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$50 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 6/19. 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
Fri 6/21
Fri 6/28

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In the last 7 days travelers have searched 43,423,329 times on KAYAK, and here is why:

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Good to know

Low season

March

High season

August

Cheapest flight

$50
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

6/15Sat
nonstopAmerican Airlines
1h 22mSTL-ORD
6/22Sat
nonstopAmerican Airlines
1h 17mORD-STL
$99
6/18Tue
nonstopAmerican Airlines
1h 22mSTL-ORD
6/25Tue
nonstopAmerican Airlines
1h 13mORD-STL
$108
6/20Thu
nonstopSouthern / Mokulele
1h 40mBRL-ORD
6/27Thu
nonstopSouthern / Mokulele
1h 40mORD-BRL
$139
6/20Thu
nonstopUnited Airlines
1h 05mDEC-ORD
6/26Wed
nonstopUnited Airlines
1h 01mORD-DEC
$148
6/14Fri
nonstopUnited Airlines
1h 24mSTL-ORD
6/15Sat
nonstopUnited Airlines
1h 21mORD-STL
$148
7/10Wed
nonstopSouthern / Mokulele
1h 40mBRL-ORD
7/13Sat
nonstopSouthern / Mokulele
1h 40mORD-BRL
$149
6/18Tue
1 stopDelta
5h 39mSTL-MDW
6/25Tue
1 stopDelta
4h 16mMDW-STL
$156
6/14Fri
1 stopDelta
4h 50mSTL-ORD
6/15Sat
1 stopDelta
4h 30mORD-STL
$156
6/11Tue
1 stopSpirit Airlines
25h 05mSTL-ORD
6/20Thu
2 stopsSpirit Airlines
12h 08mORD-STL
$160
6/11Tue
1 stopSpirit Airlines
25h 05mSTL-ORD
6/20Thu
1 stopSpirit Airlines
12h 23mORD-STL
$174

Search by stops

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Search by price

Recent one-way flight deals

6/19Wed
nonstopAmerican Airlines
1h 22mSTL-ORD
$50
7/31Wed
nonstopAmerican Airlines
1h 20mSTL-ORD
$59
6/18Tue
1 stopDelta
5h 39mSTL-MDW
$78
9/28Sat
1 stopDelta
6h 54mSTL-ORD
$78
6/2Sun
1 stopSouthern / Mokulele
3h 52mSTL-ORD
$83
7/19Fri
1 stopSouthern / Mokulele
3h 15mSTL-ORD
$84
8/26Mon
2 stopsSpirit Airlines
24h 56mSTL-ORD
$87
6/19Wed
nonstopUnited Airlines
1h 05mDEC-ORD
$98
6/18Tue
2 stopsSpirit Airlines
22h 04mSTL-ORD
$99
7/24Wed
nonstopUnited Airlines
1h 03mPIA-ORD
$120

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to Chicago

Last minute flight, train and bus deals

5/24Fri
multi-stopSouthern / Mokulele
3h 15mSTL-ORD
5/26Sun
multi-stopSouthern / Mokulele
3h 50mORD-STL
$172
5/23Thu
multi-stopSouthern / Mokulele
3h 52mSTL-ORD
5/27Mon
multi-stopSouthern / Mokulele
5h 00mORD-STL
$179
5/25Sat
multi-stop
21h 50mSTL-ORD
6/1Sat
multi-stop
15h 08mORD-STL
$288
5/25Sat
multi-stop
21h 52mSTL-ORD
5/28Tue
multi-stop
24h 49mORD-STL
$292
5/25Sat
nonstopAmerican Airlines
1h 02mMLI-ORD
6/1Sat
nonstopAmerican Airlines
1h 02mORD-MLI
$423
5/25Sat
multi-stopFrontier
11h 00mSTL-MDW
5/27Mon
multi-stopFrontier
12h 38mMDW-STL
$426
5/25Sat
nonstopAmerican Airlines
1h 18mSTL-ORD
6/1Sat
nonstopAmerican Airlines
1h 20mORD-STL
$437
5/25Sat
multi-stopDelta
6h 35mSTL-MDW
6/1Sat
multi-stopDelta
4h 52mMDW-STL
$456
5/23Thu
multi-stopDelta
5h 05mSTL-MDW
5/27Mon
multi-stopDelta
5h 48mMDW-STL
$486
5/24Fri
multi-stopFrontier
11h 10mSTL-MDW
5/28Tue
multi-stopFrontier
7h 09mMDW-STL
$618

Search by stops

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Search by price

Flights to Chicago

Return flight deals:

Chicago - Illinois

Cabin classes:

$587
$777
$767
$119