$48+ Cheap flights from Illinois to Michigan
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 2/18. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DTW
Feb 28 — Mar 71
1 adult, Economy
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Cheapest flights from Illinois to MichiganExplore the most affordable flight options available from Illinois to Michigan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
Explore the most affordable flight options available from Illinois to Michigan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.
This Frontier deal was found by Cheapflights users on 1/27. 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.
Wed 2/258:17 pm
STL
- DTW
1 stop10h 50m
Frontier
Wed 3/48:30 am
DTW
- STL
1 stop8h 23m
Frontier
Deal found 1/27![Frontier logo]()
$138
This Denver Air Connection deal was found by Cheapflights users on 1/28. 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 Denver Air Connection is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/56:00 pm
ORD
- MKG
Nonstop0h 50m
Denver Air Connection
Mon 3/94:35 pm
MKG
- ORD
Nonstop0h 50m
Denver Air Connection
Deal found 1/28![Denver Air Connection logo]()
$138
This Frontier deal was found by Cheapflights users on 1/28. 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.
Sat 2/288:17 pm
STL
- DTW
1 stop10h 50m
Frontier
Mon 3/26:00 am
DTW
- STL
1 stop8h 09m
Frontier
Deal found 1/28![Frontier logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:17 pm
STL
- DTW
1 stop10h 50m
Multiple Airlines
Thu 2/262:35 pm
DTW
- STL
1 stop17h 16m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$144
This Denver Air Connection deal was found by Cheapflights users on 1/28. 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 Denver Air Connection is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/256:00 pm
ORD
- MKG
Nonstop0h 50m
Denver Air Connection
Sat 2/288:20 am
MKG
- ORD
Nonstop1h 00m
Denver Air Connection
Deal found 1/28![Denver Air Connection logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/282:51 pm
STL
- DTW
1 stop8h 04m
Multiple Airlines
Mon 3/210:59 pm
DTW
- STL
2 stops32h 52m
Multiple Airlines
Deal found 1/28![Multiple Airlines logo]()
$145
This United Airlines deal was found by Cheapflights users on 1/28. 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 2/259:50 am
DEC
- ORD
Nonstop1h 10m
United Airlines
Wed 3/44:50 pm
ORD
- DEC
Nonstop1h 04m
United Airlines
Deal found 1/28![United Airlines logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/258:17 pm
STL
- DTW
1 stop10h 50m
Multiple Airlines
Wed 3/410:59 pm
DTW
- STL
2 stops33h 03m
Multiple Airlines
Deal found 1/27![Multiple Airlines logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/188:17 pm
STL
- DTW
1 stop10h 50m
Multiple Airlines
Sat 2/2110:59 pm
DTW
- STL
2 stops32h 52m
Multiple Airlines
Deal found 1/26![Multiple Airlines logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 1/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/118:17 pm
STL
- MDW
1 stop15h 10m
Frontier
Sun 2/156:00 am
MDW
- STL
1 stop24h 51m
Frontier
Deal found 1/26![Frontier logo]()
$152
This Priceline deal was found by Cheapflights users on 1/27. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/162:15 pm
ORD
- MKG
Nonstop0h 50m
Denver Air Connection
Mon 2/238:20 am
MKG
- ORD
Nonstop1h 00m
Denver Air Connection
Deal found 1/27![Denver Air Connection logo]()
$154
This United Airlines deal was found by Cheapflights users on 1/27. 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 2/117:09 pm
DEC
- ORD
Nonstop1h 16m
United Airlines
Tue 2/174:50 pm
ORD
- DEC
Nonstop1h 04m
United Airlines
Deal found 1/27![United Airlines logo]()
$159
Find flight deals from Illinois to Michigan
Keep the following information in mind while searching for Illinois to Michigan flight deals. Data was last updated January 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $138 (Frontier) |
One-way from | $48 (United Airlines) |
Popular in | January |
Cheapest in | May |
Average price | $503 |
Good round-trip deal | $107 or less |
Good one-way deal | $47 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Michigan 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 29, 2026.
Use the filters below to find and compare flights from Illinois to Michigan that are best for you.
Fly from
Illinois
Fly to
Michigan
Route
Depart
Return
Price
ChicagoMuskegon
ORD - MKG
ORDMKG
Chicago O'Hare Intl
Thu 3/5
6:00 pm-7:50 pm
Nonstop0h 50m
Muskegon
Mon 3/9
4:35 pm-4:25 pm
Nonstop0h 50m
$138
ChicagoMuskegon
ORD - MKG
ORDMKG
Chicago O'Hare Intl
Wed 2/25
6:00 pm-7:50 pm
Nonstop0h 50m
Muskegon
Sat 2/28
8:20 am-8:20 am
Nonstop1h 00m
$144
DecaturChicago
DEC - ORD
DECORD
Decatur Arpt
Wed 2/25
9:50 am-11:00 am
Nonstop1h 10m
Chicago O'Hare Intl
Wed 3/4
4:50 pm-5:54 pm
Nonstop1h 04m
$149
ChicagoMuskegon
ORD - MKG
ORDMKG
Chicago O'Hare Intl
Mon 2/16
2:15 pm-4:05 pm
Nonstop0h 50m
Muskegon
Mon 2/23
8:20 am-8:20 am
Nonstop1h 00m
$154
DecaturChicago
DEC - ORD
DECORD
Decatur Arpt
Wed 2/11
9:49 am-11:05 am
Nonstop1h 16m
Chicago O'Hare Intl
Sun 2/15
7:45 am-8:52 am
Nonstop1h 07m
$159
DecaturChicago
DEC - ORD
DECORD
Decatur Arpt
Fri 6/12
6:55 pm-8:00 pm
Nonstop1h 05m
Chicago O'Hare Intl
Sun 6/21
7:45 am-8:46 am
Nonstop1h 01m
$159
DecaturChicago
DEC - ORD
DECORD
Decatur Arpt
Fri 2/20
7:15 pm-8:25 pm
Nonstop1h 10m
Chicago O'Hare Intl
Sun 2/22
7:45 am-8:52 am
Nonstop1h 07m
$159
DecaturChicago
DEC - ORD
DECORD
Decatur Arpt
Sat 5/2
7:20 pm-8:33 pm
Nonstop1h 13m
Chicago O'Hare Intl
Sat 5/9
4:50 pm-5:58 pm
Nonstop1h 08m
$159
St. LouisDetroit
STL - DTW
STLDTW
Lambert-St Louis
Fri 2/20
8:20 pm-8:32 am
1 stop11h 12m
Detroit Metropolitan Wayne County
Mon 2/23
10:59 pm-10:27 pm
2 stops24h 28m
$162
ChicagoMuskegon
ORD - MKG
ORDMKG
Chicago O'Hare Intl
Mon 2/9
2:15 pm-4:05 pm
Nonstop0h 50m
Muskegon
Fri 2/13
4:35 pm-4:25 pm
Nonstop0h 50m
$168
Showing 1-10 of 60 results
Best time to book a flight from Illinois to Michigan
Have a flexible travel schedule? Discover the best time to fly to Michigan 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 Michigan
What is the cheapest month to book a flight from Illinois to Michigan?
Currently, October is the cheapest month in which you can book a flight from Illinois to Michigan (average of $78). Flying from Illinois to Michigan in February is currently the most expensive (average of $145). 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 MI?
Find hourly flight availability from Illinois to Michigan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 29, 2026.
One of the essential ways to save on airfare from Illinois to Michigan is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the evening could potentially save you up to 24% on airfare.
What is the cheapest day to fly from Illinois to Michigan?
Use this chart to determine the cheapest time to fly round-trip from Illinois to Michigan. Price data was last updated on January 24, 2026.
Travelers seeking maximum savings on their Illinois to Michigan flight should consider departing on Saturday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Illinois to Michigan
Explore weekly flight availability from Illinois to Michigan. 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 29, 2026.
The most flights from USIL to USMI are scheduled on a Thursday (63 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (31 on average).
Reviews of airlines servicing Michigan
Get insights into the airlines that provide service to Michigan. 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 Michigan. Reviews last updated January 29, 2026.
Read through reviews of airlines operating flights from Illinois to Michigan, such as Southwest, Denver Air Connection, and Delta. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Denver Air Connection
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Overall
8.0
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Related info for your journey
Find useful and relevant information for your journey from Illinois to Michigan. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
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Alternative routes for Illinois to Michigan
See prices for flight routes from nearby airports that may be better suited for you.
Top 5 airlines flying from Illinois to Michigan
Discover the top 5 airlines that operate flights from Illinois to Michigan. 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 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$91 | Average$254 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$91 | Average$304 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$97 | Average$340 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$97 | Average$257 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$144 | Average$178 | FlexibilityNo cancel fee | On-time62% |