$49+ 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 2/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DTW
Feb 26 — Mar 51
1 adult, Economy
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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 Illinois to Michigan
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 27, 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 27, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/25. 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.
Mon 2/238:22 pm
STL
- ORD
1 stop14h 29m
Frontier
Mon 3/23:50 pm
ORD
- STL
1 stop30h 37m
Frontier
Deal found 1/25![Frontier logo]()
$134
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.
Tue 2/243:49 pm
STL
- ORD
1 stop25h 57m
Multiple Airlines
Tue 3/38:30 am
ORD
- STL
1 stop13h 57m
Multiple Airlines
Deal found 1/26![Multiple Airlines logo]()
$135
This Priceline deal was found by Cheapflights users on 1/25. 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.
Sat 2/282:51 pm
STL
- DTW
1 stop8h 04m
Frontier
Mon 3/26:00 am
DTW
- STL
1 stop8h 09m
Frontier
Deal found 1/25![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 1/25. 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.
Fri 2/278:22 pm
STL
- DTW
1 stop11h 10m
Frontier
Sun 3/15:06 pm
DTW
- STL
1 stop14h 45m
Frontier
Deal found 1/25![Frontier logo]()
$139
This Frontier deal was found by Cheapflights users on 1/24. 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 2/142:51 pm
STL
- DTW
1 stop8h 04m
Frontier
Wed 2/188:30 am
DTW
- STL
1 stop8h 23m
Frontier
Deal found 1/24![Frontier logo]()
$144
This CheapOair deal was found by Cheapflights users on 1/25. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/253:49 pm
STL
- ORD
1 stop18h 57m
Frontier
Wed 3/48:30 am
ORD
- STL
1 stop13h 57m
Frontier
Deal found 1/25![Frontier logo]()
$149
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 Kiwi.com deal was found by Cheapflights users on 1/25. 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 1/25![Multiple Airlines logo]()
$153
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.
Thu 2/2610:11 pm
STL
- ORD
1 stop19h 15m
Frontier
Mon 3/23:50 pm
ORD
- STL
1 stop30h 37m
Frontier
Deal found 1/26![Frontier logo]()
$156
This Southwest deal was found by Cheapflights users on 1/25. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/212:40 pm
STL
- MDW
Nonstop1h 05m
Southwest
Mon 2/232:40 pm
MDW
- STL
Nonstop1h 15m
Southwest
Deal found 1/25![Southwest logo]()
$157
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 2/48:22 pm
STL
- MDW
1 stop15h 23m
Frontier
Sun 2/86:20 am
MDW
- STL
1 stop24h 31m
Frontier
Deal found 1/26![Frontier logo]()
$158
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 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | Expedia 3 stars |
Round-trip from | $134 (Kiwi.com) |
One-way from | $49 (Southwest) |
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 27, 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
St. LouisDetroit
STL - DTW
STLDTW
Lambert-St Louis
Sat 2/14
2:51 pm-11:55 pm
1 stop8h 04m
Detroit Metropolitan Wayne County
Wed 2/18
8:30 am-3:53 pm
1 stop8h 23m
$144
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Wed 2/25
3:49 pm-10:46 am
1 stop18h 57m
Chicago O'Hare Intl
Wed 3/4
8:30 am-10:27 pm
1 stop13h 57m
$149
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Sat 2/21
2:40 pm-3:45 pm
Nonstop1h 05m
Chicago Midway
Mon 2/23
8:15 am-9:35 am
Nonstop1h 20m
$157
St. LouisDetroit
STL - DTW
STLDTW
Lambert-St Louis
Wed 2/18
8:17 pm-8:07 am
1 stop10h 50m
Detroit Metropolitan Wayne County
Sat 2/21
3:17 pm-11:59 pm
1 stop9h 42m
$165
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Wed 2/25
5:55 pm-7:05 pm
Nonstop1h 10m
Chicago Midway
Sat 2/28
3:10 pm-8:00 pm
1 stop4h 50m
$167
ChicagoGrand Rapids
ORD - GRR
ORDGRR
Chicago O'Hare Intl
Tue 2/17
8:10 am-10:12 am
Nonstop1h 02m
Grand Rapids Gerald R. Ford Intl
Thu 2/19
7:42 pm-7:56 pm
Nonstop1h 14m
$171
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Mon 2/23
9:55 am-11:28 am
Nonstop1h 33m
Chicago O'Hare Intl
Wed 2/25
8:10 pm-9:40 pm
Nonstop1h 30m
$171
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Mon 2/16
6:00 am-7:28 am
Nonstop1h 28m
Chicago O'Hare Intl
Thu 2/19
12:24 pm-1:43 pm
Nonstop1h 19m
$171
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Thu 2/19
4:30 pm-5:40 pm
Nonstop1h 10m
Chicago Midway
Mon 2/23
8:30 pm-9:45 pm
Nonstop1h 15m
$171
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Thu 2/19
7:41 am-9:10 am
Nonstop1h 29m
Chicago O'Hare Intl
Mon 2/23
7:40 pm-9:05 pm
Nonstop1h 25m
$173
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 27, 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 27, 2026.
The most flights from USIL to USMI are scheduled on a Tuesday (61 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (29 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 27, 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.
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Denver Air Connection
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
8.0
Reviews
1 / 20
2.0
MediocreThomas,Dec 2025
SEA - DEN
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Crew
8.6
Overall
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 27, 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% |