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Illinois

$28+ 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 8/7. Fares are subject to change and may not be available on all flights or dates of travel.
DTW — ORD
Jul 6 — Jul 131
Sun 7/6
Sun 7/13
1 adult, Economy
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Cheap 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 1, 2025.

Round-trip from

$61
(Booking.com)

One-way from

$28
(FlightHub)

Popular in

June

Cheapest in

October

Average price

$275

Good round-trip deal

$118 or less

Good one-way deal

$60 or less
From Michigan to Illinois
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One-way flight from Michigan to Illinois
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Highest demand for flights based on searches. 27% potential increase in price ($80 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Michigan to Illinois.
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Price to beat on a one-way flight from Michigan to Illinois.
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Find flight deals from Michigan to Illinois

Cheapest flights from Michigan to Illinois
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 1, 2025.

This Booking.com deal was found by Cheapflights users on 6/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/79:20 amDTW - STL
Nonstop1h 32mSpirit Airlines
Mon 8/1110:47 amSTL - DTW
Nonstop1h 29mSpirit Airlines
Deal found 6/30$61
This Southwest deal was found by Cheapflights users on 6/30. 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 7/302:00 pmMDW - STL
Nonstop1h 10mSouthwest
Wed 8/611:35 amSTL - MDW
Nonstop1h 05mSouthwest
Deal found 6/30$91
This American Airlines deal was found by Cheapflights users on 6/30. 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 7/297:31 pmGRR - ORD
Nonstop1h 08mAmerican Airlines
Tue 8/57:14 amORD - GRR
Nonstop1h 12mAmerican Airlines
Deal found 6/30$91
This American Airlines deal was found by Cheapflights users on 6/30. 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 7/3010:36 pmORD - STL
Nonstop1h 15mAmerican Airlines
Sat 8/27:23 amSTL - ORD
Nonstop1h 23mAmerican Airlines
Deal found 6/30$91
This Priceline deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/179:36 amDTW - STL
1 stop4h 58mMultiple Airlines
Sun 7/2010:47 amSTL - DTW
Nonstop1h 29mMultiple Airlines
Deal found 6/30$93
This Priceline deal was found by Cheapflights users on 6/28. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/295:10 amORD - STL
1 stop7h 46mFrontier
Mon 9/12:01 pmSTL - ORD
1 stop9h 53mFrontier
Deal found 6/28$112
This Southwest deal was found by Cheapflights users on 6/30. 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 8/162:55 pmORD - STL
1 stop5h 35mSouthwest
Mon 8/185:10 amSTL - ORD
1 stop5h 35mSouthwest
Deal found 6/30$114
This Delta deal was found by Cheapflights users on 6/30. 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 9/128:55 amDTW - STL
Nonstop1h 38mDelta
Sun 9/146:40 amSTL - DTW
Nonstop1h 33mDelta
Deal found 6/30$119
This American Airlines deal was found by Cheapflights users on 6/30. 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 8/45:00 amDTW - ORD
Nonstop1h 28mAmerican Airlines
Fri 8/226:45 amORD - DTW
Nonstop1h 27mAmerican Airlines
Deal found 6/30$124
This Southwest deal was found by Cheapflights users on 7/1. 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 8/115:40 amDTW - MDW
2 stops8h 50mSouthwest
Wed 8/131:00 pmMDW - DTW
2 stops8h 15mSouthwest
Deal found 7/1$124
This United Airlines deal was found by Cheapflights users on 7/1. 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 8/12:23 pmORD - STL
Nonstop1h 24mUnited Airlines
Mon 8/45:00 amSTL - ORD
Nonstop1h 30mUnited Airlines
Deal found 7/1$124
This Delta deal was found by Cheapflights users on 6/30. 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 8/212:30 pmDTW - ORD
Nonstop1h 20mDelta
Mon 8/49:00 amORD - DTW
Nonstop1h 20mDelta
Deal found 6/30$134

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 1, 2025.
Use the filters below to find and compare flights from Michigan to Illinois that are best for you.

Fly from

Michigan

Fly to

Illinois

Route

Depart

Return

Price

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 8/7

9:20 am-9:52 am

Nonstop1h 32m

Lambert-St Louis

Mon 8/11

10:47 am-1:16 pm

Nonstop1h 29m

$61

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 7/30

2:00 pm-3:10 pm

Nonstop1h 10m

Lambert-St Louis

Wed 8/6

11:35 am-12:40 pm

Nonstop1h 05m

$91

Grand RapidsChicago

GRR - ORD

GRRORD

Grand Rapids Gerald R. Ford Intl

Tue 7/29

7:31 pm-7:39 pm

Nonstop1h 08m

Chicago O'Hare Intl

Tue 8/5

7:14 am-9:26 am

Nonstop1h 12m

$91

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Wed 7/30

10:36 pm-11:51 pm

Nonstop1h 15m

Lambert-St Louis

Sat 8/2

7:23 am-8:46 am

Nonstop1h 23m

$91

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 7/17

9:36 am-1:34 pm

1 stop4h 58m

Lambert-St Louis

Sun 7/20

10:47 am-1:16 pm

Nonstop1h 29m

$93

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 8/29

5:10 am-12:56 pm

1 stop7h 46m

Lambert-St Louis

Mon 9/1

2:01 pm-11:54 pm

1 stop9h 53m

$112

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 8/16

2:55 pm-8:30 pm

1 stop5h 35m

Lambert-St Louis

Mon 8/18

5:10 am-10:45 am

1 stop5h 35m

$114

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Thu 8/21

8:55 am-9:32 am

Nonstop1h 37m

Lambert-St Louis

Thu 8/21

2:15 pm-4:49 pm

Nonstop1h 34m

$119

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Fri 8/1

2:23 pm-3:47 pm

Nonstop1h 24m

Lambert-St Louis

Mon 8/4

5:00 am-6:30 am

Nonstop1h 30m

$124

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Mon 8/4

5:00 am-5:28 am

Nonstop1h 28m

Chicago O'Hare Intl

Fri 8/22

6:45 am-9:12 am

Nonstop1h 27m

$124

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/29

Showing 1-10 of 60 results
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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.
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

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

Currently, August is the cheapest month in which you can book a flight from Michigan to Illinois (average of $245). Flying from Michigan to Illinois in March is currently the most expensive (average of $321). 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 1, 2025.

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

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 1, 2025.

The most flights from USMI to USIL are scheduled on a Tuesday (87 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (21 on average).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated July 1, 2025.
See what other customers who have flown with Southwest, Delta, and United Airlines from Michigan to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,273 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Southwest
8.0
Very good
4,273 reviews
Southwest
8.0
Very good
4,273 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
Delta
8.0
Very good
7,973 reviews
Southwest
8.0
Very good
4,273 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
United Airlines
7.4
Good
8,858 reviews
Southwest
8.0
Very good
4,273 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
JetBlue
7.3
Good
2,919 reviews
Southwest
8.0
Very good
4,273 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,273 reviews

Comfort

8.0

Entertainment

7.6

Overall

8.0

Boarding

8.2

Crew

8.6

Food

7.0

Reviews

1 / 20
8.0
Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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.

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

    To fly one-way, consider booking your trip with Spirit Airlines, which is currently one of the cheapest options available, starting at $28. Southwest flights start at $46 while deals on United Airlines start at $46 one-way.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Michigan to Illinois 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 Michigan to Illinois?

    Currently, August is the cheapest month in which you can book a flight from Michigan to Illinois (average of $245). Flying from Michigan to Illinois in March is currently the most expensive (average of $321). 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

Browse thousands of different 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.
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Top 5 airlines flying from Michigan to Illinois

Discover the top 5 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 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$38Average$81FlexibilityNo cancel feeOn-time65%
DeltaCheapest$97Average$258FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$97Average$301FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$105Average$404FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$108Average$268FlexibilityNo cancel feeOn-time63%

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