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

Our cheapest airline available from Missoula to St. Louis is Delta. Our recent data shows that you can find tickets from as low as $271 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $316 and $522 round-trip. These flights start at 43% lower than the current average price 3 months from now.

What are the cheapest airlines to fly from Missoula to St. Louis one-way?

One-way options have recently been found by users for as low as $145 on Delta. Other airlines that offer cheap prices include American Airlines from $251 and United Airlines from $286 one-way.

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, July can be a great choice for travel to St. Louis. Flights to St. Louis from Missoula in July are about $482 on average during July, but can be found for as low as $390.

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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Missoula-St. Louis flight deals on Cheapflights vs. eDreams >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 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 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.

$145+ Flights from Missoula to St. Louis

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1. Tell us where you want to go

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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	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$271 (Delta)
One-way from	$145 (Delta)
Popular in	March
Cheapest in	July
Average price	$473

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. 6% potential increase in price ($31 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 May 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 May 1, 2025.

Thu 6/56:20 pmMSO - STL

1 stop5h 39mDelta

Sun 6/85:45 pmSTL - MSO

1 stop7h 01mDelta

Deal found 4/30

$271

Sat 5/311:22 pmMSO - STL

1 stop8h 23mAmerican Airlines

Sat 6/75:37 amSTL - MSO

1 stop8h 27mAmerican Airlines

Deal found 4/30

$316

Thu 6/512:24 pmMSO - STL

3 stops43h 51mMultiple Airlines

Sun 6/810:10 amSTL - MSO

2 stops27h 46mMultiple Airlines

Deal found 4/30

$478

Sun 6/16:20 amMSO - STL

1 stop5h 26mUnited Airlines

Fri 6/68:10 amSTL - MSO

3 stops14h 11mUnited Airlines

Deal found 4/30

$522

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 May 1, 2025.

Thu 6/56:20 pmMSO - STL

1 stop5h 39mDelta

Sun 6/85:45 pmSTL - MSO

1 stop7h 01mDelta

Deal found 4/30

$271

Sat 5/311:22 pmMSO - STL

1 stop8h 23mAmerican Airlines

Sat 6/75:37 amSTL - MSO

1 stop8h 27mAmerican Airlines

Deal found 4/30

$316

Thu 6/512:24 pmMSO - STL

3 stops43h 51mMultiple Airlines

Sun 6/810:10 amSTL - MSO

2 stops27h 46mMultiple Airlines

Deal found 4/30

$478

Sun 6/16:20 amMSO - STL

1 stop5h 26mUnited Airlines

Fri 6/68:10 amSTL - MSO

3 stops14h 11mUnited Airlines

Deal found 4/30

$522

Last-minute flights from Missoula to St. Louis
Discover last-minute flight deals from Missoula to St. Louis. Data last updated May 1, 2025 and is based on user searches.

Thu 5/156:20 amMSO - STL

2 stops8h 27mUnited Airlines

Mon 5/199:40 amSTL - MSO

2 stops12h 39mUnited Airlines

Deal found 4/29

$598

Sat 5/311:22 pmMSO - STL

1 stop8h 23mAmerican Airlines

Sat 6/75:37 amSTL - MSO

1 stop8h 27mAmerican Airlines

Deal found 4/30

$316

Sat 5/315:40 amMSO - STL

1 stop6h 54mDelta

Sat 6/712:59 pmSTL - MSO

2 stops11h 48mDelta

Deal found 4/30

$321

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 May 1, 2025.

Mon 7/76:24 pmMSO - STL

1 stop5h 14mDelta

Deal found 4/29

$145

Fri 5/99:06 pmMSO - STL

2 stops35h 09mMultiple Airlines

Deal found 4/29

$200

Sun 6/295:38 amMSO - STL

1 stop6h 13mAmerican Airlines

Deal found 4/29

$251

Thu 5/86:20 amMSO - STL

2 stops8h 27mUnited Airlines

Deal found 4/29

$286

Sun 6/295:45 amMSO - STL

2 stops26h 33mAlaska Airlines

Deal found 4/29

$313

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 6/5

6:20 pm-12:59 am

1 stop5h 39m

Lambert-St Louis

Sun 6/8

5:45 pm-11:46 pm

1 stop7h 01m

$271

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sat 5/31

1:22 pm-10:45 pm

1 stop8h 23m

Lambert-St Louis

Sat 6/7

5:37 am-1:04 pm

1 stop8h 27m

$316

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 6/5

12:24 pm-9:15 am

3 stops43h 51m

Lambert-St Louis

Sun 6/8

10:10 am-12:56 pm

2 stops27h 46m

$478

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 6/1

6:20 am-12:46 pm

1 stop5h 26m

Lambert-St Louis

Fri 6/6

8:10 am-9:21 pm

3 stops14h 11m

$522

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Mon 7/7

6:24 pm-12:38 am

1 stop5h 14m

$145

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Fri 5/9

9:06 pm-9:15 am

2 stops35h 09m

$200

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 6/29

5:38 am-12:51 pm

1 stop6h 13m

$251

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Thu 5/8

6:20 am-3:47 pm

2 stops8h 27m

$286

MissoulaSt. Louis

MSO - STL

MSOSTL

Missoula Johnson-Bell Field

Sun 6/29

5:45 am-9:18 am

2 stops26h 33m

$313

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

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 May.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
eDreams	Price Accuracy3 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Missoula-St. Louis flight deals on Cheapflights vs. eDreams >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 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 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

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Alaska Airlines

8.0

Very good

9,968 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Delta

8.0

Very good

7,934 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

United Airlines

7.4

Good

8,696 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

American Airlines

7.2

Good

10,000 reviews

Alaska Airlines

8.0

Very good

9,968 reviews

Reviews

1 / 20

10.0

Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 Delta. Our recent data shows that you can find tickets from as low as $271 on this airline. Additional options worth looking into are American Airlines and United Airlines, starting at $316 and $522 round-trip. These flights start at 43% lower than the current average price 3 months from now.
What are the cheapest airlines to fly from Missoula to St. Louis one-way?
One-way options have recently been found by users for as low as $145 on Delta. Other airlines that offer cheap prices include American Airlines from $251 and United Airlines from $286 one-way.
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$517	FlexibilityNo cancel fee	On-time69%

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$145+ 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 7/7. 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 May 1, 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 May 1, 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 May.

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?

What are the cheapest airlines to fly from Missoula to St. Louis one-way?

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?

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Alternative routes for Missoula to St. Louis

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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 May 1, 2025.