$59+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DTW
Aug 28 — Sep 41
Round-trip
1 adult, Economy
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Find cheap flights from Illinois to Michigan with Cheapflights
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Cheapest flights from Illinois to MichiganExplore the most affordable flight options available from Illinois to Michigan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2026.
Explore the most affordable flight options available from Illinois to Michigan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 29, 2026.
This Southwest deal was found by Cheapflights users on 7/29. 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 8/206:15 pm
STL
- MDW
Nonstop1h 05m
Southwest
Mon 8/247:55 am
MDW
- STL
Nonstop1h 20m
Southwest
Deal found 7/29![Southwest logo]()
$117
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:54 pm
STL
- ORD
Nonstop1h 36m
United Airlines
Tue 9/12:07 pm
ORD
- STL
Nonstop1h 31m
United Airlines
Deal found 7/28![United Airlines logo]()
$117
This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:00 am
STL
- ORD
Nonstop1h 34m
American Airlines
Mon 8/247:00 am
ORD
- STL
Nonstop1h 24m
American Airlines
Deal found 7/27![American Airlines logo]()
$118
This American Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1011:01 am
STL
- ORD
Nonstop1h 28m
American Airlines
Fri 9/1111:05 pm
ORD
- STL
Nonstop1h 22m
American Airlines
Deal found 7/27![American Airlines logo]()
$122
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:25 am
STL
- MDW
Nonstop1h 05m
Southwest
Mon 9/76:20 am
MDW
- STL
1 stop3h 10m
Southwest
Deal found 7/28![Southwest logo]()
$127
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Mon 8/316:00 am
DTW
- STL
1 stop12h 22m
Frontier
Deal found 7/27![Frontier logo]()
$131
This Southwest deal was found by Cheapflights users on 7/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:20 pm
STL
- MDW
Nonstop1h 05m
Southwest
Sat 8/299:55 am
MDW
- STL
2 stops6h 45m
Southwest
Deal found 7/26![Southwest logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 9/36:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Sun 9/273:25 pm
DTW
- STL
1 stop22h 45m
Frontier
Deal found 7/26![Frontier logo]()
$134
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Fri 9/112:29 pm
STL
- DTW
1 stop9h 13m
Frontier
Mon 9/147:00 am
DTW
- STL
1 stop7h 10m
Frontier
Deal found 7/26![Frontier logo]()
$137
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Fri 9/46:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Sun 9/273:25 pm
DTW
- STL
1 stop22h 45m
Frontier
Deal found 7/26![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Mon 9/282:29 pm
STL
- DTW
1 stop9h 13m
Frontier
Wed 9/306:50 am
DTW
- STL
1 stop7h 20m
Frontier
Deal found 7/26![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/92:29 pm
STL
- DTW
1 stop7h 17m
Frontier
Fri 9/117:00 am
DTW
- STL
1 stop7h 10m
Frontier
Deal found 7/27![Frontier logo]()
$148
Best flights from Illinois to MichiganDiscover carefully curated flight deals from Illinois to Michigan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2026.
Discover carefully curated flight deals from Illinois to Michigan that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2026.
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:50 pm
STL
- MDW
Nonstop1h 05m
Southwest
Mon 9/288:55 pm
MDW
- STL
Nonstop1h 15m
Southwest
Deal found 7/28![Southwest logo]()
$117
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:54 pm
STL
- ORD
Nonstop1h 36m
United Airlines
Mon 8/3110:29 am
ORD
- STL
Nonstop1h 33m
United Airlines
Deal found 7/28![United Airlines logo]()
$117
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2611:20 am
STL
- ORD
1 stop5h 21m
Delta
Wed 12/168:29 am
ORD
- STL
1 stop4h 54m
Delta
Deal found 7/28![Delta logo]()
$157
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:30 am
STL
- MDW
Nonstop1h 05m
Southwest
Tue 9/14:40 pm
MDW
- STL
Nonstop1h 15m
Southwest
Deal found 7/28![Southwest logo]()
$117
This American Airlines deal was found by Cheapflights users on 7/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1710:05 pm
ORD
- FNT
Nonstop1h 20m
American Airlines
Sun 9/205:59 pm
FNT
- ORD
Nonstop1h 44m
American Airlines
Deal found 7/24![American Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 7/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/110:25 am
STL
- MDW
1 stop4h 00m
Southwest
Tue 9/18:30 pm
MDW
- STL
Nonstop1h 10m
Southwest
Deal found 7/26![Southwest logo]()
$127
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/76:15 pm
STL
- MDW
Nonstop1h 05m
Southwest
Mon 9/144:25 pm
MDW
- STL
1 stop3h 30m
Southwest
Deal found 7/27![Southwest logo]()
$127
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:10 pm
ORD
- GRR
Nonstop1h 07m
United Airlines
Tue 9/17:15 am
GRR
- ORD
Nonstop1h 19m
United Airlines
Deal found 7/28![United Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 7/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/172:10 pm
STL
- ORD
1 stop4h 19m
Delta
Mon 8/241:59 pm
ORD
- STL
1 stop6h 43m
Delta
Deal found 7/26![Delta logo]()
$157
This Southwest deal was found by Cheapflights users on 7/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/103:00 pm
STL
- MDW
1 stop4h 40m
Southwest
Tue 10/139:40 am
MDW
- STL
Nonstop1h 10m
Southwest
Deal found 7/24![Southwest logo]()
$127
This United Airlines deal was found by Cheapflights users on 7/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/2410:49 am
ORD
- GRR
Nonstop1h 09m
United Airlines
Mon 8/313:52 pm
GRR
- ORD
Nonstop1h 17m
United Airlines
Deal found 7/25![United Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 7/25. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:30 am
STL
- ORD
1 stop4h 12m
Delta
Tue 8/181:59 pm
ORD
- STL
1 stop6h 43m
Delta
Deal found 7/25![Delta logo]()
$157
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1611:00 am
STL
- MDW
Nonstop1h 10m
Southwest
Thu 11/191:55 pm
MDW
- STL
1 stop4h 55m
Southwest
Deal found 7/28![Southwest logo]()
$127
This United Airlines deal was found by Cheapflights users on 7/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/812:40 pm
ORD
- GRR
Nonstop1h 10m
United Airlines
Tue 9/1510:10 am
GRR
- ORD
Nonstop1h 19m
United Airlines
Deal found 7/25![United Airlines logo]()
$157
This Delta deal was found by Cheapflights users on 7/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/94:10 pm
STL
- ORD
1 stop4h 20m
Delta
Wed 9/167:05 am
ORD
- STL
1 stop6h 01m
Delta
Deal found 7/26![Delta logo]()
$157
This Southwest deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/58:25 am
STL
- MDW
Nonstop1h 05m
Southwest
Mon 9/76:20 am
MDW
- STL
1 stop3h 10m
Southwest
Deal found 7/27![Southwest logo]()
$127
This Delta deal was found by Cheapflights users on 7/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/86:40 am
STL
- ORD
1 stop6h 19m
Delta
Tue 9/151:55 pm
ORD
- STL
1 stop6h 40m
Delta
Deal found 7/24![Delta logo]()
$167
This Southwest deal was found by Cheapflights users on 7/25. 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 8/1510:10 am
STL
- MDW
1 stop4h 10m
Southwest
Tue 8/183:10 pm
MDW
- STL
1 stop5h 30m
Southwest
Deal found 7/25![Southwest logo]()
$137
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/77:04 pm
STL
- ORD
Nonstop1h 27m
United Airlines
Fri 12/113:25 pm
ORD
- STL
Nonstop1h 31m
United Airlines
Deal found 7/27![United Airlines logo]()
$183
This Delta deal was found by Cheapflights users on 7/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/1510:33 am
STL
- ORD
1 stop5h 44m
Delta
Mon 8/171:41 pm
ORD
- STL
1 stop7h 01m
Delta
Deal found 7/24![Delta logo]()
$167
This American Airlines deal was found by Cheapflights users on 7/29. 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 10/142:35 pm
ORD
- FNT
Nonstop1h 31m
American Airlines
Wed 10/215:36 pm
FNT
- ORD
Nonstop1h 38m
American Airlines
Deal found 7/29![American Airlines logo]()
$249
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/53:00 pm
STL
- MDW
1 stop4h 40m
Southwest
Tue 9/88:55 am
MDW
- STL
1 stop4h 00m
Southwest
Deal found 7/28![Southwest logo]()
$137
This American Airlines deal was found by Cheapflights users on 7/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3110:35 pm
ORD
- FNT
Nonstop1h 18m
American Airlines
Mon 9/76:25 am
FNT
- ORD
Nonstop1h 34m
American Airlines
Deal found 7/25![American Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/127:05 am
ORD
- GRR
1 stop5h 53m
Delta
Sat 9/194:00 pm
GRR
- ORD
1 stop5h 30m
Delta
Deal found 7/28![Delta logo]()
$177
This American Airlines deal was found by Cheapflights users on 7/24. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2110:35 pm
ORD
- FNT
Nonstop1h 18m
American Airlines
Fri 8/285:45 pm
FNT
- ORD
Nonstop1h 44m
American Airlines
Deal found 7/24![American Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 7/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/81:55 pm
ORD
- GRR
1 stop4h 04m
Delta
Tue 9/156:00 pm
GRR
- ORD
1 stop3h 30m
Delta
Deal found 7/26![Delta logo]()
$177
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/89:30 pm
ORD
- DTW
Nonstop1h 22m
United Airlines
Sat 12/126:00 pm
DTW
- ORD
Nonstop1h 21m
United Airlines
Deal found 7/27![United Airlines logo]()
$217
This American Airlines deal was found by Cheapflights users on 7/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/93:04 pm
ORD
- FNT
Nonstop1h 25m
American Airlines
Wed 9/165:32 am
FNT
- ORD
Nonstop1h 27m
American Airlines
Deal found 7/26![American Airlines logo]()
$249
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:20 pm
ORD
- GRR
1 stop5h 35m
Delta
Tue 9/15:30 am
GRR
- ORD
1 stop3h 26m
Delta
Deal found 7/28![Delta logo]()
$177
This United Airlines deal was found by Cheapflights users on 7/24. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/302:30 pm
ORD
- DTW
Nonstop1h 30m
United Airlines
Wed 9/25:25 am
DTW
- ORD
Nonstop1h 30m
United Airlines
Deal found 7/24![United Airlines logo]()
$222
Last-minute flights from Illinois to MichiganDiscover last-minute flight deals from Illinois to Michigan. Data last updated July 29, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Michigan. Data last updated July 29, 2026 and is based on user searches.
This Southwest deal was found by Cheapflights users on 7/25. 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 8/157:50 am
STL
- MDW
2 stops5h 30m
Southwest
Tue 8/186:00 am
MDW
- STL
1 stop4h 55m
Southwest
Deal found 7/25![Southwest logo]()
$159
This Southwest deal was found by Cheapflights users on 7/29. 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 8/206:15 pm
STL
- MDW
Nonstop1h 05m
Southwest
Mon 8/247:55 am
MDW
- STL
Nonstop1h 20m
Southwest
Deal found 7/29![Southwest logo]()
$117
This American Airlines deal was found by Cheapflights users on 7/29. 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 8/206:00 am
STL
- ORD
Nonstop1h 34m
American Airlines
Mon 8/2411:00 pm
ORD
- STL
Nonstop1h 14m
American Airlines
Deal found 7/29![American Airlines logo]()
$118
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/205:59 am
ORD
- GRR
Nonstop1h 17m
United Airlines
Sat 8/224:44 pm
GRR
- ORD
Nonstop1h 21m
United Airlines
Deal found 7/27![United Airlines logo]()
$157
This American Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/206:58 am
ORD
- GRR
Nonstop1h 12m
American Airlines
Mon 8/246:57 pm
GRR
- ORD
Nonstop1h 32m
American Airlines
Deal found 7/28![American Airlines logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Fri 8/216:17 pm
STL
- DTW
1 stop14h 03m
Frontier
Sun 8/238:46 pm
DTW
- STL
1 stop21h 36m
Frontier
Deal found 7/26![Frontier logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/246:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Mon 8/316:00 am
DTW
- STL
1 stop12h 22m
Frontier
Deal found 7/27![Frontier logo]()
$131
This United Airlines deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/256:54 pm
STL
- ORD
Nonstop1h 36m
United Airlines
Tue 9/12:07 pm
ORD
- STL
Nonstop1h 31m
United Airlines
Deal found 7/28![United Airlines logo]()
$117
This Delta deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/252:10 pm
STL
- ORD
1 stop6h 20m
Delta
Mon 8/311:59 pm
ORD
- STL
1 stop6h 43m
Delta
Deal found 7/28![Delta logo]()
$157
This Southwest deal was found by Cheapflights users on 7/26. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:20 pm
STL
- MDW
Nonstop1h 05m
Southwest
Sat 8/299:55 am
MDW
- STL
2 stops6h 45m
Southwest
Deal found 7/26![Southwest logo]()
$132
This Kiwi.com deal was found by Cheapflights users on 7/25. 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 8/286:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Mon 8/316:00 am
DTW
- STL
1 stop12h 22m
Frontier
Deal found 7/25![Frontier logo]()
$159
This Kiwi.com deal was found by Cheapflights users on 7/25. 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 8/286:17 pm
STL
- DTW
1 stop14h 03m
Frontier
Sun 8/308:46 pm
DTW
- STL
1 stop21h 36m
Frontier
Deal found 7/25![Frontier logo]()
$163
One-way flights from Illinois to MichiganSearch for one-way flight options from Illinois to Michigan. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
Search for one-way flight options from Illinois to Michigan. Find affordable one-way fares based on user searches. Data last updated July 29, 2026.
This Southwest deal was found by Cheapflights users on 7/24. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/155:45 am
STL
- MDW
Nonstop1h 05m
Southwest
Deal found 7/24![Southwest logo]()
$59
This American Airlines deal was found by Cheapflights users on 7/25. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/111:01 am
STL
- ORD
Nonstop1h 28m
American Airlines
Deal found 7/25![American Airlines logo]()
$59
This American Airlines deal was found by Cheapflights users on 7/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:07 pm
STL
- ORD
Nonstop1h 33m
American Airlines
Deal found 7/26![American Airlines logo]()
$60
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 8/316:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Deal found 7/29![Frontier logo]()
$62
This United Airlines deal was found by Cheapflights users on 7/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/118:00 am
STL
- ORD
Nonstop1h 34m
United Airlines
Deal found 7/26![United Airlines logo]()
$64
This Kiwi.com deal was found by Cheapflights users on 7/29. 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 9/76:17 pm
STL
- DTW
1 stop14h 03m
Frontier
Deal found 7/29![Frontier logo]()
$65
This Trip.com deal was found by Cheapflights users on 7/25. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/142:29 pm
STL
- DTW
1 stop9h 13m
Frontier
Deal found 7/25![Frontier logo]()
$68
This Kiwi.com deal was found by Cheapflights users on 7/25. 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.
Thu 9/36:17 pm
STL
- DTW
1 stop5h 47m
Frontier
Deal found 7/25![Frontier logo]()
$69
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Mon 9/282:29 pm
STL
- DTW
1 stop9h 13m
Frontier
Deal found 7/26![Frontier logo]()
$70
This Kiwi.com deal was found by Cheapflights users on 7/26. 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.
Mon 11/1610:35 am
STL
- DTW
1 stop27h 04m
Frontier
Deal found 7/26![Frontier logo]()
$71
This Kiwi.com deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2210:35 am
STL
- DTW
1 stop27h 08m
Frontier
Deal found 7/27![Frontier logo]()
$72
This Trip.com deal was found by Cheapflights users on 7/29. 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 10/22:29 pm
STL
- DTW
1 stop9h 13m
Frontier
Deal found 7/29![Frontier logo]()
$73
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 July 29, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $117 (Southwest) |
One-way from | $59 (Southwest) |
Popular in | March |
Cheapest in | October |
Average price | $452 |
Good round-trip deal | $109 or less |
Good one-way deal | $54 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 July 29, 2026.
Use the filters below to find and compare flights from Illinois to Michigan that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Tue 9/22
12:50 pm-1:55 pm
Nonstop1h 05m
Chicago Midway
Mon 9/28
8:55 pm-10:10 pm
Nonstop1h 15m
$117
St. LouisChicago
STL - ORD
STLORD
Lambert-St Louis
Tue 8/25
6:54 pm-8:30 pm
Nonstop1h 36m
Chicago O'Hare Intl
Mon 8/31
10:29 am-12:02 pm
Nonstop1h 33m
$117
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Tue 8/25
6:30 am-7:35 am
Nonstop1h 05m
Chicago Midway
Tue 9/1
4:40 pm-5:55 pm
Nonstop1h 15m
$117
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Tue 9/1
10:25 am-2:25 pm
1 stop4h 00m
Chicago Midway
Tue 9/1
8:30 pm-9:40 pm
Nonstop1h 10m
$127
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Mon 9/7
6:15 pm-7:20 pm
Nonstop1h 05m
Chicago Midway
Mon 9/14
4:25 pm-7:55 pm
1 stop3h 30m
$127
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Sat 10/10
3:00 pm-7:40 pm
1 stop4h 40m
Chicago Midway
Tue 10/13
9:40 am-10:50 am
Nonstop1h 10m
$127
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Mon 11/16
11:00 am-12:10 pm
Nonstop1h 10m
Chicago Midway
Thu 11/19
1:55 pm-6:50 pm
1 stop4h 55m
$127
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Sat 9/5
8:25 am-9:30 am
Nonstop1h 05m
Chicago Midway
Mon 9/7
6:20 am-9:30 am
1 stop3h 10m
$127
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Sat 8/15
10:10 am-2:20 pm
1 stop4h 10m
Chicago Midway
Tue 8/18
3:10 pm-8:40 pm
1 stop5h 30m
$137
St. LouisChicago
STL - MDW
STLMDW
Lambert-St Louis
Sat 9/5
3:00 pm-7:40 pm
1 stop4h 40m
Chicago Midway
Tue 9/8
8:55 am-12:55 pm
1 stop4h 00m
$137
Showing 1-10 of 60 resultsSorted by cheapest first
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.
STL-MDW
STL-ORD
STL-DTW
ORD-FNT
ORD-GRR
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
USIL-USMI
STL-MDW
STL-ORD
STL-DTW
ORD-FNT
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 $242). Flying from Illinois to Michigan in April is currently the most expensive (average of $441). 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 July 29, 2026.
One of the essential ways to save on airfare from Illinois to Michigan is to remain as flexible as possible. Flights that are at noon tend to be the most expensive. A flight in the morning could potentially save you up to 20% on airfare.
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 July 29, 2026.
The most flights from USIL to USMI are scheduled on a Tuesday (91 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (38 on average).
How much does it cost to fly round-trip from Illinois to Michigan?
Airfare is typical for this route at the moment.
Illinois to Michigan flights typically cost between $178 and $437 in September.The cheapest round-trip price found within the last 5 days was $217 on United Airlines (Sep 8-Sep 15).
How far ahead should I book a flight from Illinois to Michigan?
The best time to book flights from Illinois to Michigan is 48 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
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 July 25, 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. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 July 29, 2026.
Read through reviews of airlines operating flights from Illinois to Michigan, such as Southwest,Delta, andContour. 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.
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
Entertainment
7.5
Overall
8.0
Comfort
8.0
Crew
8.6
Food
7.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentSarah,Aug 2024
MDW - AUS
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.
Complete your trip
Complete your trip to Michigan by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Illinois to Michigan by cabin class
Find flights from Illinois to Michigan, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Illinois and Michigan flights
Browse other Illinois and Michigan flight options. Last updated on July 29, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Find a return flight route from Michigan
Find the right flight back to Illinois after your stay in Michigan
Illinois to Michigan flights
Consider these flights traveling from Illinois to Michigan.
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 July 29, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$97 | Average$370 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$121 | Average$346 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$121 | Average$336 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$137 | Average$365 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$144 | Average$178 | FlexibilityNo cancel fee | On-time62% |