23 pmBIL Billings Logan Intl-STL Lambert-St Louis
6h 38m1 stop Salt Lake City
$349Delta
Wed, Dec 16 - Mon, Dec 21
5:50 am - 1:02 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
8h 12m1 stop Dallas/Fort Worth
3:06 pm - 12:16 amBZN Bozeman Gallatin Field-STL Lambert-St Louis
8h 10m1 stop Dallas/Fort Worth
$352American Airlines
Fri, Dec 11 - Mon, Dec 14
8:40 am - 1:24 pmSTL Lambert-St Louis-BIL Billings Logan Intl
5h 44m1 stop Denver Intl
7:00 am - 12:53 pmBIL Billings Logan Intl-STL Lambert-St Louis
4h 53m1 stop Denver Intl
$355United Airlines
Fri, Nov 13 - Tue, Nov 17
5:00 am - 12:53 pmSTL Lambert-St Louis-BIL Billings Logan Intl
8h 53m1 stop Dallas/Fort Worth
1:54 pm - 11:33 pmBIL Billings Logan Intl-STL Lambert-St Louis
8h 39m1 stop Dallas/Fort Worth
$399American Airlines
Thu, Jan 7 - Mon, Jan 11
3:54 pm - 10:42 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
7h 48m1 stop Seattle/Tacoma Intl
7:06 am - 2:56 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
6h 50m1 stop Seattle/Tacoma Intl
$411Alaska Airlines
Fri, Jan 8 - Mon, Jan 11
3:54 pm - 10:42 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
7h 48m1 stop Seattle/Tacoma Intl
7:06 am - 2:56 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
6h 50m1 stop Seattle/Tacoma Intl
$411Alaska Airlines
Recent one-way flight deals from St. Louis to Montana
Sat, Jan 9
6:20 pm - 4:57 pmSTL Lambert-St Louis-MSO Missoula Johnson-Bell Field
47h 37m3 stops Denver Intl Salt Lake City Las Vegas Harry Reid Intl
$178Multiple Airlines
Wed, Nov 18
4:18 pm - 9:52 amSTL Lambert-St Louis-FCA Kalispell Glacier Park
18h 34m2 stops Denver Intl Las Vegas Harry Reid Intl
$186Multiple Airlines
Sat, Jan 9
4:30 pm - 9:52 pmSTL Lambert-St Louis-MSO Missoula Johnson-Bell Field
6h 22m1 stop Denver Intl
$190United Airlines
Sat, Jan 2
7:46 pm - 12:46 amSTL Lambert-St Louis-MSO Missoula Johnson-Bell Field
6h 00m1 stop Salt Lake City
$190Delta
Sat, Jan 9
10:21 am - 7:55 pmSTL Lambert-St Louis-MSO Missoula Johnson-Bell Field
10h 34m2 stops Atlanta Hartsfield-Jackson Minneapolis St Paul
$195Delta
Mon, Nov 16
1:08 pm - 9:51 pmSTL Lambert-St Louis-FCA Kalispell Glacier Park
9h 43m2 stops Chicago O'Hare Intl Denver Intl
$205United Airlines
Sat, Dec 19
5:25 pm - 11:15 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
6h 50m1 stop Denver Intl
$228Southwest
Fri, Nov 13
6:00 am - 12:15 pmSTL Lambert-St Louis-FCA Kalispell Glacier Park
7h 15m1 stop Seattle/Tacoma Intl
$230Alaska Airlines
Sun, Nov 15
6:00 am - 12:15 pmSTL Lambert-St Louis-FCA Kalispell Glacier Park
7h 15m1 stop Seattle/Tacoma Intl
$230Alaska Airlines
Sat, Dec 19
3:50 pm - 11:15 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
8h 25m2 stops Dallas Love Field Denver Intl
$233Southwest
Recent last minute flight deals from St. Louis to Montana
Mon, Nov 2 - Mon, Nov 9
5:00 pm - 10:51 pmSTL Lambert-St Louis-MSO Missoula Johnson-Bell Field
6h 51m1 stop Salt Lake City
6:18 pm - 12:40 amMSO Missoula Johnson-Bell Field-STL Lambert-St Louis
5h 22m1 stop Salt Lake City
$549Delta
Mon, Nov 2 - Mon, Nov 9
10:53 am - 9:47 pmSTL Lambert-St Louis-MSO Missoula Johnson-Bell Field
11h 54m2 stops Chicago O'Hare Intl Denver Intl
6:15 am - 12:38 pmMSO Missoula Johnson-Bell Field-STL Lambert-St Louis
5h 23m1 stop Denver Intl
$554United Airlines
Tue, Nov 3 - Mon, Nov 9
6:21 am - 12:23 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
7h 02m1 stop Minneapolis St Paul
5:20 am - 1:30 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
7h 10m1 stop Salt Lake City
$558Delta
Thu, Nov 5 - Sat, Nov 7
8:50 am - 3:30 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
7h 40m1 stop Denver Intl
10:40 am - 4:57 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
5h 17m1 stop Denver Intl
$559United Airlines
Tue, Nov 3 - Mon, Nov 9
2:05 pm - 9:30 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
8h 25m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl
11:05 am - 7:15 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
7h 10m1 stop Denver Intl
$563Southwest
Thu, Nov 5 - Sat, Nov 7
6:10 am - 10:25 amSTL Lambert-St Louis-BZN Bozeman Gallatin Field
5h 15m1 stop Denver Intl
8:30 am - 6:20 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
8h 50m2 stops Las Vegas Harry Reid Intl Denver Intl
$564Southwest
Tue, Nov 3 - Mon, Nov 9
2:05 pm - 9:30 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
8h 25m2 stops Phoenix Sky Harbor Intl Las Vegas Harry Reid Intl
11:05 am - 9:20 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
9h 15m2 stops Denver Intl Nashville Intl
$568Southwest
Thu, Nov 5 - Sat, Nov 7
8:35 am - 3:25 pmSTL Lambert-St Louis-BZN Bozeman Gallatin Field
7h 50m2 stops Dallas Love Field Denver Intl
8:30 am - 6:20 pmBZN Bozeman Gallatin Field-STL Lambert-St Louis
8h 50m2 stops Las Vegas Harry Reid Intl Denver Intl
$569Southwest
Mon, Nov 2 - Mon, Nov 9
12:00 pm - 10:51 pmSTL Lambert-St Louis-MSO Missoula Johnson-Bell Field
11h 51m2 stops Atlanta Hartsfield-Jackson Salt Lake City
1:19 pm - 11:22 pmMSO Missoula Johnson-Bell Field-STL Lambert-St Louis
9h 03m2 stops Salt Lake City Minneapolis St Paul
$571Delta
Booking Insights
KAYAK's insights & trends for St. Louis to Montana flights
Get data-powered insights and trends into flights from St. Louis to Montana to help you find the cheapest flights, the best time to fly and much more.
Prices
Airlines
More
What is the cheapest month to fly from St. Louis to Montana?
To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from St. Louis to Montana, 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 Montana is January, when tickets cost $326 (return) on average. On the other hand, the most expensive months are July and November, when the average cost of round-trip tickets is $641 and $507 respectively.
How far in advance should I book a flight from St. Louis to Montana?
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 Montana, 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 Montana, you should book around 2 weeks before departure, which saves you about 16% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.
Good to know
Low season | November |
|---|---|
High season | August |
Cheapest flight | $178 |
FAQs - booking Montana flights
Reviews of the top 5 airlines serving from St. Louis to Montana
See real verified KAYAK customer reviews for airlines flying from St. Louis to Montana. 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.
7.9
Alaska AirlinesOverall score based on 13135 reviews
7.0Food
7.0Entertainment
7.8Comfort
8.1Boarding
8.5Crew
Airline reviews
Much better than flight from Portland to St Louis, as it was smaller and not confusing.
10.0 ExcellentDeidre, Jun 2026
Much better than flight from Portland to St Louis, as it was smaller and not confusing.
Made our reservations 6 months ago. When we arrived at the airport we were informed they no longer have assigned seating. We were placed in the last row next to the restrooms. Our seats did not recline. I do not like the fact you are assigning seats. I don’t feel it’s fair. People who make last minute reservations sit in the middle seats. It’s did Southwest now have assigned seating and you assign seats. Even Southwest was more fair than Alaska.
We took off on time and rose into the wild blue yonder safely, and landed at our destination safely eighteen minutes early. In between we enjoyed a smooth flight and wonderful service by a great crew. Flight attendants and pilots made sure the trip was a memorable and happy experience. Can’t beat that!
There was no food or entertainment. I was in the middle seat which was uncomfortable. The flight and crew were fine.
Much better experience than at SeaTac. No one yelled….all nice The microphone was working for boarding….unlike SeaTac BIGGEST BUMMER….GOT SEATED BACK BY THE BATHROOMS AND YOU IT SMELLED THE WHOLE TRIP. A BLESSING….is they … Left the lights and air on until we were unloaded….UNLIKE SEATAC TO ST. LOUIS….THEY TURNED THE LIGHTS AND AIR OFF IN ALMOST 100 degree weather…IT SUCKED!
We were lucky to be seated in an upgraded row and received free drinks!!
I understand bottom line but..... You have to get more room in the seats. Why not give full cans for the drink service, little things go a long way. Thank you
The plane was clean. The flight crew was friendly and helpful. The flight was smooth and the pilots kept everyone informed of our status, etc. It was my first flight on Alaska Airlines and it was great. I'll be choosing them again in the future.
The crew was excellent. The seats were very good. The flight crew kept us informed about environmental items, Yellowstone eg. Passengers were on time so all times were excellent.
Crew was friendly and professional. Offered multiple drink services. Handled this full flight with style and grace.
Trash experience on all my flights this week. Delay after delay. The flight I’m waiting for has been delayed 6 times and nearly 3 hours.
Exceptional. The gate crew responded quickly and got me onto this earlier flight as the final passenger, saving me more than four hours of wait time for my reserved flight.
The flight was delayed due to earlier issues at other airports. The crew was excellent & made it a good trip.
Snacks are always pretzels. Why can't you also offer peanuts ?
Only downside was the legroom and seat width, which is always a problem unless I spend more for a premium seat.
Very good. Sad to learn Southwest is going start to charge for bags
Exceptional crew! Friendly and professional. Pleasant attitude and treated everyone with respect.
The flight was promptly on schedule and Southwest delivered everything they promised. No excuses for any shortfalls just 100% ownership of their responsibilities and business. The boarding and seating policy is a complete shambles. What started out as a great idea when Southwest first hit the market has been turned into a disaster due to the lack of integrity in many of the people who fly Southwest and take advantage of Southwest generosity at the expense of their fellow passengers.
Crew was excellent - Plane was fine. Media was good, could use more kid shows; Not a fan of the brownie brittle -- snack could be slightly better.
Left on time and arrived early. Brand new plane and no parts missing. Comfortable seats. The actual Captain spoke prior to the flight and reassured everyone about safety. Crew was so nice and fun. Perfect flight!
The flight was delayed and passengers were told that they will miss connections as flight may get 40-55 min late.
The flight was delayed and knowing I was going to miss my connection, nothing was done proactively to try and get me rebooked. It was an act of congress to do so. This is not on the crew, but on the experience itself
From checking to boarding, it was a seamless experience. The service agents were so helpful. The flight crew was so pleasant.
Great flight with Delta! Boarding was quick and easy, the amenities were solid, and the plane was in great shape. The flight attendants had a fun, lively energy while staying professional. All in all, a smooth trip — even managed to catch up on some rest. Thanks, Delta!
My flight was canceled after being rescheduled for four days canceling my trip. Kayak and everyone affiliated with it I.e the airlines, and just fly have been excruciating to deal with. My trip to visit family had to be canceled as there was no way to make it. I am furious at all of you.
They delayed our flight because of bad weather in NY which was completely understandable. Then they cancelled our flight and a later flight that evening. The earliest we could fly was the next morning. We ended up buying last minute tickets on another airline and made it home slightly delayed but safely that evening. Delta kept saying it was weather related but if that was the case how did we make it back on another airline? The weather in NY was cloudy but not bad.
The plane smelled like a sewer. Multiple passengers complained. It’s a safety and quality issue to clean these planes.
One of the best crews and best flights I’ve ever had! Really great experience
We were delayed 2 hours leaving STL. I had 20 mins from when we landed in SLC terminal A to make it to SLC terminal B. I had to actually run! thankfully I made my flight but 3/4 legs were delayed to some capacity.
The bus ride from the terminal to board the plane is uncomfortable and stressful when making a connection.
Requested for warm or hot water because of throat pain, it was denied. The entertainment system was hung, requested the crew to turn it off, instead of turning it off they rebooted the device. It was stuck again, no one bothered to check.
On boarding crew at the airport called in the boarding numbers too early meaning before the previous line was completed resulting in later numbers getting to board ahead. Also she asked those who boarded from number 3 to have the tags in their carry-on bags and leave it in the jet bridge. Most of the overhead bins were empty though. This is more work for the ground staff in addition to more inconvenience for passengers waiting to get their carry-ons from the jet bridge.
Our flight was great with an unexpected upgrade. However, four days into our travel we are still without a piece of luggage. The bag tracker has not been accurate, the airline is not communicating with me or the luggage delivery service and no one is willing to take responsibility or guarantee any kind of support or reimbursement. Unfortunately, we do not have the option to easily shop to replace items as we are currently on a cruise. I have been very disappointed by United Airlines response.
HORRIBLE, my initial flight was cancelled, they made me pay $200 extra dollars and that got cancelled as well! After 6 cancellations I decided to get a refund because I needed to get home to my babies. Out of $1000+ dollars they offered me only $40 in refund! Totally unacceptable! The flight that they cancelled I was able to fly it on another airline. I had to spend $400 on one way tickets just to get home! I’m still getting the runaround.
Sitting on the runway after we land for almost two hours! Not sure if we should blame United or Just Dumpy Vance.
Flight was delayed only slightly before takeoff due to traffic control. However, the flight arrived early to ORD. Good flight. United has been very reliable for me.
Overall a very poor experience - booked premium economy tickets but due to last minute flight delays , all my itinery went for a toss and had to fly economy class with no access to lounge or any compensation by united airlines to make up for the flight delays . i had expected better experience than that from united.
Please please take consideration when setting cabin temperature. The vents were not functional and it was over 70 degrees in the cabin during the winter months when most people are used to much cooler indoor temperatures. I was down to my white t-shirt and the sweat pants I wore from Auckland to San Francisco and was sweating profusely and there was NO VENT!
Onboarding - it would be great to see on the screen what group they were boarding. It was very confusing on who was boarding (even though they called it out) they were not clear and the space to board was strange.
Older plane. Food was really bad, almost not worth the effort. Huge difference with European based airlines.
My luggage was not sent with us. Not sure if this is Envoy Air responsibility but that was a very BAD experience
American delayed the flight for a crew rest period. The delay occurred late in the evening - the earliest i can find is 10:20 pm. With a 6 am flight anyone on the flight would have already have been asleep (unless you are insane, a vampire or on drugs) and at least for me i was already on the way to the airport at 445 am the next morning when i discovered they delayed the flight until 9 am. Given the incoming flight was in the air at 6 pm the evening before this should have been figured out a lot more timely that was there only crew to use. Just frustrating given there is no consideration for customer experience anymore in flying.
Good crew and flight was on time. It’s a small plane with limited overhead luggage space. They said the overhead space was full and I had to check my bag. There was still space when I got on. Waiting for my checked luggage added 30 minutes to my trip. Not the end of the world but also not great.
Trip delayed for 2 hours because of rain. We boarded and have to get down the flight and reboard again.
No enough space plus only allowing one laggage instead of two like other airlines.
Qatar airways ,boarding arrangements at Hamid international airport could been better
Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.
Miami lounges were overcrowded and we were unable to get in. We only had a short time. But the banks are too tight in all American hubs
Overall boarding and debarking is a joke. I dont even bring luggage anymore on trips because you can never allow them to be place then in the overhead bin or you have to pay or you check them which is even worse having to wait for your luggage on the tarmac.
First time flying internationally with AA and probably my last. Not military friendly at all. Didn't allow free checked bag for military family members (dependents) on orders like other airlines. We were charged $100 for baggage weight overage (5 lbs!)even though we had military orders allowing us extra.. Didn’t allow military members to board early. Inefficient and long wait time to board. Seats are smaller and more uncomfortable than other airlines.. no drink service for over 7 hrs of flight! After initial meal was served, the crew never offered a snack or drinks until the breakfast's was served 1 1/2 hrs before landing. Overall expensive and poor experience for the entire flight.
More options for your flight from St. Louis to Montana
Complete your trip to Montana with a hotel stay or car rental
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Cabin class types available on flights to Montana
Cabin classes available on flights to Montana. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
Flights from other airports in St. Louis to Montana
Flights from all airports in St. Louis to Montana. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
Flights to other popular destinations
The most popular flights on KAYAK according to clicks in the last 2 weeks. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.
Flights from St. Louis to popular cities in Montana
Flights from St. Louis to Billingsfrom $349
Flights from St. Louis to Bozemanfrom $352
Flights from St. Louis to Buttefrom $456
Flights from St. Louis to Codyfrom $599
Flights from St. Louis to Helenafrom $484
Flights from St. Louis to Kalispellfrom $429
Flights from St. Louis to Missoulafrom $387