The cheapest times to fly from MSO to STL are
- January 8th to February 4th
- May 21st to July 1st
- August 13th to November 18th
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from MSO to STL is late October to early November. Prices can be as high as $953 for Sunday flights during early to mid March, or as low as $294 for Wednesday flights around late October to early November.
When to Fly to St. Louis
Flying from Missoula, MT (MSO) to St. Louis, MO (STL) will usually cost between $303 to $593 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late October to early November with an average ticket price of $339. Due to high demand the most expensive time to fly is early to mid March, with an average price of $594. Planning your trip to low-cost times can easily save you $255 on economy flights and even more on first-class flights. Generally, any price below $438 can be considered a good price for a round-trip MSO to STL flight.
See below for a graph of average weekly prices for the MSO to STL route. All prices are for round-trip tickets in USD.
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Compared to other flights, the MSO to STL flight is much cheaper than the average and costs less than the average flight leaving from Missoula. The average price per mile (for a direct flight) is $0.21, which is below average.
Flight Prices by Day of the Week
Wednesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $137 (27%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Wednesday and returning a week later will cost an average of $366. Return trip prices are from the STL to MSO flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
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Return Trip Prices by Day
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Nonstop Flights and Layovers
Travelers looking to fly from MSO to STL can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 3 hour 22 minutes may not be realistic.
Flight Questions Answered
Still have questions about flying from MSO to STL? We’ve got answers.
Which airlines fly this route?
You can find 5 major airlines flying this route most often: Alaska, American, Delta, Frontier, United, and potentially more during busy seasons.
How far away is it from St Louis Lambert International Airport to Missoula International Airport?
The distance between the two airports is roughly 1321 miles or 2126 kilometers.
How long does it take to fly from MSO to STL?
The real-world flight time for a nonstop MSO to STL flight is about 3 hour 22 minutes.
How many flights go between Missoula, MT and St. Louis, MO?
It depends on the day of the week and the date, but a typical day might have around 59 available flights from MSO to STL.
Airport Location Info
Departing Airport
Origination code | MSO |
Origination airport name | Missoula International Airport |
City | Missoula, MT |
Country | the United States |
Latitude | 46.9 |
Longitude | -114.1 |
Return Airport
Destination code | STL |
Destination airport name | St Louis Lambert International Airport |
City | St. Louis, MO |
Country | the United States |
Latitude | 38.7 |
Longitude | -90.4 |
Other Resources
Flights to STL
Flights from STL
Popular Flights
Flights to MSO
Flights from MSO
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.