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Cheap flights from St. Louis to Missoula (STL - MSO) from $111

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 8/6. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — MSO
May 9 — May 161
From?
To?
Thu 5/9
Thu 5/16
1 adult, Economy
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The best prices from Lambert-St Louis to Missoula Johnson-Bell Field are usually found in February or March, booked 88 days in advance, depart on a Saturday or Wednesday and return on a Wednesday

Cheap flight deals from St. Louis to Missoula

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Missoula (MSO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 4, 2024.

Popular in

July

Cheapest in

February

Round-trip from

$402

One-way from

$111
High demand for flights, 24% potential price rise
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Best time to find cheap flights, 35% potential price drop
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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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What is the cheapest day to fly round-trip from St. Louis to Missoula?

Friday is generally a great day to depart. Flying on this day could help you save up to 34%.

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

Find a great deal and save up to 156% by booking at least 23 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 $593.

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

The best pricing can be found in the month of February. Prices to Missoula from St. Louis average $506. You can even find prices in February for less than $506, as users have found deals to Missoula from as low as $314. The month of July 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 30%.

When is the cheapest time to fly from St. Louis to Missoula (STL - 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 at noon could potentially save you up to 18% on airfare.

Cheap Frontier flights from St. Louis to Missoula

Explore cheap flight options specifically provided by Frontier for the route between St. Louis and Missoula. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.
Take a look at some of the lowest-priced Frontier flights heading from St. Louis to Missoula. Come back soon if you're not finding the exact deal you're looking for.
Sat 7/1311:41 pmSTL - MSO
1 stop10h 56mFrontier
Sat 7/203:24 pmMSO - STL
1 stop22h 29mFrontier
Deal found 5/4$240
Fri 7/268:00 pmSTL - MSO
1 stop19h 24mFrontier
Sat 8/33:24 pmMSO - STL
1 stop22h 29mFrontier
Deal found 5/4$243
Wed 7/109:26 pmSTL - MSO
1 stop13h 11mFrontier
Wed 7/173:14 pmMSO - STL
1 stop22h 39mFrontier
Deal found 5/4$259
Tue 8/1310:32 pmSTL - MSO
1 stop16h 52mFrontier
Fri 8/233:14 pmMSO - STL
1 stop17h 23mFrontier
Deal found 5/4$276

Cheap American Airlines flights from St. Louis to Missoula

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Missoula. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.
To aid your search, here are some of the cheapest American Airlines flights we've found from St. Louis to Missoula. Deals are refreshing constantly so come back soon for more options.
Wed 6/126:00 amSTL - MSO
2 stops16h 13mAmerican Airlines
Tue 6/186:55 amMSO - STL
2 stops14h 07mAmerican Airlines
Deal found 5/3$344
Wed 6/56:00 amSTL - MSO
2 stops16h 13mAmerican Airlines
Sat 6/151:46 pmMSO - STL
1 stop8h 11mAmerican Airlines
Deal found 5/3$385
Wed 6/125:27 amSTL - MSO
1 stop8h 29mAmerican Airlines
Tue 6/181:46 pmMSO - STL
1 stop8h 11mAmerican Airlines
Deal found 5/3$426
Tue 9/34:22 pmSTL - MSO
1 stop21h 05mAmerican Airlines
Tue 9/173:00 pmMSO - STL
2 stops18h 15mAmerican Airlines
Deal found 5/4$460
Sat 7/136:04 amSTL - MSO
2 stops16h 15mAmerican Airlines
Sat 7/202:35 pmMSO - STL
1 stop7h 32mAmerican Airlines
Deal found 5/4$523
Wed 7/106:04 amSTL - MSO
2 stops16h 15mAmerican Airlines
Wed 7/177:00 amMSO - STL
2 stops13h 54mAmerican Airlines
Deal found 5/4$578

Cheap St. Louis to Missoula flights in May & June 2024

Find cheap flight options from St. Louis to Missoula specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,795,183 searches. Prices were last updated on May 4, 2024.
Scroll through some of the best deals on flights from St. Louis to Missoula in 2024. Check back in a little while for more flight options.
Wed 6/126:00 amSTL - MSO
2 stops16h 13mAmerican Airlines
Tue 6/186:55 amMSO - STL
2 stops14h 07mAmerican Airlines
Deal found 5/3$344
Wed 6/56:00 amSTL - MSO
2 stops16h 13mAmerican Airlines
Sat 6/151:46 pmMSO - STL
1 stop8h 11mAmerican Airlines
Deal found 5/3$385
Wed 6/125:27 amSTL - MSO
1 stop8h 29mAmerican Airlines
Tue 6/181:46 pmMSO - STL
1 stop8h 11mAmerican Airlines
Deal found 5/3$426
Wed 6/122:16 pmSTL - MSO
2 stops10h 32mDelta
Tue 6/185:50 amMSO - STL
1 stop7h 43mDelta
Deal found 5/4$431
Mon 5/277:00 amSTL - MSO
1 stop7h 51mAlaska Airlines
Wed 5/296:00 amMSO - STL
1 stop16h 59mAlaska Airlines
Deal found 5/4$435
Wed 6/53:05 pmSTL - MSO
2 stops10h 17mDelta
Sat 6/156:18 pmMSO - STL
2 stops13h 57mDelta
Deal found 5/3$436
Mon 5/277:00 amSTL - MSO
1 stop7h 51mAlaska Airlines
Wed 5/295:31 pmMSO - STL
2 stops19h 05mAlaska Airlines
Deal found 5/4$452
Wed 6/122:16 pmSTL - MSO
2 stops11h 12mDelta
Tue 6/1811:40 amMSO - STL
2 stops7h 57mDelta
Deal found 5/4$472
Mon 5/277:00 amSTL - MSO
2 stops34h 51mAlaska Airlines
Wed 5/295:31 pmMSO - STL
2 stops19h 05mAlaska Airlines
Deal found 5/4$577

St. Louis to Missoula 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Missoula in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.
Scroll through some of the best deals on flights from St. Louis to Missoula in 2024. Check back in a little while for more flight options.
Sat 7/1311:41 pmSTL - MSO
1 stop10h 56mFrontier
Sat 7/203:24 pmMSO - STL
1 stop22h 29mFrontier
Deal found 5/4$240
Fri 7/268:00 pmSTL - MSO
1 stop19h 24mFrontier
Sat 8/33:24 pmMSO - STL
1 stop22h 29mFrontier
Deal found 5/4$243
Wed 7/109:26 pmSTL - MSO
1 stop13h 11mFrontier
Wed 7/173:14 pmMSO - STL
1 stop22h 39mFrontier
Deal found 5/4$259
Tue 8/1310:32 pmSTL - MSO
1 stop16h 52mFrontier
Fri 8/233:14 pmMSO - STL
1 stop17h 23mFrontier
Deal found 5/4$276
Wed 6/126:00 amSTL - MSO
2 stops16h 13mAmerican Airlines
Tue 6/186:55 amMSO - STL
2 stops14h 07mAmerican Airlines
Deal found 5/3$344
Wed 6/56:00 amSTL - MSO
2 stops16h 13mAmerican Airlines
Sat 6/151:46 pmMSO - STL
1 stop8h 11mAmerican Airlines
Deal found 5/3$385
Wed 6/125:27 amSTL - MSO
1 stop8h 29mAmerican Airlines
Tue 6/181:46 pmMSO - STL
1 stop8h 11mAmerican Airlines
Deal found 5/3$426
Wed 6/122:16 pmSTL - MSO
2 stops10h 32mDelta
Tue 6/185:50 amMSO - STL
1 stop7h 43mDelta
Deal found 5/4$431
Mon 5/277:00 amSTL - MSO
1 stop7h 51mAlaska Airlines
Wed 5/296:00 amMSO - STL
1 stop16h 59mAlaska Airlines
Deal found 5/4$435

One-way flights to Missoula from St. Louis

Search for one-way flight options from St. Louis to Missoula. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.
Users traveling one-way from St. Louis to Missoula can select one of these great deals. Users can also find round-trip St. Louis to Missoula flights by using the search form above.
Tue 8/610:32 pmSTL - MSO
1 stop16h 52mFrontier
Deal found 5/4$111
Tue 8/65:30 pmSTL - MSO
2 stops17h 17mUnited Airlines
Deal found 5/4$228
Tue 8/65:03 pmSTL - MSO
3 stops24h 17mUnited Airlines
Deal found 5/4$512

Find flights from St. Louis to Missoula within your budget

Customize your flight search to find flights from St. Louis to Missoula that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$240 - $485

Route

Depart

Return

Price

Lambert-St LouisMissoula Johnson-Bell Field

STL - MSO

STLMSO

Lambert-St Louis

Sat 7/13

1 stop10h 56m

Missoula Johnson-Bell Field

Sat 7/20

1 stop22h 29m

$240

Lambert-St LouisMissoula Johnson-Bell Field

STL - MSO

STLMSO

Lambert-St Louis

Fri 7/26

1 stop19h 24m

Missoula Johnson-Bell Field

Sat 8/3

1 stop22h 29m

$243

Lambert-St LouisMissoula Johnson-Bell Field

STL - MSO

STLMSO

Lambert-St Louis

Wed 7/10

1 stop13h 11m

Missoula Johnson-Bell Field

Wed 7/17

1 stop22h 39m

$259

Lambert-St LouisMissoula Johnson-Bell Field

STL - MSO

STLMSO

Lambert-St Louis

Tue 8/13

1 stop16h 52m

Missoula Johnson-Bell Field

Fri 8/23

1 stop17h 23m

$276

Lambert-St LouisMissoula Johnson-Bell Field

STL - MSO

STLMSO

Lambert-St Louis

Wed 6/12

2 stops16h 13m

Missoula Johnson-Bell Field

Tue 6/18

2 stops14h 07m

$344

Lambert-St LouisMissoula Johnson-Bell Field

STL - MSO

STLMSO

Lambert-St Louis

Wed 6/5

2 stops16h 13m

Missoula Johnson-Bell Field

Sat 6/15

1 stop8h 11m

$385

Lambert-St LouisMissoula Johnson-Bell Field

STL - MSO

STLMSO

Lambert-St Louis

Wed 6/12

2 stops10h 32m

Missoula Johnson-Bell Field

Tue 6/18

1 stop7h 43m

$431

Lambert-St LouisMissoula Johnson-Bell Field

STL - MSO

STLMSO

Lambert-St Louis

Mon 5/27

1 stop7h 51m

Missoula Johnson-Bell Field

Wed 5/29

1 stop16h 59m

$435

Lambert-St LouisMissoula Johnson-Bell Field

STL - MSO

STLMSO

Lambert-St Louis

Tue 9/3

2 stops11h 22m

Missoula Johnson-Bell Field

Tue 9/17

2 stops21h 44m

$485

Flights are sorted by cheapest first

Deals found on 5/4

When is the best time to 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 May 3, 2024.
The best time to book flights from St. Louis to Missoula is 88 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.
Search Deals

When is the cheapest time to fly from St. Louis to Missoula?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Missoula. Price data was last updated on April 28, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Missoula flight should consider departing on Wednesday afternoons 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.
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Average price of flights to Missoula by month

Plan your trip from St. Louis to Missoula by taking into account the cheapest months to travel. The average price of a one-way flight from St. Louis to Missoula is currently $284 while a round-trip flight costs $344. Price data was last updated on April 28, 2024.

Currently, January is the cheapest month in which you can book a flight from St. Louis to Missoula (average of $402). Flying from St. Louis to Missoula in June is currently the most expensive (average of $568). 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.

January

$402

February

$445

March

$525

April

$518

May

$523

June

$568

July

$556

August

$487

September

$488

October

$482

November

$486

December

$488

Temperature and rainfall in Missoula by month

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

MSO

Temperature

24.8 - 68 °F

Reviews of airlines servicing Missoula

Get insights into the airlines that provide service to Missoula. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Missoula. Reviews last updated May 4, 2024.
See what other customers who have flown with Frontier, American Airlines and Delta from St. Louis to Missoula have to say. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.1
Very good
9,137 reviews
Check prices

Boarding

8.2

Entertainment

7.3

Comfort

7.9

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Alaska Airlines
8.1
Very good
9,137 reviews
Alaska Airlines
8.1
Very good
9,137 reviews
Check prices

Boarding

8.2

Entertainment

7.3

Comfort

7.9

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Delta
8.1
Very good
10,838 reviews
Alaska Airlines
8.1
Very good
9,137 reviews
Check prices

Boarding

8.2

Entertainment

7.3

Comfort

7.9

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

United Airlines
7.4
Good
11,125 reviews
Alaska Airlines
8.1
Very good
9,137 reviews
Check prices

Boarding

8.2

Entertainment

7.3

Comfort

7.9

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

American Airlines
7.3
Good
14,728 reviews
Alaska Airlines
8.1
Very good
9,137 reviews
Check prices

Boarding

8.2

Entertainment

7.3

Comfort

7.9

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

Frontier
6.3
Okay
4,098 reviews
Alaska Airlines
8.1
Very good
9,137 reviews
Check prices

Boarding

8.2

Entertainment

7.3

Comfort

7.9

Food

7.3

Overall

8.1

Crew

8.6

Reviews

1 / 10

Paid a lot for our exit row seats and they weren’t that roomy.

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.

  • Can I find flights from St. Louis to Missoula for under $300 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Missoula for under $300. The cheapest flight booked recently is on Frontier for just $240, but on average you can expect to pay $403.

  • 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 $240. Other airlines that can offer you cheap pricing are American Airlines, from $344, and Delta, from $431. These flights start at 52% lower than the current average price 3 months from now.

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

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

  • What does STL to MSO mean?

    Lambert-St Louis Airport is STL and Missoula Johnson-Bell Field Airport is MSO. These codes are created by the International Air Transport Association (IATA) and airlines use them to identify the departing and arrival airports in the flight routes they service.

  • Can I find deals for flights from St. Louis to Missoula that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Missoula flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Missoula with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Missoula flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • 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.

  • Can I find deals for flights from St. Louis to Missoula that allow pets onboard?

    Many airlines flying from St. Louis to Missoula offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Missoula?

    Yes, you can often find last-minute deals on St. Louis to Missoula flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Missoula flight deals updated?

    The St. Louis to Missoula flight deals you see on this page were last updated on 5/4.

See more FAQs

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Alternative routes for St. Louis to Missoula
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Top 3 airlines flying from St. Louis to Missoula

Discover the top 3 airlines that operate flights from St. Louis to Missoula. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,795,183 searches. Data last updated May 4, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$316Average$482FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$369Average$613FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$512Average$597FlexibilityNo cancel feeOn-time71%
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Search flights from St. Louis to Missoula by cabin class

Find flights from St. Louis to Missoula, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from St. Louis to Missoula?

Cheapflights makes it easy to find St. Louis to Missoula flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Missoula?

Cheapflights helps you find that perfect flight to Missoula from St. Louis by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from St. Louis to Missoula with no change fees?

Yes, we can. To see specific flights from St. Louis to Missoula with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from St. Louis to Missoula become cheaper?

Yes, Cheapflights offers price alerts on St. Louis to Missoula flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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