$49+ Cheap flights from Michigan 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 5/6. Fares are subject to change and may not be available on all flights or dates of travel.
DTW — ORD
Mar 23 — Mar 301
1 adult, Economy
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Find cheap flights from Michigan to Illinois 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
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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 Michigan to Illinois
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Cheapest flights from Michigan to IllinoisExplore the most affordable flight options available from Michigan to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 21, 2026.
Explore the most affordable flight options available from Michigan to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 21, 2026.
This Southwest deal was found by Cheapflights users on 2/17. 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.
Tue 3/104:45 pm
MDW
- STL
Nonstop1h 15m
Southwest
Tue 3/108:50 pm
STL
- MDW
Nonstop1h 05m
Southwest
Deal found 2/17![Southwest logo]()
$97
This American Airlines deal was found by Cheapflights users on 2/17. 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 4/1610:30 pm
ORD
- STL
Nonstop1h 16m
American Airlines
Sat 4/187:05 am
STL
- ORD
Nonstop1h 31m
American Airlines
Deal found 2/17![American Airlines logo]()
$97
This Southwest deal was found by Cheapflights users on 2/17. 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.
Mon 3/1611:15 am
MDW
- STL
Nonstop1h 15m
Southwest
Tue 3/174:00 pm
STL
- MDW
Nonstop1h 05m
Southwest
Deal found 2/17![Southwest logo]()
$134
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Mon 4/67:40 pm
ORD
- STL
Nonstop1h 28m
United Airlines
Wed 4/89:10 am
STL
- ORD
Nonstop1h 30m
United Airlines
Deal found 2/17![United Airlines logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 2/18. 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 4/287:04 pm
DTW
- STL
1 stop12h 46m
Frontier
Wed 4/298:23 pm
STL
- DTW
1 stop11h 42m
Frontier
Deal found 2/18![Frontier logo]()
$136
This Kiwi.com deal was found by Cheapflights users on 2/18. 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 4/226:15 am
DTW
- ORD
1 stop10h 02m
Multiple Airlines
Tue 4/288:25 am
ORD
- DTW
1 stop14h 54m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$141
This Mytrip deal was found by Cheapflights users on 2/19. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/181:28 pm
DTW
- ORD
1 stop10h 37m
Spirit Airlines
Mon 4/205:09 pm
ORD
- DTW
1 stop6h 11m
Spirit Airlines
Deal found 2/19![Spirit Airlines logo]()
$142
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/2311:34 am
DTW
- ORD
1 stop13h 48m
Spirit Airlines
Mon 3/306:01 pm
ORD
- DTW
1 stop13h 45m
Spirit Airlines
Deal found 2/21![Spirit Airlines logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 4/156:15 am
DTW
- ORD
1 stop10h 02m
Multiple Airlines
Mon 4/205:09 pm
ORD
- DTW
1 stop6h 11m
Multiple Airlines
Deal found 2/17![Multiple Airlines logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 2/18. 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 4/287:04 pm
DTW
- STL
1 stop12h 46m
Multiple Airlines
Wed 4/298:23 pm
STL
- DTW
1 stop14h 15m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$145
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:00 am
DTW
- MDW
1 stop8h 02m
Multiple Airlines
Tue 3/319:30 am
MDW
- DTW
1 stop9h 54m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$145
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:05 am
DTW
- STL
1 stop5h 32m
Multiple Airlines
Mon 3/2312:16 pm
STL
- DTW
1 stop18h 51m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$147
Best flights from Michigan to IllinoisDiscover carefully curated flight deals from Michigan to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 21, 2026.
Discover carefully curated flight deals from Michigan to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 21, 2026.
This Southwest deal was found by Cheapflights users on 2/17. 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.
Tue 3/104:45 pm
MDW
- STL
Nonstop1h 15m
Southwest
Tue 3/108:50 pm
STL
- MDW
Nonstop1h 05m
Southwest
Deal found 2/17![Southwest logo]()
$97
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Mon 4/67:40 pm
ORD
- STL
Nonstop1h 28m
United Airlines
Wed 4/89:10 am
STL
- ORD
Nonstop1h 30m
United Airlines
Deal found 2/17![United Airlines logo]()
$134
This American Airlines deal was found by Cheapflights users on 2/18. 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 3/186:00 am
GRR
- ORD
Nonstop1h 14m
American Airlines
Wed 3/1810:15 pm
ORD
- GRR
Nonstop0h 59m
American Airlines
Deal found 2/18![American Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 2/17. 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 3/105:30 am
ORD
- STL
1 stop5h 39m
Delta
Tue 3/105:25 pm
STL
- ORD
1 stop4h 01m
Delta
Deal found 2/17![Delta logo]()
$157
This Frontier deal was found by Cheapflights users on 2/19. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/84:14 pm
DTW
- ORD
1 stop7h 43m
Frontier
Sun 5/107:43 am
ORD
- DTW
1 stop16h 01m
Frontier
Deal found 2/19![Frontier logo]()
$160
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 3/510:59 pm
DTW
- STL
2 stops13h 50m
Multiple Airlines
Mon 3/92:09 pm
STL
- DTW
1 stop25h 03m
Multiple Airlines
Deal found 2/17![Multiple Airlines logo]()
$240
This Southwest deal was found by Cheapflights users on 2/17. 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.
Mon 3/1611:15 am
MDW
- STL
Nonstop1h 15m
Southwest
Tue 3/174:00 pm
STL
- MDW
Nonstop1h 05m
Southwest
Deal found 2/17![Southwest logo]()
$134
This United Airlines deal was found by Cheapflights users on 2/17. 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 3/101:18 pm
ORD
- STL
Nonstop1h 31m
United Airlines
Tue 3/107:00 pm
STL
- ORD
Nonstop1h 35m
United Airlines
Deal found 2/17![United Airlines logo]()
$147
This American Airlines deal was found by Cheapflights users on 2/18. 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.
Sun 3/227:00 am
GRR
- ORD
Nonstop1h 19m
American Airlines
Tue 3/248:15 am
ORD
- GRR
Nonstop1h 02m
American Airlines
Deal found 2/18![American Airlines logo]()
$157
This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/306:00 am
GRR
- ORD
Nonstop1h 15m
United Airlines
Sun 5/310:45 pm
ORD
- GRR
Nonstop1h 10m
United Airlines
Deal found 2/19![United Airlines logo]()
$157
This American Airlines deal was found by Cheapflights users on 2/17. 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 3/136:00 am
GRR
- ORD
Nonstop1h 14m
American Airlines
Mon 3/1610:15 pm
ORD
- GRR
Nonstop0h 59m
American Airlines
Deal found 2/17![American Airlines logo]()
$157
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.
Sat 3/213:37 pm
GRR
- ORD
1 stop5h 40m
Delta
Sat 3/289:50 am
ORD
- GRR
1 stop4h 07m
Delta
Deal found 2/20![Delta logo]()
$177
This Frontier deal was found by Cheapflights users on 2/17. 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.
Thu 4/1610:55 am
ORD
- STL
1 stop8h 17m
Frontier
Sat 4/184:16 pm
STL
- ORD
1 stop14h 31m
Frontier
Deal found 2/17![Frontier logo]()
$181
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/167:30 am
GRR
- ORD
Nonstop1h 09m
United Airlines
Sun 4/1910:45 pm
ORD
- GRR
Nonstop1h 14m
United Airlines
Deal found 2/20![United Airlines logo]()
$157
This American Airlines deal was found by Cheapflights users on 2/17. 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.
Tue 3/247:00 am
GRR
- ORD
Nonstop1h 19m
American Airlines
Sat 3/2810:15 pm
ORD
- GRR
Nonstop0h 59m
American Airlines
Deal found 2/17![American Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 2/18. 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 3/243:34 pm
GRR
- ORD
1 stop4h 00m
Delta
Wed 3/251:57 pm
ORD
- GRR
1 stop2h 50m
Delta
Deal found 2/18![Delta logo]()
$177
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/218:10 am
DTW
- MDW
Nonstop1h 15m
Southwest
Sat 3/287:00 pm
MDW
- DTW
Nonstop1h 10m
Southwest
Deal found 2/19![Southwest logo]()
$181
This American Airlines deal was found by Cheapflights users on 2/18. 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 5/15:00 am
GRR
- ORD
Nonstop1h 11m
American Airlines
Sun 5/37:14 am
ORD
- GRR
Nonstop1h 10m
American Airlines
Deal found 2/18![American Airlines logo]()
$157
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 3/207:48 pm
DTW
- ORD
Nonstop1h 29m
Delta
Sun 3/227:14 pm
ORD
- DTW
Nonstop1h 27m
Delta
Deal found 2/20![Delta logo]()
$181
This Southwest deal was found by Cheapflights users on 2/17. 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.
Mon 4/610:15 pm
MDW
- STL
Nonstop1h 15m
Southwest
Wed 4/85:35 am
STL
- MDW
Nonstop1h 10m
Southwest
Deal found 2/17![Southwest logo]()
$186
This American Airlines deal was found by Cheapflights users on 2/17. 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 3/207:00 am
GRR
- ORD
Nonstop1h 19m
American Airlines
Sat 3/2810:15 pm
ORD
- GRR
Nonstop0h 59m
American Airlines
Deal found 2/17![American Airlines logo]()
$157
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Thu 4/167:20 pm
MBS
- ORD
Nonstop1h 30m
United Airlines
Mon 4/204:21 pm
ORD
- MBS
Nonstop1h 19m
United Airlines
Deal found 2/17![United Airlines logo]()
$179
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.
Sat 3/2112:58 pm
DTW
- ORD
Nonstop1h 26m
Delta
Sun 4/57:10 am
ORD
- DTW
Nonstop1h 20m
Delta
Deal found 2/21![Delta logo]()
$181
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/36:02 pm
ORD
- STL
1 stop12h 49m
Multiple Airlines
Wed 3/48:17 pm
STL
- ORD
2 stops22h 54m
Multiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$256
This United Airlines deal was found by Cheapflights users on 2/17. 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 5/92:14 pm
MBS
- ORD
Nonstop1h 30m
United Airlines
Sun 5/1011:15 am
ORD
- MBS
Nonstop1h 16m
United Airlines
Deal found 2/17![United Airlines logo]()
$179
This Expedia deal was found by Cheapflights users on 2/19. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/134:18 pm
ORD
- STL
1 stop7h 01m
Frontier
Mon 3/164:51 pm
STL
- ORD
1 stop6h 47m
Frontier
Deal found 2/19![Frontier logo]()
$240
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.
Mon 4/2712:25 pm
DTW
- MDW
Nonstop1h 18m
Delta
Tue 4/281:24 pm
MDW
- DTW
Nonstop1h 15m
Delta
Deal found 2/21![Delta logo]()
$181
This Southwest deal was found by Cheapflights users on 2/18. 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 4/255:05 pm
DTW
- MDW
Nonstop1h 10m
Southwest
Wed 4/298:15 am
MDW
- DTW
1 stop3h 45m
Southwest
Deal found 2/18![Southwest logo]()
$201
This KAYAK deal was found by Cheapflights users on 2/18. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/305:45 am
DTW
- ORD
Nonstop1h 25m
American Airlines
Wed 4/17:30 am
ORD
- DTW
Nonstop1h 26m
American Airlines
Deal found 2/18![American Airlines logo]()
$171
This United Airlines deal was found by Cheapflights users on 2/17. 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.
Thu 3/127:55 pm
MBS
- ORD
Nonstop1h 32m
United Airlines
Tue 3/1711:00 am
ORD
- MBS
Nonstop1h 20m
United Airlines
Deal found 2/17![United Airlines logo]()
$179
Last-minute flights from Michigan to IllinoisDiscover last-minute flight deals from Michigan to Illinois. Data last updated February 21, 2026 and is based on user searches.
Discover last-minute flight deals from Michigan to Illinois. Data last updated February 21, 2026 and is based on user searches.
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/85:17 pm
DTW
- STL
1 stop21h 02m
Frontier
Wed 3/1111:32 am
STL
- DTW
1 stop19h 35m
Frontier
Deal found 2/21![Frontier logo]()
$154
This Southwest deal was found by Cheapflights users on 2/17. 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.
Tue 3/104:45 pm
MDW
- STL
Nonstop1h 15m
Southwest
Tue 3/108:50 pm
STL
- MDW
Nonstop1h 05m
Southwest
Deal found 2/17![Southwest logo]()
$97
This United Airlines deal was found by Cheapflights users on 2/17. 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 3/101:18 pm
ORD
- STL
Nonstop1h 31m
United Airlines
Tue 3/107:00 pm
STL
- ORD
Nonstop1h 35m
United Airlines
Deal found 2/17![United Airlines logo]()
$147
This United Airlines deal was found by Cheapflights users on 2/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/133:43 pm
GRR
- ORD
Nonstop1h 12m
United Airlines
Tue 3/1710:45 am
ORD
- GRR
Nonstop1h 10m
United Airlines
Deal found 2/19![United Airlines logo]()
$157
This Southwest deal was found by Cheapflights users on 2/17. 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.
Mon 3/1611:15 am
MDW
- STL
Nonstop1h 15m
Southwest
Tue 3/174:00 pm
STL
- MDW
Nonstop1h 05m
Southwest
Deal found 2/17![Southwest logo]()
$134
This CheapOair deal was found by Cheapflights users on 2/18. 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.
Mon 3/1611:34 am
DTW
- ORD
1 stop13h 48m
Spirit Airlines
Tue 3/176:01 pm
ORD
- DTW
1 stop13h 45m
Spirit Airlines
Deal found 2/18![Spirit Airlines logo]()
$149
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/169:02 am
DTW
- STL
1 stop5h 32m
Frontier
Mon 3/2312:16 pm
STL
- DTW
1 stop18h 51m
Frontier
Deal found 2/21![Frontier logo]()
$151
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/186:05 am
DTW
- STL
1 stop5h 32m
Multiple Airlines
Mon 3/2312:16 pm
STL
- DTW
1 stop18h 51m
Multiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 2/18. 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 3/186:00 am
DTW
- ORD
1 stop10h 59m
Multiple Airlines
Wed 3/2512:05 pm
ORD
- DTW
1 stop7h 43m
Multiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$155
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/2311:34 am
DTW
- ORD
1 stop13h 48m
Spirit Airlines
Mon 3/306:01 pm
ORD
- DTW
1 stop13h 45m
Spirit Airlines
Deal found 2/21![Spirit Airlines logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 2/17. 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 3/2311:34 am
DTW
- ORD
1 stop13h 48m
Spirit Airlines
Wed 3/256:01 pm
ORD
- DTW
1 stop13h 45m
Spirit Airlines
Deal found 2/17![Spirit Airlines logo]()
$147
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/246:00 am
DTW
- MDW
1 stop8h 02m
Multiple Airlines
Tue 3/319:30 am
MDW
- DTW
1 stop9h 54m
Multiple Airlines
Deal found 2/21![Multiple Airlines logo]()
$145
One-way flights from Michigan to IllinoisSearch for one-way flight options from Michigan to Illinois. Find affordable one-way fares based on user searches. Data last updated February 21, 2026.
Search for one-way flight options from Michigan to Illinois. Find affordable one-way fares based on user searches. Data last updated February 21, 2026.
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/259:05 pm
MDW
- STL
Nonstop1h 15m
Southwest
Deal found 2/19![Southwest logo]()
$49
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/317:40 pm
ORD
- STL
Nonstop1h 28m
United Airlines
Deal found 2/20![United Airlines logo]()
$49
This Southwest deal was found by Cheapflights users on 2/18. 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 4/46:25 am
MDW
- STL
Nonstop1h 20m
Southwest
Deal found 2/18![Southwest logo]()
$59
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/288:12 pm
ORD
- STL
Nonstop1h 30m
United Airlines
Deal found 2/20![United Airlines logo]()
$59
This Southwest deal was found by Cheapflights users on 2/18. 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.
Tue 4/1411:35 am
MDW
- STL
2 stops6h 20m
Southwest
Deal found 2/18![Southwest logo]()
$64
This Southwest 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/202:40 pm
ORD
- STL
1 stop7h 20m
Southwest
Deal found 2/20![Southwest logo]()
$64
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.
Tue 3/1711:34 am
DTW
- ORD
1 stop13h 48m
Spirit Airlines
Deal found 2/20![Spirit Airlines logo]()
$66
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1810:56 am
ORD
- STL
Nonstop1h 31m
United Airlines
Deal found 2/20![United Airlines logo]()
$66
This Mytrip deal was found by Cheapflights users on 2/18. 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.
Mon 3/2311:34 am
DTW
- ORD
1 stop13h 48m
Spirit Airlines
Deal found 2/18![Spirit Airlines logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/287:04 pm
DTW
- STL
1 stop12h 46m
Frontier
Deal found 2/19![Frontier logo]()
$69
This Southwest deal was found by Cheapflights users on 2/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/163:05 pm
MDW
- STL
1 stop5h 15m
Southwest
Deal found 2/19![Southwest logo]()
$69
This American Airlines deal was found by Cheapflights users on 2/18. 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.
Sun 5/177:00 am
ORD
- STL
Nonstop1h 25m
American Airlines
Deal found 2/18![American Airlines logo]()
$69
Find flight deals from Michigan to Illinois
Keep the following information in mind while searching for Michigan to Illinois flight deals. Data was last updated February 21, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $97 (Southwest) |
One-way from | $49 (Southwest) |
Popular in | May |
Cheapest in | September |
Average price | $293 |
Good round-trip deal | $85 or less |
Good one-way deal | $49 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Michigan 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 21, 2026.
Use the filters below to find and compare flights from Michigan to Illinois that are best for you.
Fly from
Michigan
Fly to
Illinois
Route
Depart
Return
Price
ChicagoSt. Louis
MDW - STL
MDWSTL
Chicago Midway
Tue 3/10
4:45 pm-6:00 pm
Nonstop1h 15m
Lambert-St Louis
Tue 3/10
8:50 pm-9:55 pm
Nonstop1h 05m
$97
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Mon 4/6
7:40 pm-9:08 pm
Nonstop1h 28m
Lambert-St Louis
Wed 4/8
9:10 am-10:40 am
Nonstop1h 30m
$134
ChicagoSt. Louis
MDW - STL
MDWSTL
Chicago Midway
Mon 3/16
11:15 am-12:30 pm
Nonstop1h 15m
Lambert-St Louis
Tue 3/17
4:00 pm-5:05 pm
Nonstop1h 05m
$134
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Tue 3/10
1:18 pm-2:49 pm
Nonstop1h 31m
Lambert-St Louis
Tue 3/10
7:00 pm-8:35 pm
Nonstop1h 35m
$147
Grand RapidsChicago
GRR - ORD
GRRORD
Grand Rapids Gerald R. Ford Intl
Wed 3/18
6:00 am-6:14 am
Nonstop1h 14m
Chicago O'Hare Intl
Wed 3/18
10:15 pm-12:14 am
Nonstop0h 59m
$157
ChicagoSt. Louis
ORD - STL
ORDSTL
Chicago O'Hare Intl
Tue 3/10
5:30 am-11:09 am
1 stop5h 39m
Lambert-St Louis
Tue 3/10
5:25 pm-9:26 pm
1 stop4h 01m
$157
Grand RapidsChicago
GRR - ORD
GRRORD
Grand Rapids Gerald R. Ford Intl
Sun 3/22
7:00 am-7:19 am
Nonstop1h 19m
Chicago O'Hare Intl
Tue 3/24
8:15 am-10:17 am
Nonstop1h 02m
$157
Grand RapidsChicago
GRR - ORD
GRRORD
Grand Rapids Gerald R. Ford Intl
Thu 4/30
6:00 am-6:15 am
Nonstop1h 15m
Chicago O'Hare Intl
Sun 5/3
10:45 pm-12:55 am
Nonstop1h 10m
$157
Grand RapidsChicago
GRR - ORD
GRRORD
Grand Rapids Gerald R. Ford Intl
Fri 3/13
6:00 am-6:14 am
Nonstop1h 14m
Chicago O'Hare Intl
Mon 3/16
10:15 pm-12:14 am
Nonstop0h 59m
$157
Grand RapidsChicago
GRR - ORD
GRRORD
Grand Rapids Gerald R. Ford Intl
Thu 4/16
7:30 am-7:39 am
Nonstop1h 09m
Chicago O'Hare Intl
Sun 4/19
10:45 pm-12:59 am
Nonstop1h 14m
$157
Showing 1-10 of 60 results
Best time to book a flight from Michigan to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Michigan with our price prediction graph.
MDW-STL
ORD-STL
GRR-ORD
DTW-ORD
DTW-STL
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 Michigan to Illinois
USMI-USIL
MDW-STL
ORD-STL
GRR-ORD
DTW-ORD
What is the cheapest month to book a flight from Michigan to Illinois?
Currently, November is the cheapest month in which you can book a flight from Michigan to Illinois (average of $53). Flying from Michigan to Illinois in February is currently the most expensive (average of $138). 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 MI to IL?
Find hourly flight availability from Michigan 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 21, 2026.
Unlike in the evening, when flights are generally more expensive, you can save up to 13% on flights from Michigan to Illinois by exploring options for tickets at noon.
What is the cheapest day to fly from Michigan to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Michigan to Illinois. Price data was last updated on February 21, 2026.
Travelers seeking maximum savings on their Michigan to Illinois flight should consider departing on Monday afternoons when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from Michigan to Illinois
Explore weekly flight availability from Michigan 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 21, 2026.
The most flights from USMI to USIL are scheduled on a Friday (80 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (56 on average).
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 21, 2026.
See what other customers who have flown with Denver Air Connection, Southwest, and Delta from Michigan to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Denver Air Connection
Entertainment
7.6
Overall
8.1
Boarding
8.1
Crew
9.1
Food
8.1
Comfort
8.6
Denver Air Connection
Denver Air Connection
Entertainment
7.6
Overall
8.1
Boarding
8.1
Crew
9.1
Food
8.1
Comfort
8.6
Denver Air Connection
Entertainment
7.6
Overall
8.1
Boarding
8.1
Crew
9.1
Food
8.1
Comfort
8.6
Denver Air Connection
Entertainment
7.6
Overall
8.1
Boarding
8.1
Crew
9.1
Food
8.1
Comfort
8.6
Denver Air Connection
Entertainment
7.6
Overall
8.1
Boarding
8.1
Crew
9.1
Food
8.1
Comfort
8.6
Denver Air Connection
Entertainment
7.6
Overall
8.1
Boarding
8.1
Crew
9.1
Food
8.1
Comfort
8.6
Related info for your journey
Find useful and relevant information for your journey from Michigan to Illinois. 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
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Alternative routes for Michigan to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Michigan to Illinois by cabin class
Find flights from Michigan to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Michigan and Illinois flights
Browse other Michigan and Illinois flight options. Last updated on February 21, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Illinois
Find the right flight back to Michigan after your stay in Illinois
Michigan to Illinois flights
Consider these flights traveling from Michigan to Illinois.
Top 4 airlines flying from Michigan to Illinois
Discover the top 4 airlines that operate flights from Michigan 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 21, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$91 | Average$289 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$91 | Average$300 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$92 | Average$289 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$97 | Average$239 | FlexibilityNo cancel fee | On-time63% |