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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 6/4. 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
Sat 6/8
Sat 6/15

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In the last 7 days travelers have searched 43,895,468 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 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

6/11Tue
nonstopAmerican Airlines
1h 22mSTL-ORD
6/11Tue
nonstopAmerican Airlines
1h 13mORD-STL
$97
8/26Mon
nonstopUnited Airlines
1h 21mSTL-ORD
8/28Wed
nonstopUnited Airlines
1h 19mORD-STL
$107
5/23Thu
1 stop
9h 37mSTL-ORD
5/27Mon
1 stop
5h 00mORD-STL
$139
5/23Thu
1 stop
9h 37mSTL-ORD
5/26Sun
1 stop
9h 45mORD-STL
$145
5/22Wed
1 stopFrontier
5h 22mSTL-MDW
5/22Wed
1 stopFrontier
13h 03mMDW-STL
$148
7/2Tue
nonstopSouthern / Mokulele
1h 57mUIN-ORD
7/29Mon
nonstopSouthern / Mokulele
1h 55mORD-UIN
$159
6/19Wed
nonstopSouthern / Mokulele
1h 57mUIN-ORD
6/26Wed
nonstopSouthern / Mokulele
1h 55mORD-UIN
$162
6/3Mon
nonstopSouthwest
1h 05mSTL-MDW
6/5Wed
nonstopSouthwest
1h 10mMDW-STL
$176
6/3Mon
nonstopSouthwest
1h 05mSTL-MDW
6/5Wed
1 stopSouthwest
12h 25mMDW-STL
$180
5/28Tue
1 stopFrontier
10h 27mSTL-MDW
5/29Wed
1 stopFrontier
13h 03mMDW-STL
$198

Search by stops

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Search by price

Recent one-way flight deals

6/4Tue
nonstopAmerican Airlines
1h 16mSTL-ORD
$49
9/19Thu
nonstopAmerican Airlines
1h 19mSTL-ORD
$59
6/4Tue
1 stopSpirit Airlines
8h 35mSTL-ORD
$63
6/4Tue
1 stopSpirit Airlines
7h 06mSTL-ORD
$66
9/19Thu
1 stopDelta
6h 32mSTL-MDW
$78
6/4Tue
1 stopDelta
4h 33mSTL-ORD
$78
7/2Tue
nonstopSouthern / Mokulele
1h 57mUIN-ORD
$79
5/15Wed
1 stop
8h 54mSPI-ORD
$79
6/24Mon
1 stopSouthern / Mokulele
3h 15mSTL-ORD
$82
5/22Wed
1 stop
13h 27mSPI-ORD
$122

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to Chicago

Last minute flight, train and bus deals

5/13Mon
multi-stopSouthern / Mokulele
7h 05mSTL-ORD
5/13Mon
multi-stopSouthern / Mokulele
17h 15mORD-STL
$176
5/13Mon
multi-stopSouthern / Mokulele
7h 05mSTL-ORD
5/13Mon
multi-stopSouthern / Mokulele
11h 15mORD-STL
$179
5/14Tue
multi-stop
10h 30mSTL-ORD
5/15Wed
multi-stop
24h 00mORD-STL
$237
5/14Tue
multi-stop
10h 42mSTL-ORD
5/15Wed
multi-stop
24h 00mORD-STL
$300
5/11Sat
multi-stopFrontier
12h 27mSTL-MDW
5/15Wed
multi-stopFrontier
11h 14mMDW-STL
$318
5/14Tue
multi-stopFrontier
12h 37mSTL-MDW
5/15Wed
multi-stopFrontier
11h 14mMDW-STL
$398
5/14Tue
nonstopUnited Airlines
1h 31mSTL-ORD
5/15Wed
nonstopUnited Airlines
1h 29mORD-STL
$437
5/14Tue
multi-stopDelta
6h 10mSTL-MDW
5/15Wed
multi-stopDelta
8h 31mMDW-STL
$442
5/14Tue
multi-stopDelta
6h 37mSTL-ORD
5/15Wed
multi-stopDelta
10h 07mORD-STL
$442
5/13Mon
nonstopUnited Airlines
1h 31mSTL-ORD
5/13Mon
nonstopUnited Airlines
1h 22mORD-STL
$461

Search by stops

Search by airline

Search by price

Flights to Chicago

Return flight deals:

Chicago - Illinois

Cabin classes:

$581
$777
$863
$114