$73+ 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 8/23. Fares are subject to change and may not be available on all flights or dates of travel.
DTW — ORD
Aug 19 — Aug 261
Round-trip
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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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 July 20, 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 July 20, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 8/62:56 pm
DTW
- STL
1 stop19h 01m
Frontier
Mon 8/104:57 pm
STL
- DTW
1 stop6h 43m
Frontier
Deal found 7/15![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Sun 9/203:34 pm
DTW
- STL
1 stop19h 06m
Frontier
Sat 9/2610:35 am
STL
- DTW
1 stop13h 07m
Frontier
Deal found 7/18![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/136:10 am
DTW
- STL
1 stop12h 27m
Frontier
Thu 8/206:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Deal found 7/16![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 7/19. 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.
Thu 8/206:00 am
DTW
- STL
1 stop12h 22m
Frontier
Sun 8/236:17 pm
STL
- DTW
1 stop18h 22m
Frontier
Deal found 7/19![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Sun 8/96:10 am
DTW
- STL
1 stop27h 47m
Frontier
Fri 8/144:57 pm
STL
- DTW
1 stop6h 43m
Frontier
Deal found 7/18![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/76:10 am
DTW
- STL
1 stop27h 47m
Frontier
Fri 8/144:57 pm
STL
- DTW
1 stop6h 43m
Frontier
Deal found 7/16![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 9/106:50 am
DTW
- STL
1 stop27h 50m
Frontier
Sun 9/1310:35 am
STL
- DTW
1 stop13h 07m
Frontier
Deal found 7/16![Frontier logo]()
$148
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 9/143:34 pm
DTW
- STL
1 stop19h 06m
Frontier
Wed 9/1610:35 am
STL
- DTW
1 stop13h 07m
Frontier
Deal found 7/16![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/216:00 am
DTW
- STL
1 stop12h 22m
Frontier
Mon 8/246:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Deal found 7/16![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 7/17. 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.
Sun 8/96:10 am
DTW
- STL
1 stop27h 47m
Frontier
Tue 8/116:34 pm
STL
- DTW
1 stop20h 54m
Frontier
Deal found 7/17![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/96:10 am
DTW
- STL
1 stop27h 47m
Frontier
Thu 8/136:34 pm
STL
- DTW
1 stop29h 06m
Frontier
Deal found 7/16![Frontier logo]()
$157
This United Airlines deal was found by Cheapflights users on 7/16. 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 8/133:52 pm
GRR
- ORD
Nonstop1h 17m
United Airlines
Thu 8/207:45 am
ORD
- GRR
Nonstop1h 17m
United Airlines
Deal found 7/16![United Airlines logo]()
$157
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 July 20, 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 July 20, 2026.
This United Airlines deal was found by Cheapflights users on 7/15. 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 8/85:15 am
GRR
- ORD
Nonstop1h 18m
United Airlines
Tue 8/1110:49 am
ORD
- GRR
Nonstop1h 09m
United Airlines
Deal found 7/15![United Airlines logo]()
$157
This JetBlue deal was found by Cheapflights users on 7/15. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/185:30 pm
DTW
- ORD
1 stop5h 36m
JetBlue
Sun 9/206:20 am
ORD
- DTW
1 stop9h 12m
JetBlue
Deal found 7/15![JetBlue logo]()
$201
This Delta deal was found by Cheapflights users on 7/15. 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 8/69:00 am
DTW
- STL
Nonstop1h 37m
Delta
Mon 8/106:25 pm
STL
- DTW
Nonstop1h 35m
Delta
Deal found 7/15![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 7/19. 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 9/54:45 pm
DTW
- MDW
Nonstop1h 10m
Southwest
Sun 9/66:25 pm
MDW
- DTW
Nonstop1h 10m
Southwest
Deal found 7/19![Southwest logo]()
$217
This American Airlines deal was found by Cheapflights users on 7/17. 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 7/305:29 am
FNT
- ORD
Nonstop1h 22m
American Airlines
Mon 8/39:17 pm
ORD
- FNT
Nonstop1h 17m
American Airlines
Deal found 7/17![American Airlines logo]()
$284
This United Airlines deal was found by Cheapflights users on 7/16. 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 8/137:15 am
GRR
- ORD
Nonstop1h 19m
United Airlines
Mon 8/1712:40 pm
ORD
- GRR
Nonstop1h 10m
United Airlines
Deal found 7/16![United Airlines logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 8/66:34 pm
DTW
- RFD
1 stop14h 15m
Multiple Airlines
Mon 8/106:26 pm
RFD
- DTW
2 stops18h 07m
Multiple Airlines
Deal found 7/15![Multiple Airlines logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 7/19. 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.
Mon 8/106:05 am
MDW
- STL
2 stops13h 18m
Frontier
Fri 8/144:57 pm
STL
- MDW
1 stop16h 54m
Frontier
Deal found 7/19![Frontier logo]()
$342
This JetBlue deal was found by Cheapflights users on 7/19. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/215:30 pm
DTW
- ORD
1 stop5h 36m
JetBlue
Sat 10/36:30 am
ORD
- DTW
1 stop9h 02m
JetBlue
Deal found 7/19![JetBlue logo]()
$211
This United Airlines deal was found by Cheapflights users on 7/19. 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.
Mon 8/173:52 pm
GRR
- ORD
Nonstop1h 17m
United Airlines
Mon 8/246:10 pm
ORD
- GRR
Nonstop1h 07m
United Airlines
Deal found 7/19![United Airlines logo]()
$195
This Delta deal was found by Cheapflights users on 7/15. 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 8/293:50 pm
DTW
- ORD
Nonstop1h 27m
Delta
Sat 9/56:59 am
ORD
- DTW
Nonstop1h 24m
Delta
Deal found 7/15![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 7/16. 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.
Thu 8/131:20 pm
DTW
- STL
1 stop4h 00m
Southwest
Thu 8/206:50 pm
STL
- DTW
Nonstop1h 30m
Southwest
Deal found 7/16![Southwest logo]()
$227
This Delta deal was found by Cheapflights users on 7/16. 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 8/137:25 am
DTW
- ORD
Nonstop1h 31m
Delta
Tue 8/185:20 pm
ORD
- DTW
Nonstop1h 32m
Delta
Deal found 7/16![Delta logo]()
$217
This Southwest deal was found by Cheapflights users on 7/19. 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 9/56:00 am
DTW
- STL
2 stops8h 30m
Southwest
Sun 9/65:50 pm
STL
- DTW
Nonstop1h 30m
Southwest
Deal found 7/19![Southwest logo]()
$232
This Delta deal was found by Cheapflights users on 7/15. 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 9/2812:20 pm
DTW
- MDW
Nonstop1h 19m
Delta
Mon 9/287:01 pm
MDW
- DTW
Nonstop1h 19m
Delta
Deal found 7/15![Delta logo]()
$217
This United Airlines deal was found by Cheapflights users on 7/15. 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 8/283:52 pm
GRR
- ORD
Nonstop1h 17m
United Airlines
Mon 8/315:59 am
ORD
- GRR
Nonstop1h 17m
United Airlines
Deal found 7/15![United Airlines logo]()
$218
This Southwest deal was found by Cheapflights users on 7/18. 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.
Thu 9/37:30 pm
DTW
- MDW
Nonstop1h 10m
Southwest
Mon 9/76:40 pm
MDW
- DTW
Nonstop1h 10m
Southwest
Deal found 7/18![Southwest logo]()
$239
This Delta deal was found by Cheapflights users on 7/16. 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 8/137:25 am
DTW
- ORD
Nonstop1h 31m
Delta
Mon 8/176:59 am
ORD
- DTW
Nonstop1h 24m
Delta
Deal found 7/16![Delta logo]()
$227
This United Airlines deal was found by Cheapflights users on 7/16. 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 8/267:03 pm
MBS
- ORD
Nonstop1h 28m
United Airlines
Sat 9/59:30 pm
ORD
- MBS
Nonstop1h 24m
United Airlines
Deal found 7/16![United Airlines logo]()
$235
This Southwest deal was found by Cheapflights users on 7/17. 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 8/313:50 pm
DTW
- MDW
1 stop6h 10m
Southwest
Mon 9/71:00 pm
MDW
- DTW
Nonstop1h 10m
Southwest
Deal found 7/17![Southwest logo]()
$249
This Delta deal was found by Cheapflights users on 7/16. 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 8/1312:21 pm
DTW
- MDW
Nonstop1h 18m
Delta
Mon 8/179:24 am
MDW
- DTW
Nonstop1h 16m
Delta
Deal found 7/16![Delta logo]()
$227
This United Airlines deal was found by Cheapflights users on 7/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/117:03 pm
MBS
- ORD
Nonstop1h 28m
United Airlines
Tue 8/189:30 pm
ORD
- MBS
Nonstop1h 24m
United Airlines
Deal found 7/18![United Airlines logo]()
$235
This American Airlines deal was found by Cheapflights users on 7/19. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2711:00 pm
ORD
- STL
Nonstop1h 14m
American Airlines
Sun 8/305:23 am
STL
- ORD
1 stop6h 52m
American Airlines
Deal found 7/19![American Airlines logo]()
$351
This Southwest deal was found by Cheapflights users on 7/17. 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 10/265:25 am
DTW
- MDW
1 stop4h 25m
Southwest
Wed 10/281:05 pm
MDW
- DTW
Nonstop1h 05m
Southwest
Deal found 7/17![Southwest logo]()
$249
This Delta deal was found by Cheapflights users on 7/15. 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 8/286:05 pm
GRR
- ORD
1 stop3h 25m
Delta
Mon 8/318:48 am
ORD
- GRR
1 stop4h 05m
Delta
Deal found 7/15![Delta logo]()
$238
This United Airlines deal was found by Cheapflights users on 7/18. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/96:31 pm
FNT
- ORD
Nonstop1h 29m
United Airlines
Sun 10/119:35 pm
ORD
- FNT
Nonstop1h 19m
United Airlines
Deal found 7/18![United Airlines logo]()
$239
This Southwest deal was found by Cheapflights users on 7/17. 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.
Wed 9/28:45 am
DTW
- MDW
Nonstop1h 15m
Southwest
Wed 9/212:45 pm
MDW
- DTW
2 stops7h 30m
Southwest
Deal found 7/17![Southwest logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/278:30 am
DTW
- RFD
1 stop13h 15m
Multiple Airlines
Sun 8/309:35 pm
RFD
- DTW
2 stops12h 50m
Multiple Airlines
Deal found 7/16![Multiple Airlines logo]()
$418
This United Airlines deal was found by Cheapflights users on 7/17. 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 9/106:30 pm
FNT
- ORD
Nonstop1h 28m
United Airlines
Sat 9/123:29 pm
ORD
- FNT
Nonstop1h 22m
United Airlines
Deal found 7/17![United Airlines logo]()
$239
This Delta deal was found by Cheapflights users on 7/18. 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 9/17:58 pm
DTW
- ORD
Nonstop1h 32m
Delta
Tue 9/81:55 pm
ORD
- DTW
Nonstop1h 26m
Delta
Deal found 7/18![Delta logo]()
$239
Last-minute flights from Michigan to IllinoisDiscover last-minute flight deals from Michigan to Illinois. Data last updated July 20, 2026 and is based on user searches.
Discover last-minute flight deals from Michigan to Illinois. Data last updated July 20, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/14. 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 8/46:10 am
DTW
- STL
1 stop12h 27m
Frontier
Fri 8/74:57 pm
STL
- DTW
1 stop6h 43m
Frontier
Deal found 7/14![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 8/62:56 pm
DTW
- STL
1 stop19h 01m
Frontier
Mon 8/104:57 pm
STL
- DTW
1 stop6h 43m
Frontier
Deal found 7/15![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Sun 8/96:10 am
DTW
- STL
1 stop27h 47m
Frontier
Fri 8/144:57 pm
STL
- DTW
1 stop6h 43m
Frontier
Deal found 7/18![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 7/17. 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.
Sun 8/96:10 am
DTW
- STL
1 stop27h 47m
Frontier
Tue 8/116:34 pm
STL
- DTW
1 stop20h 54m
Frontier
Deal found 7/17![Frontier logo]()
$156
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/96:10 am
DTW
- STL
1 stop27h 47m
Frontier
Thu 8/136:34 pm
STL
- DTW
1 stop29h 06m
Frontier
Deal found 7/16![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/136:10 am
DTW
- STL
1 stop12h 27m
Frontier
Thu 8/206:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Deal found 7/16![Frontier logo]()
$143
This United Airlines deal was found by Cheapflights users on 7/15. 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 8/133:52 pm
GRR
- ORD
Nonstop1h 17m
United Airlines
Mon 8/175:59 am
ORD
- GRR
Nonstop1h 17m
United Airlines
Deal found 7/15![United Airlines logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 8/196:40 pm
DTW
- ORD
1 stop14h 13m
Frontier
Wed 8/268:05 am
ORD
- DTW
1 stop8h 17m
Frontier
Deal found 7/15![Frontier logo]()
$162
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 8/206:00 am
DTW
- STL
1 stop12h 22m
Frontier
Sun 8/236:17 pm
STL
- DTW
1 stop18h 22m
Frontier
Deal found 7/15![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 8/216:00 am
DTW
- STL
1 stop12h 22m
Frontier
Mon 8/246:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Deal found 7/16![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Fri 8/286:00 am
DTW
- STL
1 stop12h 22m
Frontier
Mon 8/316:17 pm
STL
- DTW
2 stops17h 27m
Frontier
Deal found 7/18![Frontier logo]()
$164
This American Airlines deal was found by Cheapflights users on 7/15. 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 8/297:41 pm
GRR
- ORD
Nonstop1h 32m
American Airlines
Sat 9/511:59 am
ORD
- GRR
Nonstop1h 05m
American Airlines
Deal found 7/15![American Airlines logo]()
$158
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 July 20, 2026.
Search for one-way flight options from Michigan to Illinois. Find affordable one-way fares based on user searches. Data last updated July 20, 2026.
This Trip.com deal was found by Cheapflights users on 7/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/236:00 am
DTW
- STL
1 stop12h 22m
Frontier
Deal found 7/15![Frontier logo]()
$73
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 8/246:00 am
DTW
- STL
1 stop12h 22m
Frontier
Deal found 7/15![Frontier logo]()
$74
This Kiwi.com deal was found by Cheapflights users on 7/14. 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 10/113:38 pm
DTW
- STL
1 stop19h 02m
Frontier
Deal found 7/14![Frontier logo]()
$75
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 9/56:40 pm
DTW
- STL
1 stop23h 42m
Frontier
Deal found 7/15![Frontier logo]()
$76
This Kiwi.com deal was found by Cheapflights users on 7/15. 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 9/173:34 pm
DTW
- STL
1 stop19h 06m
Frontier
Deal found 7/15![Frontier logo]()
$77
This Trip.com deal was found by Cheapflights users on 7/17. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:00 am
DTW
- STL
1 stop12h 22m
Frontier
Deal found 7/17![Frontier logo]()
$79
This United Airlines deal was found by Cheapflights users on 7/15. 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 8/173:52 pm
GRR
- ORD
Nonstop1h 17m
United Airlines
Deal found 7/15![United Airlines logo]()
$79
This American Airlines deal was found by Cheapflights users on 7/15. 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.
Mon 8/176:57 pm
GRR
- ORD
Nonstop1h 32m
American Airlines
Deal found 7/15![American Airlines logo]()
$80
This Kiwi.com deal was found by Cheapflights users on 7/17. 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 8/132:56 pm
DTW
- STL
1 stop19h 01m
Frontier
Deal found 7/17![Frontier logo]()
$81
This Kiwi.com deal was found by Cheapflights users on 7/16. 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 9/123:34 pm
DTW
- STL
1 stop19h 06m
Frontier
Deal found 7/16![Frontier logo]()
$82
This Kiwi.com deal was found by Cheapflights users on 7/14. 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 9/66:00 am
DTW
- STL
1 stop12h 22m
Frontier
Deal found 7/14![Frontier logo]()
$86
This Delta deal was found by Cheapflights users on 7/15. 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 9/154:00 pm
GRR
- ORD
1 stop5h 30m
Delta
Deal found 7/15![Delta logo]()
$89
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 July 20, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $141 (Kiwi.com) |
One-way from | $73 (Trip.com) |
Popular in | June |
Cheapest in | September |
Average price | $313 |
Good round-trip deal | $143 or less |
Good one-way deal | $87 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 July 20, 2026.
Use the filters below to find and compare flights from Michigan to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Grand RapidsChicago
GRR - ORD
GRRORD
Grand Rapids Gerald R. Ford Intl
Sat 8/8
5:15 am-5:33 am
Nonstop1h 18m
Chicago O'Hare Intl
Tue 8/11
10:49 am-12:58 pm
Nonstop1h 09m
$157
Grand RapidsChicago
GRR - ORD
GRRORD
Grand Rapids Gerald R. Ford Intl
Thu 8/13
7:15 am-7:34 am
Nonstop1h 19m
Chicago O'Hare Intl
Mon 8/17
12:40 pm-2:50 pm
Nonstop1h 10m
$157
Grand RapidsChicago
GRR - ORD
GRRORD
Grand Rapids Gerald R. Ford Intl
Mon 8/17
3:52 pm-4:09 pm
Nonstop1h 17m
Chicago O'Hare Intl
Mon 8/24
6:10 pm-8:17 pm
Nonstop1h 07m
$195
DetroitChicago
DTW - ORD
DTWORD
Detroit Metropolitan Wayne County
Fri 9/18
5:30 pm-10:06 pm
1 stop5h 36m
Chicago O'Hare Intl
Sun 9/20
6:20 am-4:32 pm
1 stop9h 12m
$201
DetroitChicago
DTW - ORD
DTWORD
Detroit Metropolitan Wayne County
Mon 9/21
5:30 pm-10:06 pm
1 stop5h 36m
Chicago O'Hare Intl
Sat 10/3
6:30 am-4:32 pm
1 stop9h 02m
$211
DetroitSt. Louis
DTW - STL
DTWSTL
Detroit Metropolitan Wayne County
Thu 8/6
9:00 am-9:37 am
Nonstop1h 37m
Lambert-St Louis
Mon 8/10
6:25 pm-9:00 pm
Nonstop1h 35m
$217
Quickest round-trip
DetroitChicago
DTW - MDW
DTWMDW
Detroit Metropolitan Wayne County
Sat 9/5
4:45 pm-4:55 pm
Nonstop1h 10m
Chicago Midway
Sun 9/6
6:25 pm-8:35 pm
Nonstop1h 10m
$217
DetroitChicago
DTW - ORD
DTWORD
Detroit Metropolitan Wayne County
Sat 8/29
3:50 pm-4:17 pm
Nonstop1h 27m
Chicago O'Hare Intl
Sat 9/5
6:59 am-9:23 am
Nonstop1h 24m
$217
DetroitChicago
DTW - ORD
DTWORD
Detroit Metropolitan Wayne County
Thu 8/13
7:25 am-7:56 am
Nonstop1h 31m
Chicago O'Hare Intl
Tue 8/18
5:20 pm-7:52 pm
Nonstop1h 32m
$217
DetroitChicago
DTW - MDW
DTWMDW
Detroit Metropolitan Wayne County
Mon 9/28
12:20 pm-12:39 pm
Nonstop1h 19m
Chicago Midway
Mon 9/28
7:01 pm-9:20 pm
Nonstop1h 19m
$217
Showing 1-10 of 60 resultsSorted by cheapest first
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.
DTW-STL
GRR-ORD
DTW-ORD
DTW-RFD
ORD-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
DTW-STL
GRR-ORD
DTW-ORD
DTW-RFD
What is the cheapest month to book a flight from Michigan to Illinois?
Currently, September is the cheapest month in which you can book a flight from Michigan to Illinois (average of $214). Flying from Michigan to Illinois in June is currently the most expensive (average of $344). 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 July 20, 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 in the morning.
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 July 20, 2026.
The most flights from USMI to USIL are scheduled on a Sunday (91 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (71 on average).
How much does it cost to fly round-trip from Michigan to Illinois?
How far ahead should I book a flight from Michigan to Illinois?
To ensure you get the cheapest price possible for a flight from Michigan to Illinois, you should look to book at least 68 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
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 July 18, 2026.
Travelers seeking maximum savings on their Michigan to Illinois flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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 July 20, 2026.
See what other customers who have flown with Denver Air Connection,Southwest, andDelta 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
Crew
9.1
Overall
8.1
Comfort
8.6
Entertainment
7.6
Boarding
8.2
Food
8.2
Denver Air Connection
Denver Air Connection
Crew
9.1
Overall
8.1
Comfort
8.6
Entertainment
7.6
Boarding
8.2
Food
8.2
Denver Air Connection
Crew
9.1
Overall
8.1
Comfort
8.6
Entertainment
7.6
Boarding
8.2
Food
8.2
Denver Air Connection
Crew
9.1
Overall
8.1
Comfort
8.6
Entertainment
7.6
Boarding
8.2
Food
8.2
Denver Air Connection
Crew
9.1
Overall
8.1
Comfort
8.6
Entertainment
7.6
Boarding
8.2
Food
8.2
Denver Air Connection
Crew
9.1
Overall
8.1
Comfort
8.6
Entertainment
7.6
Boarding
8.2
Food
8.2
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 July 20, 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 July 20, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$91 | Average$303 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$97 | Average$313 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$98 | Average$318 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$110 | Average$301 | FlexibilityNo cancel fee | On-time69% |