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 $294. Other airlines that can offer you cheap pricing are American Airlines, from $478, and Hawaiian Airlines, from $490. These flights start at 41% 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 $685.

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

The best pricing can be found in the month of April. Prices to Missoula from St. Louis average $498. You can even find prices in April for less than $498, as users have found deals to Missoula from as low as $336. 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 29%.

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 eDreams the most. eDreams 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.

$289+ Flights from St. Louis to Missoula

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Find cheap flights from St. Louis to Missoula with Cheapflights

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 April or January, 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	eDreams 3 stars
Round-trip from	$294 (Delta)
Popular in	December
Cheapest in	April
Average price	$336

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.

Search Deals

From Lambert-St Louis to Missoula Johnson-Bell Field

Search Deals

High demand for flights, 0% potential price rise

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($14 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 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 April 15, 2025.

Mon 7/145:30 pmSTL - MSO

1 stop7h 24mDelta

Fri 7/185:50 amMSO - STL

1 stop7h 26mDelta

Deal found 4/14

$289

Tue 9/168:26 amSTL - MSO

1 stop16h 07mAmerican Airlines

Wed 9/2412:54 pmMSO - STL

1 stop9h 55mAmerican Airlines

Deal found 4/14

$315

Mon 10/207:00 amSTL - MSO

1 stop7h 52mAlaska Airlines

Mon 10/206:30 pmMSO - STL

1 stop18h 22mAlaska Airlines

Deal found 4/14

$390

Tue 9/165:30 pmSTL - MSO

2 stops17h 30mUnited Airlines

Wed 9/242:27 pmMSO - STL

2 stops22h 52mUnited Airlines

Deal found 4/14

$466

Wed 4/306:30 amSTL - MSO

1 stop8h 28mHawaiian Airlines

Sun 5/42:54 pmMSO - STL

1 stop8h 05mHawaiian Airlines

Deal found 4/15

$490

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 April 15, 2025.

Thu 7/313:30 pmSTL - MSO

2 stops9h 54mDelta

Tue 8/55:50 amMSO - STL

1 stop4h 42mDelta

Deal found 4/15

$294

Wed 6/187:20 amSTL - MSO

1 stop17h 04mAmerican Airlines

Sun 6/225:38 amMSO - STL

1 stop6h 13mAmerican Airlines

Deal found 4/15

$478

Wed 4/306:30 amSTL - MSO

1 stop8h 28mHawaiian Airlines

Sun 5/42:54 pmMSO - STL

1 stop8h 05mHawaiian Airlines

Deal found 4/15

$490

Thu 5/1510:10 amSTL - MSO

2 stops36h 10mMultiple Airlines

Thu 5/2212:28 pmMSO - STL

3 stops43h 47mMultiple Airlines

Deal found 4/15

$499

Wed 4/309:39 amSTL - MSO

2 stops12h 56mUnited Airlines

Sun 5/46:20 amMSO - STL

2 stops8h 27mUnited Airlines

Deal found 4/15

$521

Thu 6/268:35 amSTL - MSO

2 stops16h 19mAlaska Airlines

Thu 7/36:35 amMSO - STL

2 stops10h 56mAlaska Airlines

Deal found 4/15

$620

Last-minute flights from St. Louis to Missoula
Discover last-minute flight deals from St. Louis to Missoula. Data last updated April 15, 2025 and is based on user searches.

Wed 4/306:30 amSTL - MSO

1 stop8h 28mHawaiian Airlines

Sun 5/42:54 pmMSO - STL

1 stop8h 05mHawaiian Airlines

Deal found 4/15

$490

Wed 4/3012:46 pmSTL - MSO

2 stops12h 47mDelta

Sun 5/46:15 pmMSO - STL

1 stop5h 27mDelta

Deal found 4/15

$496

Wed 4/309:39 amSTL - MSO

2 stops12h 56mUnited Airlines

Sun 5/46:20 amMSO - STL

2 stops8h 27mUnited Airlines

Deal found 4/15

$521

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

Mon 7/14

5:30 pm-11:54 pm

1 stop7h 24m

Missoula Johnson-Bell Field

Fri 7/18

5:50 am-2:16 pm

1 stop7h 26m

$289

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Wed 6/18

7:20 am-11:24 pm

1 stop17h 04m

Missoula Johnson-Bell Field

Sun 6/22

5:38 am-12:51 pm

1 stop6h 13m

$478

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Wed 4/30

6:30 am-1:58 pm

1 stop8h 28m

Missoula Johnson-Bell Field

Sun 5/4

2:54 pm-11:59 pm

1 stop8h 05m

$490

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Wed 4/30

9:39 am-9:35 pm

2 stops12h 56m

Missoula Johnson-Bell Field

Sun 5/4

6:20 am-3:47 pm

2 stops8h 27m

$521

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Thu 6/26

6:28 am-11:54 pm

2 stops18h 26m

Missoula Johnson-Bell Field

Thu 7/3

6:35 am-6:31 pm

2 stops10h 56m

$620

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/14

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 April.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 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 eDreams the most. eDreams 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 $510). 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

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Alaska Airlines

8.0

Very good

9,876 reviews

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Delta

8.0

Very good

7,917 reviews

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

Hawaiian Airlines

7.9

Good

2,374 reviews

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

United Airlines

7.4

Good

8,658 reviews

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,876 reviews

Reviews

1 / 20

4.0

Okay

Anonymous,Apr 2025

LAS - STS

flight was delayed both ways even tho the weather was clear >

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 $294. Other airlines that can offer you cheap pricing are American Airlines, from $478, and Hawaiian Airlines, from $490. These flights start at 41% 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 $510). 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

Browse thousands of different options on Cheapflights for your next trip

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Other flights to Missoula

Top 4 airlines flying from St. Louis to Missoula

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$316	Average$560	FlexibilityNo cancel fee	On-time71%
Alaska Airlines	Cheapest$325	Average$528	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$338	Average$516	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$393	Average$633	FlexibilityNo cancel fee	On-time69%

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$289+ Cheap flights from St. Louis to Missoula (STL - MSO)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/14. 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 April or January, 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

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 April 15, 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 April 15, 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 April.

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 April 11, 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 April 15, 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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Travel Smart

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 April 15, 2025.