$138+ Cheap flights from Montana to Illinois
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 8/14. Fares are subject to change and may not be available on all flights or dates of travel.
BZN — ORD
Feb 27 — Mar 61
1 adult, Economy
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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
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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 Montana to Illinois
Keep the following information in mind while searching for Montana to Illinois flight deals. Data was last updated February 22, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $249 (Delta) |
One-way from | $138 (Sun Country Air) |
Popular in | November |
Cheapest in | January |
Average price | $409 |
Good round-trip deal | $460 or less |
Good one-way deal | $216 or less |
Find flight deals from Montana to Illinois
Cheapest flights from Montana to IllinoisExplore the most affordable flight options available from Montana to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 22, 2025.
Explore the most affordable flight options available from Montana to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 22, 2025.
This Delta deal was found by Cheapflights users on 2/20. 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.
Fri 3/216:29 amBIL - ORD
1 stop4h 01mDelta
Fri 3/287:10 pmORD - BIL
1 stop5h 00mDelta
Deal found 2/20![Delta logo]()
$249
This United Airlines deal was found by Cheapflights users on 2/21. 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.
Wed 5/72:40 pmBIL - ORD
1 stop5h 37mUnited Airlines
Sun 5/115:05 amORD - BIL
1 stop5h 34mUnited Airlines
Deal found 2/21![United Airlines logo]()
$250
This Delta deal was found by Cheapflights users on 2/21. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/101:18 pmBZN - ORD
1 stop7h 27mDelta
Mon 4/146:55 pmORD - BZN
1 stop6h 00mDelta
Deal found 2/21![Delta logo]()
$269
This Alaska Airlines deal was found by Cheapflights users on 2/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/256:38 pmMSO - ORD
1 stop10h 02mAlaska Airlines
Mon 3/317:00 amORD - MSO
1 stop7h 39mAlaska Airlines
Deal found 2/21![Alaska Airlines logo]()
$269
This American Airlines deal was found by Cheapflights users on 2/22. 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 11/51:47 pmBZN - STL
1 stop7h 42mAmerican Airlines
Mon 11/107:15 amSTL - BZN
1 stop6h 19mAmerican Airlines
Deal found 2/22![American Airlines logo]()
$287
This United Airlines deal was found by Cheapflights users on 2/22. 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.
Wed 4/22:10 pmBZN - ORD
1 stop7h 52mUnited Airlines
Sat 4/59:09 amORD - BZN
Nonstop3h 28mUnited Airlines
Deal found 2/22![United Airlines logo]()
$299
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/69:53 pmFCA - ORD
1 stop14h 46mMultiple Airlines
Sun 4/138:00 amORD - FCA
1 stop13h 58mMultiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$303
This American Airlines deal was found by Cheapflights users on 2/22. 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.
Thu 7/171:44 pmBZN - ORD
Nonstop3h 01mAmerican Airlines
Mon 7/219:45 amORD - BZN
Nonstop3h 31mAmerican Airlines
Deal found 2/22![American Airlines logo]()
$304
This Delta deal was found by Cheapflights users on 2/20. 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 5/65:55 pmFCA - ORD
1 stop5h 58mDelta
Wed 5/79:30 amORD - FCA
1 stop5h 12mDelta
Deal found 2/20![Delta logo]()
$305
This Alaska Airlines deal was found by Cheapflights users on 2/21. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/102:55 pmBZN - ORD
1 stop8h 04mAlaska Airlines
Mon 9/157:45 amORD - BZN
1 stop7h 20mAlaska Airlines
Deal found 2/21![Alaska Airlines logo]()
$308
This American Airlines deal was found by Cheapflights users on 2/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1111:41 amFCA - ORD
Nonstop3h 24mAmerican Airlines
Tue 9/168:05 amORD - FCA
Nonstop3h 38mAmerican Airlines
Deal found 2/21![American Airlines logo]()
$309
This Mytrip deal was found by Cheapflights users on 2/22. 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.
Fri 5/1610:05 pmMSO - ORD
2 stops18h 45mMultiple Airlines
Mon 5/1911:00 amORD - MSO
1 stop11h 20mMultiple Airlines
Deal found 2/22![Multiple Airlines logo]()
$311
Find flights from Montana to Illinois within your budget
Customize your flight search to find flights from Montana to Illinois 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 February 22, 2025.
Fly from
Montana
Fly to
Illinois
Route
Depart
Return
Price
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Fri 3/21
6:29 am-11:30 am
1 stop4h 01m
Chicago O'Hare Intl
Fri 3/28
7:10 pm-11:10 pm
1 stop5h 00m
$249
BillingsChicago
BIL - ORD
BILORD
Billings Logan Intl
Wed 5/7
2:40 pm-9:17 pm
1 stop5h 37m
Chicago O'Hare Intl
Sun 5/11
5:05 am-9:39 am
1 stop5h 34m
$250
MissoulaChicago
MSO - ORD
MSOORD
Missoula Johnson-Bell Field
Tue 3/25
6:38 pm-5:40 am
1 stop10h 02m
Chicago O'Hare Intl
Mon 3/31
7:00 am-1:39 pm
1 stop7h 39m
$269
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Thu 4/10
1:18 pm-9:45 pm
1 stop7h 27m
Chicago O'Hare Intl
Mon 4/14
6:55 pm-11:55 pm
1 stop6h 00m
$269
BozemanSt. Louis
BZN - STL
BZNSTL
Bozeman Gallatin Field
Thu 4/3
5:45 am-1:19 pm
1 stop6h 34m
Lambert-St Louis
Mon 4/7
5:35 pm-11:31 pm
1 stop6h 56m
$287
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Wed 4/2
2:10 pm-11:02 pm
1 stop7h 52m
Chicago O'Hare Intl
Sat 4/5
9:09 am-11:37 am
Nonstop3h 28m
$299
BozemanChicago
BZN - ORD
BZNORD
Bozeman Gallatin Field
Thu 7/17
1:44 pm-5:45 pm
Nonstop3h 01m
Chicago O'Hare Intl
Mon 7/21
9:45 am-12:16 pm
Nonstop3h 31m
$304
MissoulaChicago
MSO - ORD
MSOORD
Missoula Johnson-Bell Field
Fri 5/16
10:05 pm-5:50 pm
2 stops18h 45m
Chicago O'Hare Intl
Mon 5/19
11:00 am-9:20 pm
1 stop11h 20m
$311
BozemanChicago
BZN - MDW
BZNMDW
Bozeman Gallatin Field
Thu 4/10
10:30 am-8:20 pm
2 stops8h 50m
Chicago Midway
Mon 4/14
5:25 am-9:45 am
1 stop5h 20m
$314
BillingsChicago
BIL - MDW
BILMDW
Billings Logan Intl
Wed 3/5
6:25 am-12:42 pm
1 stop5h 17m
Chicago Midway
Mon 3/10
7:09 pm-11:10 pm
1 stop5h 01m
$324
Showing 1-10 of 60 results
Best time to book a flight from Montana to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Montana 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.
Travel insights for flights from Montana to Illinois
Get recent, data-driven insights about flights from Montana to Illinois including ideal travel times, pricing trends, and more.
What is the cheapest month to book a flight from Montana to Illinois?
Currently, August is the cheapest month in which you can book a flight from Montana to Illinois (average of $245). Flying from Montana to Illinois in March is currently the most expensive (average of $321). 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 MT to IL?
Find hourly flight availability from Montana to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated February 22, 2025.
When flying from Montana to Illinois, 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 Montana to Illinois
Explore weekly flight availability from Montana to Illinois. 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 February 22, 2025.
The most flights from USMT to USIL are scheduled on a Monday (7 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (2 on average).
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated February 22, 2025.
Peruse reviews from past customers who have flown with Southwest, Alaska Airlines and Delta from Montana to Illinois to help guide your decision. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Comfort
8.1
Overall
8.1
Entertainment
7.6
Crew
8.7
Boarding
8.2
Food
7.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.1
Overall
8.1
Entertainment
7.6
Crew
8.7
Boarding
8.2
Food
7.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.1
Overall
8.1
Entertainment
7.6
Crew
8.7
Boarding
8.2
Food
7.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.1
Overall
8.1
Entertainment
7.6
Crew
8.7
Boarding
8.2
Food
7.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.1
Overall
8.1
Entertainment
7.6
Crew
8.7
Boarding
8.2
Food
7.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Comfort
8.1
Overall
8.1
Entertainment
7.6
Crew
8.7
Boarding
8.2
Food
7.1
Reviews
1 / 20
2.0
MediocreAnonymous,Feb 2025
MCO - STL
Related info for your journey
Find useful and relevant information for your journey from Montana to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Montana to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Montana to Illinois
Discover the top 5 airlines that operate flights from Montana to Illinois. 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 February 22, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$205 | Average$457 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$226 | Average$445 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$229 | Average$524 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$238 | Average$544 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$388 | Average$390 | FlexibilityNo cancel fee | On-time63% |