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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 5/30. 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
Thu 6/13
Thu 6/20

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In the last 7 days travelers have searched 42,566,405 times on KAYAK, and here is why:

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Good to know

Low season

March

High season

August

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 27% lower on average.
Flight from St. Louis to Chicago O'Hare 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

5/30Thu
nonstopAmerican Airlines
1h 17mSTL-ORD
5/31Fri
nonstopAmerican Airlines
1h 20mORD-STL
$97
6/26Wed
nonstopAmerican Airlines
1h 22mSTL-ORD
6/29Sat
nonstopAmerican Airlines
1h 17mORD-STL
$147
6/1Sat
nonstopUnited Airlines
1h 05mDEC-ORD
6/9Sun
nonstopUnited Airlines
1h 01mORD-DEC
$148
6/7Fri
nonstopUnited Airlines
1h 05mDEC-ORD
6/10Mon
nonstopUnited Airlines
1h 01mORD-DEC
$158
6/14Fri
1 stopSouthern / Mokulele
3h 15mSTL-ORD
6/17Mon
1 stopSouthern / Mokulele
5h 55mORD-STL
$172
5/26Sun
1 stopSouthern / Mokulele
3h 15mSTL-ORD
5/27Mon
1 stopSouthern / Mokulele
5h 55mORD-STL
$173
6/8Sat
1 stop
21h 52mSTL-ORD
6/10Mon
2 stops
15h 35mORD-STL
$177
5/26Sun
1 stop
3h 52mSTL-ORD
6/3Mon
1 stop
14h 59mORD-STL
$181
7/9Tue
1 stopDelta
6h 12mSTL-MDW
7/10Wed
2 stopsDelta
7h 13mMDW-STL
$192
7/9Tue
1 stopDelta
6h 11mSTL-ORD
7/10Wed
2 stopsDelta
9h 36mORD-STL
$192

Search by stops

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Search by price

Recent one-way flight deals

5/30Thu
nonstopAmerican Airlines
1h 17mSTL-ORD
$49
6/8Sat
nonstopAmerican Airlines
1h 22mSTL-ORD
$59
6/11Tue
1 stopSpirit Airlines
11h 48mSTL-ORD
$62
6/4Tue
1 stopSpirit Airlines
7h 06mSTL-ORD
$66
6/8Sat
1 stopDelta
5h 39mSTL-MDW
$78
6/4Tue
1 stopDelta
5h 24mSTL-ORD
$78
6/2Sun
1 stopSouthern / Mokulele
3h 52mSTL-ORD
$80
6/21Fri
1 stopSouthern / Mokulele
3h 15mSTL-ORD
$82
6/11Tue
nonstopUnited Airlines
1h 30mSTL-ORD
$99
5/31Fri
nonstopUnited Airlines
1h 24mSTL-ORD
$109

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to Chicago

Last minute flight, train and bus deals

5/15Wed
multi-stop
21h 52mSTL-ORD
5/21Tue
multi-stop
11h 54mORD-STL
$169
5/19Sun
multi-stopSouthern / Mokulele
3h 52mSTL-ORD
5/20Mon
multi-stopSouthern / Mokulele
5h 55mORD-STL
$173
5/17Fri
multi-stopUnited Airlines
26h 25mMLI-ORD
5/18Sat
nonstopUnited Airlines
1h 06mORD-MLI
$413
5/18Sat
nonstopAmerican Airlines
1h 02mMLI-ORD
5/21Tue
nonstopAmerican Airlines
1h 00mORD-MLI
$423
5/18Sat
nonstopUnited Airlines
1h 24mSTL-ORD
5/18Sat
nonstopUnited Airlines
1h 29mORD-STL
$431
5/15Wed
nonstopAmerican Airlines
1h 19mSTL-ORD
5/21Tue
multi-stopAmerican Airlines
4h 40mORD-STL
$445
5/19Sun
multi-stopDelta
4h 59mSTL-MDW
5/21Tue
multi-stopDelta
4h 01mMDW-STL
$544
5/15Wed
multi-stopDelta
6h 34mSTL-MDW
5/21Tue
multi-stopDelta
3h 36mMDW-STL
$607
5/18Sat
multi-stopFrontier
10h 27mSTL-MDW
5/20Mon
multi-stopFrontier
10h 00mMDW-STL
$968
5/17Fri
multi-stopFrontier
11h 10mSTL-MDW
5/19Sun
multi-stopFrontier
10h 47mMDW-STL
$1,134

Search by stops

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Search by price

Flights to Chicago

Return flight deals:

Chicago - Illinois

Cabin classes:

$587
$777
$805
$107