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Missoula

$119+ Cheap flights from Illinois to Missoula (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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — MSO
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap flight deals from Illinois to Missoula

Cheapest flights from Illinois to Missoula
Explore the most affordable flight options available from Illinois to Missoula. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This United Airlines deal was found by Cheapflights users on 1/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/98:55 am
ORD
-
MSO
Nonstop3h 39m
United Airlines
Tue 6/3012:40 pm
MSO
-
ORD
Nonstop3h 20m
United Airlines
Deal found 1/21$249
This Alaska Airlines deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/35:29 pm
ORD
-
MSO
1 stop7h 30m
Alaska Airlines
Wed 3/41:39 pm
MSO
-
ORD
1 stop9h 17m
Alaska Airlines
Deal found 1/19$253
This Delta deal was found by Cheapflights users on 1/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/183:40 pm
STL
-
MSO
1 stop5h 21m
Delta
Wed 2/256:10 pm
MSO
-
STL
1 stop5h 15m
Delta
Deal found 1/19$257
This Alaska Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/103:35 pm
ORD
-
MSO
1 stop9h 20m
Alaska Airlines
Fri 2/206:23 am
MSO
-
ORD
1 stop9h 10m
Alaska Airlines
Deal found 1/20$269
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/101:58 pm
ORD
-
MSO
2 stops11h 30m
Delta
Fri 2/205:15 am
MSO
-
ORD
1 stop6h 04m
Delta
Deal found 1/20$274
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/63:59 pm
ORD
-
MSO
1 stop5h 03m
Delta
Thu 4/91:07 pm
MSO
-
ORD
1 stop7h 27m
Delta
Deal found 1/20$281
This United Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/295:20 am
STL
-
MSO
1 stop5h 33m
United Airlines
Wed 9/25:32 pm
MSO
-
STL
1 stop5h 11m
United Airlines
Deal found 1/20$289
This United Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/202:02 pm
ORD
-
MSO
1 stop8h 55m
United Airlines
Fri 2/272:34 pm
MSO
-
ORD
1 stop7h 18m
United Airlines
Deal found 1/20$292
This United Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/178:41 am
STL
-
MSO
1 stop5h 51m
United Airlines
Tue 2/246:15 am
MSO
-
STL
2 stops13h 08m
United Airlines
Deal found 1/20$294
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/95:00 pm
ORD
-
MSO
1 stop7h 14m
Delta
Sun 5/175:40 am
MSO
-
ORD
1 stop5h 41m
Delta
Deal found 1/20$294
This Alaska Airlines deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/135:29 pm
ORD
-
MSO
1 stop19h 52m
Alaska Airlines
Tue 3/171:39 pm
MSO
-
ORD
1 stop9h 17m
Alaska Airlines
Deal found 1/20$300
This Delta deal was found by Cheapflights users on 1/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:59 pm
STL
-
MSO
1 stop6h 25m
Delta
Tue 7/286:10 pm
MSO
-
STL
1 stop5h 26m
Delta
Deal found 1/20$314

Find flight deals from Illinois to Missoula

Keep the following information in mind while searching for Illinois to Missoula flight deals. Data was last updated January 21, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$249
(United Airlines)

One-way from

$119
(Alaska Airlines)

Popular in

December

Cheapest in

November

Average price

$331

Good round-trip deal

$331 or less
Provider with most accurate pricing for Chicago (CHI)-Missoula Johnson-Bell Field flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Missoula Johnson-Bell Field flights.
Search Deals
From Illinois to Missoula Johnson-Bell Field
Search Deals
One-way flight from Illinois to Missoula Johnson-Bell Field
Search Deals
High demand for flights, 1% potential price rise
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($17 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Illinois to Missoula Johnson-Bell Field.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois 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 2,558,603 searches. Data last updated January 21, 2026.
Use the filters below to find and compare flights from Illinois to Missoula that are best for you.

Fly from

Illinois

Fly to

Missoula

Route

Depart

Return

Price

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Tue 3/3

5:29 pm-11:59 pm

1 stop7h 30m

Missoula Johnson-Bell Field

Wed 3/4

1:39 pm-11:56 pm

1 stop9h 17m

$253

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Wed 2/18

3:40 pm-8:01 pm

1 stop5h 21m

Missoula Johnson-Bell Field

Wed 2/25

6:10 pm-12:25 am

1 stop5h 15m

$257

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 3/17

4:30 pm-9:57 pm

1 stop6h 27m

Missoula Johnson-Bell Field

Tue 3/24

2:35 pm-8:41 pm

1 stop5h 06m

$257

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 3/17

1:39 pm-12:24 am

2 stops11h 45m

Missoula Johnson-Bell Field

Tue 3/24

6:04 pm-12:21 am

1 stop5h 17m

$262

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Fri 3/13

2:01 pm-9:57 pm

1 stop8h 56m

Missoula Johnson-Bell Field

Wed 3/18

5:16 pm-11:52 pm

1 stop5h 36m

$269

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Fri 3/13

5:29 pm-11:59 pm

1 stop7h 30m

Missoula Johnson-Bell Field

Wed 3/18

4:23 pm-11:59 pm

1 stop6h 36m

$269

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Sat 2/21

12:29 pm-8:01 pm

1 stop8h 32m

Missoula Johnson-Bell Field

Wed 2/25

5:15 am-12:19 pm

1 stop6h 04m

$269

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Mon 3/2

5:29 pm-11:59 pm

1 stop7h 30m

Missoula Johnson-Bell Field

Fri 3/6

1:39 pm-11:56 pm

1 stop9h 17m

$269

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Wed 3/18

7:10 pm-12:24 am

1 stop6h 14m

Missoula Johnson-Bell Field

Mon 3/23

5:20 am-12:14 pm

1 stop5h 54m

$269

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Thu 4/16

7:20 am-12:16 pm

1 stop5h 56m

Missoula Johnson-Bell Field

Sun 4/19

5:04 am-12:25 pm

1 stop6h 21m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 52 results
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Best time to book a flight from Illinois to Missoula

Have a flexible travel schedule? Discover the best time to fly to Missoula from Illinois 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 Illinois to Missoula

What is the cheapest month to book a flight from Illinois to Missoula?

Currently, October is the cheapest month in which you can book a flight from Illinois to Missoula (average of $214). Flying from Illinois to Missoula in January is currently the most expensive (average of $398). 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 IL to MSO?

Find hourly flight availability from Illinois 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 January 21, 2026.

When flying from Illinois to Missoula, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Illinois to Missoula

Explore weekly flight availability from Illinois to Missoula. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 21, 2026.

The most flights from USIL to MSO are scheduled on a Monday (2 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (2 on average).

Related info for your journey

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

  • What airport do you fly into for flights to Missoula from Illinois?

    Missoula Johnson-Bell Field (MSO) is the airport you will fly into if you book a flight from Illinois to Missoula. It is only a 5.5 mi journey from Johnson-Bell Field (MSO) to Missoula’s city center.

  • How long is the flight from Illinois to Missoula?

    Airlines like Alaska Airlines, Delta, and United Airlines fly from Illinois to Missoula in about 5h 21m. The time it takes to get you to your destination can typically vary by up to 2h 09m. There are 1320 mi between Illinois and Missoula. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to Missoula one-way?

    $111 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on Alaska Airlines and American Airlines, with prices starting from $134 and $161, respectively.

  • What are the most popular routes from Illinois to Missoula?

    The most popular flight routes from Illinois to Missoula are Chicago O'Hare Intl - Missoula Johnson-Bell Field, Chicago Midway - Missoula Johnson-Bell Field and Lambert-St Louis - Missoula Johnson-Bell Field.

  • What are the most reliable airlines from Illinois to Missoula?

    No one likes to see their flight delayed. When booking a flight from Illinois to Missoula consider choosing American Airlines (57%), Alaska Airlines (57%) or Envoy Air (57%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Illinois to Missoula?

    The cheapest flight price from Illinois to Missoula is $286. On average you can expect to pay $411. The most popular route, (Chicago O'Hare Intl - Missoula Johnson-Bell Field), can usually be booked for $269.

  • Can I find deals for flights from Illinois to Missoula that include hotel bookings?

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

  • How can I find direct flights from Illinois to Missoula?

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

  • Can I find deals for business class flights from Illinois to Missoula?

    Yes. Cheapflights offers flight deals from Illinois 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 Illinois to Missoula?

    Currently, October is the cheapest month in which you can book a flight from Illinois to Missoula (average of $214). Flying from Illinois to Missoula in January is currently the most expensive (average of $398). 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.

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Alternative routes for Illinois to Missoula

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Top 3 airlines flying from Illinois to Missoula

Discover the top 3 airlines that operate flights from Illinois 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 2,558,603 searches. Data last updated January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$229Average$334FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$268Average$493FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$271Average$435FlexibilityNo cancel feeOn-time69%

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