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

Our cheapest airline available from Missoula to St. Louis is Alaska Airlines. Our recent data shows that you can find tickets from as low as $336 on this airline. Additional options worth looking into are United Airlines and Delta, starting at $342 and $413 round-trip. These flights start at 31% lower than the current average price 3 months from now.

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

Currently, August is the cheapest month in which you can book a flight from Missoula to St. Louis (average of $311). Flying from Missoula to St. Louis in March is currently the most expensive (average of $356). 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 day to fly from Missoula to St. Louis?

Travelers seeking maximum savings on their Missoula to St. Louis flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday mornings 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 Missoula to St. Louis?

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

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

Flights from Missoula to St. Louis are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to St. Louis.

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

Due to multiple factors, expect to potentially pay more when booking in March. For low rates, February can be a great choice for travel to St. Louis. Flights to St. Louis from Missoula in February are about $492 on average during February, but can be found for as low as $351.

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

Unlike in the afternoon, when flights are generally more expensive, you can save up to 6% on flights from Missoula to St. Louis by exploring options for tickets at noon.

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

Most trusted provider : When it comes to deals on Missoula-St. Louis 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 Missoula-St. Louis 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 Missoula to St. Louis that include hotel bookings?

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

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

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

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

Yes. Cheapflights offers flight deals from Missoula to St. Louis 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 Missoula to St. Louis

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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

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Missoula to St. Louis

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Round-trip from	$336 (Alaska Airlines)
One-way from	$196 (American Airlines)
Popular in	March
Cheapest in	February
Average price	$543

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

Search Deals

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

Search Deals

From Missoula Johnson-Bell Field to Lambert-St Louis

Search Deals

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

Search Deals

Highest demand for flights based on searches. 4% potential increase in price ($22 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in April 2025

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Find flight deals from Missoula to St. Louis

Cheapest flights from Missoula to St. Louis
Explore the most affordable flight options available from Missoula to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Thu 5/12:54 pmMSO - STL

1 stop8h 05mHawaiian Airlines

Tue 5/66:30 amSTL - MSO

1 stop8h 28mHawaiian Airlines

Deal found 4/10

$336

Thu 5/15:20 pmMSO - STL

1 stop5h 38mUnited Airlines

Tue 5/66:30 amSTL - MSO

2 stops8h 03mUnited Airlines

Deal found 4/10

$342

Thu 5/156:20 pmMSO - STL

1 stop5h 39mDelta

Mon 5/196:05 pmSTL - MSO

1 stop6h 42mDelta

Deal found 4/10

$413

Thu 5/16:36 pmMSO - STL

2 stops13h 25mAlaska Airlines

Tue 5/63:58 pmSTL - MSO

2 stops23h 00mAlaska Airlines

Deal found 4/10

$447

Sun 6/225:38 amMSO - STL

1 stop6h 13mAmerican Airlines

Sun 6/294:23 pmSTL - MSO

1 stop8h 01mAmerican Airlines

Deal found 4/10

$539

Best flights from Missoula to St. Louis
Discover carefully curated flight deals from Missoula to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 11, 2025.

Thu 5/12:54 pmMSO - STL

1 stop8h 05mAlaska Airlines

Tue 5/66:30 amSTL - MSO

1 stop8h 28mAlaska Airlines

Deal found 4/10

$336

Thu 5/15:20 pmMSO - STL

1 stop5h 38mUnited Airlines

Tue 5/66:30 amSTL - MSO

2 stops8h 03mUnited Airlines

Deal found 4/10

$342

Thu 5/156:20 pmMSO - STL

1 stop5h 39mDelta

Mon 5/196:05 pmSTL - MSO

1 stop6h 42mDelta

Deal found 4/10

$413

Sun 6/225:38 amMSO - STL

1 stop6h 13mAmerican Airlines

Sun 6/294:23 pmSTL - MSO

1 stop8h 01mAmerican Airlines

Deal found 4/10

$539

Last-minute flights from Missoula to St. Louis
Discover last-minute flight deals from Missoula to St. Louis. Data last updated April 11, 2025 and is based on user searches.

Fri 4/185:15 pmMSO - STL

1 stop27h 35mUnited Airlines

Tue 4/228:48 amSTL - MSO

1 stop13h 47mUnited Airlines

Deal found 4/10

$615

Thu 5/12:54 pmMSO - STL

1 stop8h 05mAlaska Airlines

Tue 5/66:30 amSTL - MSO

1 stop8h 28mAlaska Airlines

Deal found 4/10

$336

Thu 5/15:20 pmMSO - STL

1 stop5h 38mUnited Airlines

Tue 5/66:30 amSTL - MSO

2 stops8h 03mUnited Airlines

Deal found 4/10

$342

Thu 5/156:20 pmMSO - STL

1 stop5h 39mDelta

Mon 5/196:05 pmSTL - MSO

1 stop6h 42mDelta

Deal found 4/10

$413

One-way flights from Missoula to St. Louis
Search for one-way flight options from Missoula to St. Louis. Find affordable one-way fares based on user searches. Data last updated April 11, 2025.

Mon 9/151:38 pmMSO - STL

1 stop8h 21mAmerican Airlines

Deal found 4/10

$196

Mon 9/151:11 pmMSO - STL

2 stops33h 48mAlaska Airlines

Deal found 4/10

$247

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 5/1

2:54 pm-11:59 pm

1 stop8h 05m

Lambert-St Louis

Tue 5/6

6:30 am-1:58 pm

1 stop8h 28m

$336

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 5/1

5:20 pm-11:58 pm

1 stop5h 38m

Lambert-St Louis

Tue 5/6

6:30 am-1:33 pm

2 stops8h 03m

$342

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 5/15

6:20 pm-12:59 am

1 stop5h 39m

Lambert-St Louis

Mon 5/19

6:05 pm-11:47 pm

1 stop6h 42m

$413

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 5/1

6:36 pm-9:01 am

2 stops13h 25m

Lambert-St Louis

Tue 5/6

3:58 pm-1:58 pm

2 stops23h 00m

$447

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 6/22

5:38 am-12:51 pm

1 stop6h 13m

Lambert-St Louis

Sun 6/29

4:23 pm-11:24 pm

1 stop8h 01m

$539

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 9/15

1:38 pm-10:59 pm

1 stop8h 21m

$196

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 9/15

1:11 pm-11:59 pm

2 stops33h 48m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Compare providers for flights from Missoula to St. Louis

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

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

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Missoula 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 Missoula to St. Louis

Rainfall in St. Louis by month

In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.

Temperature in St. Louis by month

If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing St. Louis

Alaska Airlines

8.0

Very good

9,851 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

9,851 reviews

Alaska Airlines

8.0

Very good

9,851 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

7,911 reviews

Alaska Airlines

8.0

Very good

9,851 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

8,636 reviews

Alaska Airlines

8.0

Very good

9,851 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

9,851 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 Missoula to St. Louis round-trip?
Our cheapest airline available from Missoula to St. Louis is Alaska Airlines. Our recent data shows that you can find tickets from as low as $336 on this airline. Additional options worth looking into are United Airlines and Delta, starting at $342 and $413 round-trip. These flights start at 31% lower than the current average price 3 months from now.
Can I find deals for flights from Missoula to St. Louis that include hotel bookings?
Yes. In addition to deals on Missoula to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Missoula to St. Louis?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Missoula to St. Louis.
Can I find deals for business class flights from Missoula to St. Louis?
Yes. Cheapflights offers flight deals from Missoula to St. Louis 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 Missoula to St. Louis?
Currently, August is the cheapest month in which you can book a flight from Missoula to St. Louis (average of $311). Flying from Missoula to St. Louis in March is currently the most expensive (average of $356). 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 St. Louis

Top 3 airlines flying from Missoula to St. Louis

Airline	Cheapest	Average	Flexibility	On-time
Alaska Airlines	Cheapest$280	Average$441	FlexibilityNo cancel fee	On-time75%
Delta	Cheapest$334	Average$438	FlexibilityNo cancel fee	On-timeN/A
United Airlines	Cheapest$334	Average$533	FlexibilityNo cancel fee	On-time69%

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

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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Missoula to St. Louis with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Missoula to St. Louis

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Missoula to St. Louis

Cheapest flights from Missoula to St. LouisExplore the most affordable flight options available from Missoula to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Explore the most affordable flight options available from Missoula to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

Cheapflights Fare Finder

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

Compare providers for flights from Missoula to St. Louis

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 Missoula to St. Louis in April.

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

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

Cheapflights Insights

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

Rainfall in St. Louis by month

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

Temperature in St. Louis by month

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

Reviews of airlines servicing St. Louis

Related info for your journey

Find useful and relevant information for your journey from Missoula to St. Louis. 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 Missoula to St. Louis round-trip?

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

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

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

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

Traveling to a place near 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 Missoula to St. Louis

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

Top 3 airlines flying from Missoula to St. Louis

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Cheapest flights from Missoula to St. Louis
Explore the most affordable flight options available from Missoula to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.