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Cheap flights from Michigan to Illinois from $45

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Michigan to Illinois departing on 3/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Michigan to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
1:12 pm - 2:43 pm
ORD
-
STL
1h 31mnonstop
United Airlines Logo
7:00 pm - 8:35 pm
STL
-
ORD
1h 35mnonstop
$93United Airlines
Sat, Mar 14 - Tue, Mar 17
Southwest Logo
8:15 am - 9:35 am
MDW
-
STL
1h 20mnonstop
Southwest Logo
10:30 am - 11:40 am
STL
-
MDW
1h 10mnonstop
$97Southwest
Wed, Mar 25 - Wed, Apr 1
American Airlines Logo
8:53 pm - 10:17 pm
ORD
-
STL
1h 24mnonstop
American Airlines Logo
7:05 am - 8:36 am
STL
-
ORD
1h 31mnonstop
$135American Airlines
Thu, Apr 9 - Sat, Apr 11
American Airlines Logo
7:47 pm - 9:12 pm
ORD
-
STL
1h 25mnonstop
American Airlines Logo
8:00 am - 9:31 am
STL
-
ORD
1h 31mnonstop
$136American Airlines
Sat, Mar 7 - Mon, Mar 9
Frontier Logo
12:22 pm - 6:51 am
MDW
-
STL
18h 29m
1 stop
Frontier Logo
8:22 pm - 7:07 pm
STL
-
MDW
22h 45m
1 stop
$142Frontier
Thu, Feb 19 - Mon, Feb 23
Multiple Airlines Logo
2:35 pm - 6:51 am
DTW
-
STL
17h 16m
1 stop
Multiple Airlines Logo
11:27 am - 10:37 pm
STL
-
DTW
10h 10m
1 stop
$142Multiple Airlines
Tue, Mar 3 - Tue, Mar 31
Frontier Logo
6:00 am - 6:51 am
MDW
-
STL
24h 51m
1 stop
Frontier Logo
8:17 pm - 4:16 pm
STL
-
MDW
19h 59m
1 stop
$152Frontier
Sun, Feb 22 - Wed, Feb 25
Multiple Airlines Logo
9:02 am - 10:39 pm
DTW
-
ORD
14h 37m
1 stop
Multiple Airlines Logo
6:51 pm - 7:49 am
ORD
-
DTW
11h 58m
1 stop
$152Multiple Airlines
Sun, Mar 8 - Mon, Mar 9
Delta Logo
10:49 am - 1:17 pm
GRR
-
ORD
3h 28m
1 stop
Delta Logo
1:57 pm - 5:47 pm
ORD
-
GRR
2h 50m
1 stop
$191Delta
Tue, Mar 24 - Wed, Mar 25
Delta Logo
5:58 pm - 8:22 pm
MBS
-
ORD
3h 24m
1 stop
Delta Logo
5:40 pm - 10:23 pm
ORD
-
MBS
3h 43m
1 stop
$199Delta
Sat, Apr 11 - Sun, Apr 12

United Airlines flights from Michigan to Illinois

Our best United Airlines deals on Michigan to Illinois flight tickets
United Airlines
Mar 14
ORD1:12 pmChicago O'Hare Intl
1h 31m
STL2:43 pmLambert-St Louis
Mar 17
STL7:00 pmLambert-St Louis
1h 35m
ORD8:35 pmChicago O'Hare Intl
$93
United Airlines
Mar 14
ORD1:12 pmChicago O'Hare Intl
1h 31m
STL2:43 pmLambert-St Louis
Mar 16
STL7:00 pmLambert-St Louis
1h 35m
ORD8:35 pmChicago O'Hare Intl
$130
United Airlines
Mar 28
ORD9:33 pmChicago O'Hare Intl
1h 26m
STL10:59 pmLambert-St Louis
Apr 1
STL8:21 amLambert-St Louis
1h 29m
ORD9:50 amChicago O'Hare Intl
$144

American Airlines flights from Michigan to Illinois

Our best American Airlines deals on Michigan to Illinois flight tickets
American Airlines
Apr 9
ORD8:53 pmChicago O'Hare Intl
1h 24m
STL10:17 pmLambert-St Louis
Apr 11
STL7:05 amLambert-St Louis
1h 31m
ORD8:36 amChicago O'Hare Intl
$135
American Airlines
Mar 7
ORD7:47 pmChicago O'Hare Intl
1h 25m
STL9:12 pmLambert-St Louis
Mar 9
STL8:00 amLambert-St Louis
1h 31m
ORD9:31 amChicago O'Hare Intl
$136
American Airlines
Feb 28
ORD12:28 pmChicago O'Hare Intl
1h 22m
STL1:50 pmLambert-St Louis
Mar 2
STL9:37 amLambert-St Louis
1h 22m
ORD10:59 amChicago O'Hare Intl
$137

momondo 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, momondo users made 832,500 searches. Data last updated February 9, 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

Price

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 3/14

1:12 pm-2:43 pm

Nonstop1h 31m

Lambert-St Louis

Tue 3/17

7:00 pm-8:35 pm

Nonstop1h 35m

$93

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Wed 3/25

8:15 am-9:35 am

Nonstop1h 20m

Lambert-St Louis

Wed 4/1

10:30 am-11:40 am

Nonstop1h 10m

$97

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Thu 4/9

8:53 pm-10:17 pm

Nonstop1h 24m

Lambert-St Louis

Sat 4/11

7:05 am-8:36 am

Nonstop1h 31m

$135

ChicagoSt. Louis

ORD - STL

ORDSTL

Chicago O'Hare Intl

Sat 3/7

7:47 pm-9:12 pm

Nonstop1h 25m

Lambert-St Louis

Mon 3/9

8:00 am-9:31 am

Nonstop1h 31m

$136

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Thu 2/19

12:22 pm-6:51 am

1 stop18h 29m

Lambert-St Louis

Mon 2/23

8:22 pm-7:07 pm

1 stop22h 45m

$142

DetroitSt. Louis

DTW - STL

DTWSTL

Detroit Metropolitan Wayne County

Tue 3/3

2:35 pm-6:51 am

1 stop17h 16m

Lambert-St Louis

Tue 3/31

11:27 am-10:37 pm

1 stop10h 10m

$142

ChicagoSt. Louis

MDW - STL

MDWSTL

Chicago Midway

Sun 2/22

6:00 am-6:51 am

1 stop24h 51m

Lambert-St Louis

Wed 2/25

8:17 pm-4:16 pm

1 stop19h 59m

$152

DetroitChicago

DTW - ORD

DTWORD

Detroit Metropolitan Wayne County

Sun 3/8

9:02 am-10:39 pm

1 stop14h 37m

Chicago O'Hare Intl

Mon 3/9

6:51 pm-7:49 am

1 stop11h 58m

$152

Grand RapidsChicago

GRR - ORD

GRRORD

Grand Rapids Gerald R. Ford Intl

Tue 3/24

10:49 am-1:17 pm

1 stop3h 28m

Chicago O'Hare Intl

Wed 3/25

1:57 pm-5:47 pm

1 stop2h 50m

$191

Bay CityChicago

MBS - ORD

MBSORD

Bay City MBS Intl

Sat 4/11

5:58 pm-8:22 pm

1 stop3h 24m

Chicago O'Hare Intl

Sun 4/12

5:40 pm-10:23 pm

1 stop3h 43m

$199

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

How to get the cheapest flight ticket from Michigan to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Michigan is in September. Flight prices, which tend to average around $151, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $161.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Michigan to Illinois is on a Thursday when prices can be found for as low as $534. Flights from Michigan to Illinois on a Monday will generally be more expensive and average around $721. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the morning. Flights from Michigan to Illinois during this time can be as low as $509. Flights at noon are often more expensive with an average ticket price of $859.

What is the cheapest Michigan to Illinois flight route?

Fly from Detroit Metropolitan Wayne County to Chicago Midway for the best Michigan - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Michigan when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $269 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Michigan for as low as $111 on momondo.

What cabin class options are available on Michigan to Illinois flights?

There are 4 cabin classes available to choose from on Michigan to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Michigan to Illinois flights?

No. A direct flight is the cheapest option for a flight between Michigan to Illinois.

Cheap Michigan to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Michigan to Illinois

Best Price Found

$49

Fastest flight time

0h 50m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from Michigan in the past 72 hours is $49. The best round-trip flight deal from Michigan to Illinois found on momondo in the last 72 hours is $87.
The fastest flight from Michigan to Illinois takes 0h 50m
Direct flights go from Michigan to Illinois every day.
There are 98 airports in Illinois. From Michigan there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW), Lambert-St Louis (STL).
Search flight deals

  • When did momondo last update prices for flights from Michigan to Illinois?

    Prices for flights from Michigan to Illinois were last updated today.

  • How many operators does momondo search for flights from Michigan to Illinois?

  • How old do you have to be to fly from Michigan to Illinois?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Michigan to Illinois.

  • What documentation or ID do you need to fly to Illinois?

    The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Michigan to Illinois?

Best airlines flying from Michigan to Illinois

Compare and see reviews for airlines that fly from Michigan to Illinois with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $91Free CancellationRating
7.2
11,254 reviews
Search American Airlines flights
DeltaPriceFrom $92Free CancellationRating
7.9
8,173 reviews
Search Delta flights
United AirlinesPriceFrom $94Free CancellationRating
7.4
9,257 reviews
Search United Airlines flights
SouthwestPriceFrom $97Free CancellationRating
8.0
4,282 reviews
Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Michigan to Illinois?

It is quick and easy to find Michigan to Illinois flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Illinois that suits you.

Can I find flights from Michigan to Illinois with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Illinois from Michigan with this policy.

How can momondo help me find flights from Michigan to Illinois?

momondo helps you find the best flight between Michigan and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Michigan to Illinois right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Michigan to Illinois flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

An easier way to manage your Illinois trip

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Find better results for your trip to Illinois

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