HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Missoula

$105+ 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 9/29. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — MSO
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Illinois 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

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 Illinois to Missoula

Keep the following information in mind while searching for Illinois to Missoula flight deals. Data was last updated July 31, 2025.

Round-trip from

$230
(American Airlines)

One-way from

$105
(Hawaiian Airlines)

Popular in

December

Cheapest in

September

Average price

$448

Good round-trip deal

$329 or less

Good one-way deal

$288 or less
From Illinois to Missoula Johnson-Bell Field
Search Deals
One-way flight from Illinois to Missoula Johnson-Bell Field
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($91 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2025
Search Deals
Price to beat on a round-trip flight from Illinois to Missoula Johnson-Bell Field.
Search Deals
Price to beat on a one-way flight from Illinois to Missoula Johnson-Bell Field.
Search Deals

Find 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 July 31, 2025.

This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/128:36 pmORD - MSO
Nonstop3h 42mAmerican Airlines
Tue 9/161:51 pmMSO - ORD
1 stop6h 54mAmerican Airlines
Deal found 7/30$230
This Netflights deal was found by Cheapflights users on 7/30. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/175:45 pmORD - MSO
1 stop7h 42mHawaiian Airlines
Sat 9/206:35 amMSO - ORD
1 stop6h 49mHawaiian Airlines
Deal found 7/30$236
This Frontier deal was found by Cheapflights users on 7/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/15:40 amORD - MSO
1 stop7h 14mFrontier
Mon 8/1112:40 pmMSO - ORD
1 stop10h 52mFrontier
Deal found 7/30$238
This Alaska Airlines deal was found by Cheapflights users on 7/31. 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.
Wed 9/245:45 pmORD - MSO
1 stop7h 42mAlaska Airlines
Sun 9/286:40 pmMSO - ORD
1 stop11h 23mAlaska Airlines
Deal found 7/31$240
This Delta deal was found by Cheapflights users on 7/30. 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 9/233:55 pmORD - MSO
2 stops9h 23mDelta
Tue 9/305:30 amMSO - ORD
1 stop5h 23mDelta
Deal found 7/30$242
This Delta deal was found by Cheapflights users on 7/30. 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 9/237:15 pmMDW - MSO
1 stop5h 31mDelta
Sat 9/275:45 amMSO - MDW
1 stop6h 18mDelta
Deal found 7/30$253
This United Airlines deal was found by Cheapflights users on 7/31. 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 8/234:10 pmORD - MSO
1 stop6h 12mUnited Airlines
Fri 8/2912:30 pmMSO - ORD
Nonstop3h 24mUnited Airlines
Deal found 7/31$259
This American Airlines deal was found by Cheapflights users on 7/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:10 amSTL - MSO
1 stop18h 08mAmerican Airlines
Wed 10/16:40 amMSO - STL
1 stop14h 13mAmerican Airlines
Deal found 7/30$300
This American Airlines deal was found by Cheapflights users on 7/31. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/176:15 pmPIA - MSO
1 stop6h 03mAmerican Airlines
Mon 9/221:51 pmMSO - PIA
1 stop8h 32mAmerican Airlines
Deal found 7/31$324
This Mytrip deal was found by Cheapflights users on 7/31. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/117:09 pmORD - MSO
2 stops19h 55mMultiple Airlines
Mon 9/154:48 pmMSO - ORD
2 stops19h 21mMultiple Airlines
Deal found 7/31$326
This Delta deal was found by Cheapflights users on 7/29. 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 8/195:30 pmSTL - MSO
1 stop7h 00mDelta
Sat 8/235:49 amMSO - STL
1 stop7h 41mDelta
Deal found 7/29$335
This Alaska Airlines deal was found by Cheapflights users on 7/31. 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.
Mon 9/83:35 pmSTL - MSO
1 stop9h 52mAlaska Airlines
Mon 9/156:40 pmMSO - STL
1 stop18h 59mAlaska Airlines
Deal found 7/31$350

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 July 31, 2025.
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

Fri 9/12

8:36 pm-11:18 pm

Nonstop3h 42m

Missoula Johnson-Bell Field

Tue 9/16

1:51 pm-9:45 pm

1 stop6h 54m

$230

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Wed 9/17

5:45 pm-12:27 am

1 stop7h 42m

Missoula Johnson-Bell Field

Sat 9/20

6:35 am-2:24 pm

1 stop6h 49m

$236

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Tue 9/23

3:55 pm-12:18 am

2 stops9h 23m

Missoula Johnson-Bell Field

Tue 9/30

5:30 am-11:53 am

1 stop5h 23m

$242

ChicagoMissoula

MDW - MSO

MDWMSO

Chicago Midway

Tue 9/23

7:15 pm-11:46 pm

1 stop5h 31m

Missoula Johnson-Bell Field

Sat 9/27

5:45 am-1:03 pm

1 stop6h 18m

$253

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Sat 8/23

4:10 pm-9:22 pm

1 stop6h 12m

Missoula Johnson-Bell Field

Fri 8/29

12:30 pm-4:54 pm

Nonstop3h 24m

$259

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Fri 9/12

5:45 pm-12:27 am

1 stop7h 42m

Missoula Johnson-Bell Field

Tue 9/16

5:45 am-1:11 pm

1 stop6h 26m

$269

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Sat 9/27

6:10 am-11:18 pm

1 stop18h 08m

Missoula Johnson-Bell Field

Wed 10/1

6:40 am-9:53 pm

1 stop14h 13m

$300

PeoriaMissoula

PIA - MSO

PIAMSO

Greater Peoria

Wed 9/17

6:15 pm-11:18 pm

1 stop6h 03m

Missoula Johnson-Bell Field

Mon 9/22

1:51 pm-11:23 pm

1 stop8h 32m

$324

ChicagoMissoula

ORD - MSO

ORDMSO

Chicago O'Hare Intl

Thu 9/11

7:09 pm-2:04 pm

2 stops19h 55m

Missoula Johnson-Bell Field

Mon 9/15

4:48 pm-1:09 pm

2 stops19h 21m

$326

St. LouisMissoula

STL - MSO

STLMSO

Lambert-St Louis

Tue 8/19

5:30 pm-11:30 pm

1 stop7h 00m

Missoula Johnson-Bell Field

Sat 8/23

5:49 am-2:30 pm

1 stop7h 41m

$335

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/30

Showing 1-10 of 34 results
1
2
3
4

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 $365). Flying from Illinois to Missoula in March is currently the most expensive (average of $506). 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 July 31, 2025.

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 July 31, 2025.

The most flights from USIL to MSO are scheduled on a Monday (6 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (2 on average).

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 July 31, 2025.
Read through reviews of airlines operating flights from Illinois to Missoula, such as Alaska Airlines, Delta, and Hawaiian Airlines. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

Jonathan,Jul 2025

SEA - BOS

Fantastic Check-in with easy baggage drop. While it took a while to find out which was the gate, the boarding was a dream, the stewards were simply incredible and the flight fantastic.

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.

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

    $105 is the cheapest one-way deal found within the past few days, from Hawaiian Airlines. You may also be able to find cheap deals on American Airlines and Frontier, with prices starting from $117 and $119, 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, Lambert-St Louis - Missoula Johnson-Bell Field and Chicago Midway - 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 United Airlines (95%), Alaska Airlines (84%) or American Airlines (82%) 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 $111. On average you can expect to pay $442. The most popular route, (Chicago O'Hare Intl - Missoula Johnson-Bell Field), can usually be booked for $210.

  • 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 $365). Flying from Illinois to Missoula in March is currently the most expensive (average of $506). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Illinois to Missoula

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to Kalispell flights
Newark to Bozeman flights
John F Kennedy Intl to Bozeman flights
O'Hare Intl to Bozeman flights
Minneapolis to Bozeman flights
Dulles Intl to Bozeman flights
Baltimore to Bozeman flights
LaGuardia to Bozeman flights
San Francisco to Bozeman flights
Denver to Bozeman flights
Atlanta to Bozeman flights
Los Angeles to Kalispell flights
Minneapolis to Kalispell flights
Hobby to Bozeman flights
San Francisco to Kalispell flights
Reagan-National to Bozeman flights
Dallas/Fort Worth to Kalispell flights
Providence to Bozeman flights
Boston to Bozeman flights
Los Angeles to Bozeman flights
Seattle to Bozeman flights
Philadelphia to Bozeman flights
Dallas/Fort Worth to Bozeman flights
Philadelphia to Kalispell flights
Hobby to Kalispell flights
John F Kennedy Intl to Kalispell flights
Midway to Kalispell flights
George Bush Intcntl to Bozeman flights
Denver to Kalispell flights
Tampa to Bozeman flights
Minneapolis to Missoula flights
Newark to Kalispell flights
Portland to Billings flights
Seattle to Billings flights
Orlando to Kalispell flights
LaGuardia to Kalispell flights
Midway to Bozeman flights
Denver to Missoula flights
Raleigh to Bozeman flights
Orlando to Bozeman flights
Reagan-National to Kalispell flights
Dulles Intl to Kalispell flights
Seattle to Kalispell flights
Sky Harbor Intl to Bozeman flights
Detroit to Bozeman flights
O'Hare Intl to Missoula flights
Atlanta to Kalispell flights
San Diego to Bozeman flights
George Bush Intcntl to Kalispell flights
Seattle to Missoula flights

Top 4 airlines flying from Illinois to Missoula

Discover the top 4 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$229Average$485FlexibilityNo cancel feeOn-time71%
DeltaCheapest$248Average$321FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$267Average$423FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$271Average$519FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.