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$39+ 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 9/17. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — DTW
Aug 22 — Aug 291
Fri 8/22
Fri 8/29
1 adult, Economy
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Cheap flight deals from Illinois to Michigan

Keep the following information in mind while searching for Illinois to Michigan flight deals. Data was last updated August 17, 2025.

Round-trip from

$87
(Southwest)

One-way from

$39
(United Airlines)

Popular in

February

Cheapest in

October

Average price

$211

Good round-trip deal

$109 or less

Good one-way deal

$67 or less
From Illinois to Michigan
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One-way flight from Illinois to Michigan
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Highest demand for flights based on searches. 23% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Illinois to Michigan.
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Price to beat on a one-way flight from Illinois to Michigan.
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Find flight deals from Illinois to Michigan

Cheapest flights from Illinois to Michigan
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 August 17, 2025.

This American Airlines deal was found by Cheapflights users on 8/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/910:01 pmORD - GRR
Nonstop0h 58mAmerican Airlines
Tue 9/167:30 pmGRR - ORD
Nonstop1h 14mAmerican Airlines
Deal found 8/16$91
This American Airlines deal was found by Cheapflights users on 8/17. 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.
Wed 9/107:23 amSTL - ORD
Nonstop1h 22mAmerican Airlines
Wed 9/108:31 pmORD - STL
Nonstop1h 22mAmerican Airlines
Deal found 8/17$91
This American Airlines deal was found by Cheapflights users on 8/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/306:10 amSTL - ORD
Nonstop1h 20mAmerican Airlines
Tue 10/76:45 amORD - STL
Nonstop1h 24mAmerican Airlines
Deal found 8/16$92
This United Airlines deal was found by Cheapflights users on 8/16. 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 9/103:35 pmORD - GRR
Nonstop1h 01mUnited Airlines
Sat 9/137:30 amGRR - ORD
Nonstop1h 11mUnited Airlines
Deal found 8/16$97
This Southwest deal was found by Cheapflights users on 8/15. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/94:35 pmSTL - MDW
Nonstop1h 10mSouthwest
Sat 9/133:55 pmMDW - STL
Nonstop1h 15mSouthwest
Deal found 8/15$97
This Southwest deal was found by Cheapflights users on 8/17. 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 9/164:35 pmSTL - ORD
1 stop4h 55mSouthwest
Tue 9/237:30 amORD - STL
1 stop7h 00mSouthwest
Deal found 8/17$97
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Tue 9/1610:52 amORD - DTW
Nonstop1h 22mUnited Airlines
Tue 9/165:54 pmDTW - ORD
Nonstop1h 27mUnited Airlines
Deal found 8/16$100
This Southwest deal was found by Cheapflights users on 8/17. 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 10/71:50 pmORD - DTW
1 stop7h 55mSouthwest
Tue 10/285:50 amDTW - ORD
1 stop7h 00mSouthwest
Deal found 8/17$102
This Southwest deal was found by Cheapflights users on 8/17. 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 10/71:25 pmMDW - DTW
2 stops8h 20mSouthwest
Tue 10/287:25 pmDTW - MDW
1 stop3h 40mSouthwest
Deal found 8/17$102
This Southwest deal was found by Cheapflights users on 8/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/98:10 amSTL - ORD
1 stop6h 00mSouthwest
Thu 9/111:50 pmORD - STL
1 stop9h 35mSouthwest
Deal found 8/14$102
This Delta deal was found by Cheapflights users on 8/17. 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.
Mon 10/68:55 amORD - DTW
Nonstop1h 21mDelta
Wed 10/87:30 amDTW - ORD
Nonstop1h 20mDelta
Deal found 8/17$104
This American Airlines deal was found by Cheapflights users on 8/17. 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 9/1610:01 pmORD - GRR
Nonstop0h 58mAmerican Airlines
Sat 9/2012:13 pmGRR - ORD
Nonstop1h 11mAmerican Airlines
Deal found 8/17$104

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 August 17, 2025.
Use the filters below to find and compare flights from Illinois to Michigan that are best for you.

Fly from

Illinois

Fly to

Michigan

Route

Depart

Return

Price

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Tue 9/9

10:01 pm-11:59 pm

Nonstop0h 58m

Grand Rapids Gerald R. Ford Intl

Tue 9/16

7:30 pm-7:44 pm

Nonstop1h 14m

$91

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Tue 9/16

4:56 pm-6:59 pm

Nonstop1h 03m

Grand Rapids Gerald R. Ford Intl

Tue 9/23

6:17 pm-6:33 pm

Nonstop1h 16m

$91

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Wed 9/10

6:10 am-7:30 am

Nonstop1h 20m

Chicago O'Hare Intl

Wed 9/10

7:10 pm-8:32 pm

Nonstop1h 22m

$91

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Tue 9/30

7:23 am-8:45 am

Nonstop1h 22m

Chicago O'Hare Intl

Tue 10/7

10:34 pm-11:54 pm

Nonstop1h 20m

$91

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Tue 11/4

6:00 am-7:30 am

Nonstop1h 30m

Chicago O'Hare Intl

Wed 11/19

3:23 pm-4:47 pm

Nonstop1h 24m

$91

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Tue 9/16

6:10 am-7:30 am

Nonstop1h 20m

Chicago O'Hare Intl

Tue 9/23

8:00 am-9:26 am

Nonstop1h 26m

$91

St. LouisChicago

STL - ORD

STLORD

Lambert-St Louis

Wed 10/1

6:10 am-7:30 am

Nonstop1h 20m

Chicago O'Hare Intl

Wed 10/8

6:53 pm-8:26 pm

Nonstop1h 33m

$92

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Sat 9/20

12:58 pm-3:09 pm

Nonstop1h 11m

Grand Rapids Gerald R. Ford Intl

Tue 9/23

6:39 pm-6:50 pm

Nonstop1h 11m

$97

St. LouisChicago

STL - MDW

STLMDW

Lambert-St Louis

Thu 12/11

4:25 pm-5:35 pm

Nonstop1h 10m

Chicago Midway

Wed 12/17

5:15 pm-6:30 pm

Nonstop1h 15m

$97

ChicagoGrand Rapids

ORD - GRR

ORDGRR

Chicago O'Hare Intl

Wed 9/10

3:35 pm-5:36 pm

Nonstop1h 01m

Grand Rapids Gerald R. Ford Intl

Sat 9/13

7:30 am-7:41 am

Nonstop1h 11m

$97

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/16

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Michigan

Have a flexible travel schedule? Discover the best time to fly to Michigan from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Michigan

What is the cheapest month to book a flight from Illinois to Michigan?

Currently, April is the cheapest month in which you can book a flight from Illinois to Michigan (average of $257). Flying from Illinois to Michigan in March is currently the most expensive (average of $305). 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 August 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Michigan as you normally would.

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 August 17, 2025.

The most flights from USIL to USMI are scheduled on a Sunday (79 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (32 on average).

Reviews of airlines servicing Michigan

Get insights into the airlines that provide service to Michigan. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Michigan. Reviews last updated August 17, 2025.
Read through reviews of airlines operating flights from Illinois to Michigan, such as Southwest, Delta, and United Airlines. 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.
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,246 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
8.0
Very good
7,986 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,919 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Spirit Airlines
6.3
Okay
8,038 reviews
Southwest
8.0
Very good
4,246 reviews

Food

7.0

Entertainment

7.5

Crew

8.6

Comfort

8.0

Boarding

8.1

Overall

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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.

  • What are the cheapest airlines to fly from Illinois to Michigan one-way?

    One-way options have recently been found by users for as low as $39 on United Airlines. Other airlines that offer cheap prices include Delta from $46 and American Airlines from $46 one-way.

  • Can I find deals for flights from Illinois to Michigan that include hotel bookings?

    Yes. In addition to deals on Illinois to Michigan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Michigan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Michigan.

  • Can I find deals for business class flights from Illinois to Michigan?

    Yes. Cheapflights offers flight deals from Illinois to Michigan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Michigan?

    Currently, April is the cheapest month in which you can book a flight from Illinois to Michigan (average of $257). Flying from Illinois to Michigan in March is currently the most expensive (average of $305). 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.

See more FAQs

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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.
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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 August 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$37Average$79FlexibilityNo cancel feeOn-time65%
DeltaCheapest$91Average$320FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$91Average$345FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$97Average$365FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$118Average$257FlexibilityNo cancel feeOn-time63%

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