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$49 Find cheap flights from Illinois to Chicago

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Chicago departing on 5/18. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
mar. 6/4
mar. 6/11

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In the last 7 days travelers have searched 42,830,901 times on KAYAK, and here is why:

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Good to know

Low season

March

High season

December

Cheapest flight

$49
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly and prices are also 23% lower on average.
Flight from St. Louis to Chicago Midway Airport

FAQs for booking flights from Illinois to Chicago

  • How does KAYAK find such low prices on flights from Illinois to Chicago?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Illinois to Chicago.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Chicago?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Illinois to Chicago?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Chicago with an airline and back to Illinois with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Chicago?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Chicago from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Prefer to fly non-stop from Illinois to Chicago?

Find which airlines fly direct from Illinois to Chicago, which days they fly and book direct flights.

Nonstop departures

Illinois to Chicago

Monday

ANA, Aer Lingus, Aeromexico, +80 more

ANA, Aer Lingus, +81 more

Tuesday

ANA, Aer Lingus, Aerolineas Argentinas, +79 more

ANA, Aer Lingus, +80 more

Wednesday

ANA, Aer Lingus, Aeromexico, +79 more

ANA, Aer Lingus, +80 more

Thursday

ANA, Aer Lingus, Aeromexico, +78 more

ANA, Aer Lingus, +79 more

Friday

ANA, Aer Lingus, Aerolineas Argentinas, +81 more

ANA, Aer Lingus, +82 more

Saturday

ANA, Aer Lingus, Aerolineas Argentinas, +79 more

ANA, Aer Lingus, +80 more

Sunday

ANA, Aer Lingus, Aerolineas Argentinas, +79 more

ANA, Aer Lingus, +80 more

See more direct flights

Nonstop returns

Chicago to Illinois

Monday

ANA, Aer Lingus, Aeromexico, +80 more

ANA, Aer Lingus, +81 more

Tuesday

ANA, Aer Lingus, Aerolineas Argentinas, +79 more

ANA, Aer Lingus, +80 more

Wednesday

ANA, Aer Lingus, Aeromexico, +79 more

ANA, Aer Lingus, +80 more

Thursday

ANA, Aer Lingus, Aeromexico, +78 more

ANA, Aer Lingus, +79 more

Friday

ANA, Aer Lingus, Aerolineas Argentinas, +81 more

ANA, Aer Lingus, +82 more

Saturday

ANA, Aer Lingus, Aerolineas Argentinas, +79 more

ANA, Aer Lingus, +80 more

Sunday

ANA, Aer Lingus, Aerolineas Argentinas, +79 more

ANA, Aer Lingus, +80 more

See more direct flights
See more direct flights

Book cheap flights from Illinois to Chicago

Recent round-trip flight deals

5/28mar.
nonstopUnited Airlines
1h 24mSTL-ORD
6/4mar.
nonstopUnited Airlines
1h 21mORD-STL
$97
5/15mié.
1 stopFrontier
12h 58mSTL-MDW
5/20lun.
1 stopFrontier
13h 03mMDW-STL
$122
5/28mar.
2 stopsSpirit Airlines
19h 20mSTL-ORD
6/4mar.
1 stopSpirit Airlines
14h 13mORD-STL
$131
5/28mar.
3 stopsSpirit Airlines
30h 00mSTL-ORD
6/4mar.
1 stopSpirit Airlines
14h 13mORD-STL
$142
5/15mié.
1 stop
18h 52mSTL-ORD
5/20lun.
1 stop
14h 14mORD-STL
$147
5/19dom.
1 stop
3h 52mSTL-ORD
5/21mar.
1 stop
14h 14mORD-STL
$153
5/29mié.
1 stopDelta
6h 37mSTL-ORD
6/5mié.
1 stopDelta
4h 48mORD-STL
$156
5/25sáb.
nonstopAmerican Airlines
1h 17mSTL-ORD
5/26dom.
nonstopAmerican Airlines
1h 13mORD-STL
$167
5/25sáb.
1 stopAmerican Airlines
7h 39mSTL-ORD
5/26dom.
nonstopAmerican Airlines
1h 13mORD-STL
$175
5/28mar.
1 stopDelta
6h 10mSTL-MDW
6/4mar.
1 stopDelta
3h 36mMDW-STL
$214

Search by stops

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Recent one-way flight deals

5/18sáb.
1 stopFrontier
10h 27mSTL-MDW
$49
5/26dom.
nonstopUnited Airlines
1h 24mSTL-ORD
$49
5/21mar.
1 stopSpirit Airlines
12h 55mSTL-ORD
$55
6/4mar.
1 stopSpirit Airlines
7h 06mSTL-ORD
$58
5/26dom.
1 stopDelta
4h 51mSTL-MDW
$78
5/26dom.
1 stopDelta
5h 14mSTL-ORD
$78
5/13lun.
1 stopSouthern / Mokulele
3h 15mSTL-ORD
$84
5/19dom.
1 stopSouthern / Mokulele
3h 52mSTL-ORD
$85
8/3sáb.
nonstopAmerican Airlines
1h 20mSTL-ORD
$98
5/25sáb.
nonstopAmerican Airlines
1h 16mSTL-ORD
$119

Search by stops

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Search by price

Last minute flights from Illinois to Chicago

Last minute flight, train and bus deals

5/6lun.
multi-stop
3h 15mSTL-ORD
5/13lun.
multi-stop
21h 23mORD-STL
$173
5/6lun.
multi-stopSouthern / Mokulele
10h 30mSTL-ORD
5/7mar.
multi-stopSouthern / Mokulele
14h 05mORD-STL
$175
5/6lun.
nonstopUnited Airlines
1h 07mDEC-ORD
5/16jue.
nonstopUnited Airlines
1h 07mORD-DEC
$198
5/8mié.
multi-stopFrontier
12h 32mSTL-MDW
5/20lun.
multi-stopFrontier
13h 03mMDW-STL
$208
5/8mié.
multi-stopFrontier
12h 32mSTL-MDW
5/19dom.
multi-stopFrontier
13h 18mMDW-STL
$218
5/6lun.
nonstopUnited Airlines
1h 26mSTL-ORD
5/27lun.
nonstopUnited Airlines
1h 21mORD-STL
$413
5/7mar.
nonstopAmerican Airlines
1h 18mSTL-ORD
5/23jue.
nonstopAmerican Airlines
1h 23mORD-STL
$419
5/6lun.
multi-stopAmerican Airlines
7h 29mSTL-ORD
5/27lun.
nonstopAmerican Airlines
1h 13mORD-STL
$421
5/7mar.
multi-stopDelta
6h 29mSTL-ORD
5/23jue.
multi-stopDelta
10h 07mORD-STL
$522
5/6lun.
multi-stopDelta
6h 58mSTL-MDW
5/8mié.
multi-stopDelta
7h 14mMDW-STL
$549

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Flights to Chicago

Return flight deals:

Chicago - Illinois

Cabin classes:

$575
$872
$668
$113