Cheap flights from St. Louis to Missoula from $176
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Missoula departing on 8/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from St. Louis to Missoula
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
American Airlines flights from St. Louis to Missoula
Our best American Airlines deals on St. Louis to Missoula flight tickets
United Airlines flights from St. Louis to Missoula
Our best United Airlines deals on St. Louis to Missoula flight tickets
See travel insights to Missoula from
How to get the cheapest flight ticket from St. Louis to Missoula
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Missoula?
The month of April is, on average, the cheapest month to fly to Missoula from St. Louis, with most prices found around $336. If you are unable to visit Missoula during the month of April, then departing from St. Louis during the month January is also very affordable. Most momondo users find prices during this month for around $384.
What is the cheapest day to depart on your flight to Missoula?
On average, the least expensive day to fly to Missoula from St. Louis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $447. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $638.
What is the cheapest airline that flies from Lambert-St Louis to Missoula Johnson-Bell Field?
American Airlines, Delta, and Alaska Airlines are the most popular carriers operating from Lambert-St Louis to Missoula Johnson-Bell Field
What airlines fly to Missoula?
United Airlines, Delta and American Airlines are the top three most popular airlines that fly to Missoula from St. Louis according to our data. United Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Missoula. Keep in mind that there are 4 different airlines that fly to Missoula on a routine basis, so you have a few additional options to choose from.
When to book flights from St. Louis to Missoula
Cheap St. Louis to Missoula (STL to MSO) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Missoula
How far is Lambert-St Louis to Missoula Johnson-Bell Field by plane?
Missoula Johnson-Bell Field is 1327.0 mi away from Lambert-St Louis. 5h 38m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport?
Prices for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport?
There are 4 operators available for flights from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport as of June 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Lambert-St Louis Airport to Missoula Johnson-Bell Field Airport.
What documentation or ID do you need to fly to Missoula Johnson-Bell Field Airport?
The travel and health documents you'll need for your trip to Missoula Johnson-Bell Field Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Missoula Johnson-Bell Field Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Missoula?
Based on momondo bookings for flights between St. Louis and Missoula, the leading airline is United Airlines, making up 36% of the total bookings. Other popular airlines include Delta with 35%, American Airlines with 18%, and Alaska Airlines with 11%.
Best airlines flying from St. Louis to Missoula
Compare and see reviews for airlines that fly from St. Louis to Missoula with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $288 | Free Cancellation | Rating 8.0 7,963 reviews | |||
| PriceFrom $294 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $325 | Free Cancellation | Rating 8.0 10,000 reviews | |||
| PriceFrom $371 | Free Cancellation | Rating 7.4 8,801 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Missoula?
Finding the right flight to Missoula from St. Louis is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Missoula quick and easy, saving you time and money.
Can I find flights from St. Louis to Missoula with flexible booking policies on momondo?
Flights from St. Louis to Missoula with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from St. Louis to Missoula?
momondo helps you find the best flight between St. Louis and Missoula by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from St. Louis to Missoula right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Missoula, momondo offers a useful price alert feature which will track prices for flights to Missoula from St. Louis and alert you when they change.