What are the cheapest airlines flying from St. Louis to Missoula round-trip?

Cheapflights users have booked flights from St. Louis to Missoula round-trip from $340. Other airlines that can offer you cheap pricing are American Airlines, from $395, and Alaska Airlines, from $396. These flights start at 36% lower than the current average price 3 months from now.

What is the cheapest day to fly from St. Louis to Missoula?

Travelers seeking maximum savings on their St. Louis to Missoula flight should consider departing on Tuesday mornings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

What are the most popular airlines that fly from St. Louis to Missoula?

American Airlines, Alaska Airlines and Delta are the most popular airlines when flying from St. Louis to Missoula.

What is the cheapest day to fly round-trip from St. Louis to Missoula?

Monday is generally a great day to depart. Flying on this day could help you save up to 42%.

How far in advance should I book a flight from St. Louis to Missoula?

Find a great deal and save up to 500% by booking at least 25 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from St. Louis to Missoula within the next two weeks, with the cheapest ticket starting at $673.

What is the cheapest month to fly from St. Louis to Missoula?

The best pricing can be found in the month of January. Prices to Missoula from St. Louis average $532. You can even find prices in January for less than $532, as users have found deals to Missoula from as low as $384. The month of December appears to be one of the more expensive times to travel to Missoula from St. Louis. Flying in the targeted month can save you up to 21%.

Most accurate provider : When it comes to deals on St. Louis-Missoula flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Missoula flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Missoula flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on St. Louis-Missoula flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Missoula flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from St. Louis to Missoula that include hotel bookings?

Yes. In addition to deals on St. Louis to Missoula flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from St. Louis to Missoula?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Missoula.

Can I find deals for business class flights from St. Louis to Missoula?

Yes. Cheapflights offers flight deals from St. Louis to Missoula by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$196+ Flights from St. Louis to Missoula

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

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Cheapflights Tip: The best prices from Lambert-St Louis to Missoula Johnson-Bell Field are usually found in January or September, booked 27 days in advance, depart on a Tuesday or Friday and return on a Wednesday

Cheap flight deals from St. Louis to Missoula

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$340 (Delta)
One-way from	$196 (KAYAK)
Popular in	December
Cheapest in	January
Average price	$563

Provider with most accurate pricing for Lambert-St Louis-Missoula Johnson-Bell Field flight deals.

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Provider most trusted by Cheapflights users for Lambert-St Louis-Missoula Johnson-Bell Field flights.

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From Lambert-St Louis to Missoula Johnson-Bell Field

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One-way flight from Lambert-St Louis to Missoula Johnson-Bell Field

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High demand for flights, 4% potential price rise

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Cheapest flight prices on average. 2% potential price decrease ($11 potential savings vs. average RT price).

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Average for round-trip flights in March 2025

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Find flight deals from St. Louis to Missoula

Cheapest flights from St. Louis to Missoula
Explore the most affordable flight options available from St. Louis to Missoula. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 26, 2025.

Tue 9/96:59 pmSTL - MSO

1 stop6h 25mDelta

Tue 9/166:10 pmMSO - STL

1 stop5h 28mDelta

Deal found 3/24

$340

Mon 7/214:52 pmSTL - MSO

1 stop7h 41mAmerican Airlines

Sat 7/267:03 amMSO - STL

1 stop6h 16mAmerican Airlines

Deal found 3/25

$395

Thu 4/176:44 amSTL - MSO

1 stop7h 55mAlaska Airlines

Mon 4/216:38 pmMSO - STL

1 stop28h 21mAlaska Airlines

Deal found 3/25

$396

Thu 7/318:00 amSTL - MSO

2 stops14h 23mUnited Airlines

Tue 8/55:20 pmMSO - STL

2 stops21h 27mUnited Airlines

Deal found 3/25

$606

Best flights from St. Louis to Missoula
Discover carefully curated flight deals from St. Louis to Missoula that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated March 26, 2025.

Tue 9/96:59 pmSTL - MSO

1 stop6h 25mDelta

Tue 9/166:10 pmMSO - STL

1 stop5h 28mDelta

Deal found 3/24

$340

Mon 7/214:52 pmSTL - MSO

1 stop7h 41mAmerican Airlines

Sat 7/267:03 amMSO - STL

1 stop6h 16mAmerican Airlines

Deal found 3/25

$395

Thu 4/176:44 amSTL - MSO

1 stop7h 55mAlaska Airlines

Mon 4/216:38 pmMSO - STL

1 stop28h 21mAlaska Airlines

Deal found 3/25

$396

Thu 7/318:00 amSTL - MSO

2 stops14h 23mUnited Airlines

Tue 8/55:20 pmMSO - STL

2 stops21h 27mUnited Airlines

Deal found 3/25

$606

Last-minute flights from St. Louis to Missoula
Discover last-minute flight deals from St. Louis to Missoula. Data last updated March 26, 2025 and is based on user searches.

Tue 4/83:11 pmSTL - MSO

1 stop9h 46mHawaiian Airlines

Sat 4/122:35 pmMSO - STL

1 stop8h 24mHawaiian Airlines

Deal found 3/24

$490

Thu 4/176:44 amSTL - MSO

1 stop7h 55mAlaska Airlines

Mon 4/216:38 pmMSO - STL

1 stop28h 21mAlaska Airlines

Deal found 3/25

$396

Mon 4/217:15 pmSTL - MSO

1 stop6h 18mDelta

Wed 5/76:20 pmMSO - STL

1 stop5h 13mDelta

Deal found 3/24

$337

One-way flights from St. Louis to Missoula
Search for one-way flight options from St. Louis to Missoula. Find affordable one-way fares based on user searches. Data last updated March 26, 2025.

Fri 4/257:15 pmSTL - MSO

1 stop6h 18mDelta

Deal found 3/25

$196

Wed 4/238:48 amSTL - MSO

1 stop8h 14mUnited Airlines

Deal found 3/25

$236

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Missoula that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 9/9

6:59 pm-12:24 am

1 stop6h 25m

Missoula Johnson-Bell Field

Tue 9/16

6:10 pm-12:38 am

1 stop5h 28m

$340

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Mon 7/21

4:52 pm-11:33 pm

1 stop7h 41m

Missoula Johnson-Bell Field

Sat 7/26

7:03 am-2:19 pm

1 stop6h 16m

$395

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Thu 4/17

6:44 am-1:39 pm

1 stop7h 55m

Missoula Johnson-Bell Field

Mon 4/21

6:38 pm-11:59 pm

1 stop28h 21m

$396

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Thu 7/31

8:00 am-9:23 pm

2 stops14h 23m

Missoula Johnson-Bell Field

Tue 8/5

5:20 pm-3:47 pm

2 stops21h 27m

$606

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Fri 4/25

7:15 pm-12:33 am

1 stop6h 18m

$196

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Wed 4/23

8:48 am-4:02 pm

1 stop8h 14m

$236

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Compare providers for flights from St. Louis to Missoula

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Missoula in March.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on St. Louis-Missoula flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on St. Louis-Missoula flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from St. Louis-Missoula flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on St. Louis-Missoula flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for St. Louis-Missoula flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from St. Louis to Missoula

Have a flexible travel schedule? Discover the best time to fly to Missoula from St. Louis with our price prediction graph.

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

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

How far ahead should I book a flight from St. Louis to Missoula?

The best time to book flights from St. Louis to Missoula is 24 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to Missoula?

Currently, October is the cheapest month in which you can book a flight from St. Louis to Missoula (average of $365). Flying from St. Louis to Missoula in June is currently the most expensive (average of $517). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from STL to MSO?

One of the essential ways to save on airfare from St. Louis to Missoula is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 65% on airfare.

Rainfall in Missoula by month

In terms of precipitation, rainfall in Missoula ranges from 0.7 - 2.1 inches per month. June is typically the wettest month, when rainfall can reach 2.1 in. February is typically the driest time to visit Missoula when rainfall is around 0.7 in.

Temperature in Missoula by month

If weather is an important factor for your trip to Missoula, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 24.8 F).

Reviews of airlines servicing Missoula

Alaska Airlines

8.0

Very good

9,789 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Alaska Airlines

8.0

Very good

9,789 reviews

Alaska Airlines

8.0

Very good

9,789 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Delta

8.0

Very good

7,891 reviews

Alaska Airlines

8.0

Very good

9,789 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

United Airlines

7.4

Good

8,608 reviews

Alaska Airlines

8.0

Very good

9,789 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,789 reviews

Reviews

1 / 20

10.0

Excellent

Cheri,Jan 2025

FAT - SEA

Very friendly. I really liked that they had water for us in cartons not plastic. Impressed with Alaska Airlines, First time I had flown them

Related info for your journey

What are the cheapest airlines flying from St. Louis to Missoula round-trip?
Cheapflights users have booked flights from St. Louis to Missoula round-trip from $340. Other airlines that can offer you cheap pricing are American Airlines, from $395, and Alaska Airlines, from $396. These flights start at 36% lower than the current average price 3 months from now.
Can I find deals for flights from St. Louis to Missoula that include hotel bookings?
Yes. In addition to deals on St. Louis to Missoula flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from St. Louis to Missoula?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Missoula.
Can I find deals for business class flights from St. Louis to Missoula?
Yes. Cheapflights offers flight deals from St. Louis to Missoula by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from St. Louis to Missoula?
Currently, October is the cheapest month in which you can book a flight from St. Louis to Missoula (average of $365). Flying from St. Louis to Missoula in June is currently the most expensive (average of $517). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Other flights to Missoula

Top 4 airlines flying from St. Louis to Missoula

Airline	Cheapest	Average	Flexibility	On-time
Alaska Airlines	Cheapest$325	Average$535	FlexibilityNo cancel fee	On-time75%
American Airlines	Cheapest$328	Average$591	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$344	Average$525	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$425	Average$644	FlexibilityNo cancel fee	On-time69%

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$196+ Cheap flights from St. Louis to Missoula (STL - MSO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/25. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from St. Louis to Missoula with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Lambert-St Louis to Missoula Johnson-Bell Field are usually found in January or September, booked 27 days in advance, depart on a Tuesday or Friday and return on a Wednesday

Cheap flight deals from St. Louis to Missoula

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from St. Louis to Missoula

Cheapest flights from St. Louis to MissoulaExplore the most affordable flight options available from St. Louis to Missoula. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 26, 2025.

Explore the most affordable flight options available from St. Louis to Missoula. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 26, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from St. Louis to Missoula that are best for you.

Compare providers for flights from St. Louis to Missoula

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from St. Louis to Missoula in March.

Best time to book a flight from St. Louis to Missoula

Have a flexible travel schedule? Discover the best time to fly to Missoula from St. Louis with our price prediction graph.

Cheapflights Insights

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

How far ahead should I book a flight from St. Louis to Missoula?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Missoula. Price data was last updated on March 21, 2025.

What is the cheapest month to book a flight from St. Louis to Missoula?

What is the cheapest time of day to fly from STL to MSO?

Find hourly flight availability from St. Louis to Missoula. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 26, 2025.

Rainfall in Missoula by month

Plan your trip to Missoula by taking into account the average rainfall totals by month.

Temperature in Missoula by month

Plan your trip to Missoula by taking into account the average temperature totals by month.

Reviews of airlines servicing Missoula

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Missoula. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the cheapest airlines flying from St. Louis to Missoula round-trip?

Can I find deals for flights from St. Louis to Missoula that include hotel bookings?

How can I find direct flights from St. Louis to Missoula?

Can I find deals for business class flights from St. Louis to Missoula?

What is the cheapest month to book a flight from St. Louis to Missoula?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for St. Louis to Missoula

See prices for flight routes from nearby airports that may be better suited for you.

Top 4 airlines flying from St. Louis to Missoula

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Cheapest flights from St. Louis to Missoula
Explore the most affordable flight options available from St. Louis to Missoula. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 26, 2025.