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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
sex 6/14
sex 6/21

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In the last 7 days travelers have searched 42,393,389 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

5/30qui
nonstopAmerican Airlines
1h 16mSTL-ORD
6/4ter
nonstopAmerican Airlines
1h 13mORD-STL
$107
7/9ter
nonstopAmerican Airlines
1h 21mSTL-ORD
7/16ter
nonstopAmerican Airlines
1h 13mORD-STL
$117
6/4ter
1 stopSpirit Airlines
12h 55mSTL-ORD
6/6qui
2 stopsSpirit Airlines
12h 08mORD-STL
$154
9/14sáb
1 stopDelta
4h 39mSTL-MDW
10/5sáb
1 stopDelta
5h 20mMDW-STL
$156
6/25ter
1 stopDelta
4h 01mSTL-ORD
7/4qui
1 stopDelta
6h 04mORD-STL
$156
6/4ter
1 stop
12h 55mSTL-ORD
6/6qui
1 stop
5h 00mORD-STL
$165
6/3seg
nonstopSouthern / Mokulele
1h 57mUIN-ORD
6/5qua
nonstopSouthern / Mokulele
1h 55mORD-UIN
$168
6/29sáb
1 stopSouthern / Mokulele
21h 50mSTL-ORD
7/1seg
1 stopSouthern / Mokulele
5h 55mORD-STL
$174
6/4ter
2 stopsSpirit Airlines
19h 26mSTL-ORD
6/6qui
2 stopsSpirit Airlines
12h 08mORD-STL
$176
6/8sáb
1 stop
21h 52mSTL-ORD
6/10seg
2 stops
15h 35mORD-STL
$177

Search by stops

Search by airline

Search by price

Recent one-way flight deals

5/30qui
nonstopAmerican Airlines
1h 17mSTL-ORD
$49
5/21ter
1 stopSpirit Airlines
12h 55mSTL-ORD
$55
9/28sáb
1 stopDelta
4h 39mSTL-MDW
$78
5/20seg
1 stopSouthern / Mokulele
3h 15mSTL-ORD
$83
6/10seg
1 stopSouthern / Mokulele
3h 15mSTL-ORD
$85
6/12qua
3 stops
27h 47mSTL-ORD
$105
6/4ter
1 stopDelta
5h 06mSTL-MDW
$107
5/31sex
nonstopUnited Airlines
1h 24mSTL-ORD
$109
7/5sex
nonstopUnited Airlines
1h 25mSTL-ORD
$130
5/31sex
3 stops
20h 31mPIA-ORD
$134

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to Chicago

Last minute flight, train and bus deals

5/17sex
multi-stopSouthern / Mokulele
3h 15mSTL-ORD
5/19dom
multi-stopSouthern / Mokulele
18h 30mORD-STL
$183
5/17sex
multi-stopSouthern / Mokulele
3h 52mSTL-ORD
5/19dom
multi-stopSouthern / Mokulele
19h 00mORD-STL
$185
5/19dom
multi-stop
6h 25mSTL-ORD
5/20seg
multi-stop
18h 44mORD-STL
$281
5/19dom
multi-stop
3h 52mSTL-ORD
5/20seg
multi-stop
18h 44mORD-STL
$287
5/20seg
nonstopUnited Airlines
1h 31mSTL-ORD
6/6qui
nonstopUnited Airlines
1h 21mORD-STL
$362
5/20seg
multi-stopAmerican Airlines
5h 09mSTL-ORD
6/6qui
nonstopAmerican Airlines
1h 17mORD-STL
$370
5/19dom
nonstopSouthwest
1h 05mSTL-MDW
5/21ter
nonstopSouthwest
1h 10mMDW-STL
$394
5/19dom
nonstopSouthwest
1h 05mSTL-MDW
5/21ter
multi-stopSouthwest
5h 50mMDW-STL
$402
5/19dom
nonstopUnited Airlines
1h 31mSTL-ORD
5/21ter
nonstopUnited Airlines
1h 29mORD-STL
$427
5/17sex
nonstopAmerican Airlines
1h 10mSPI-ORD
5/29qua
nonstopAmerican Airlines
1h 00mORD-SPI
$474

Search by stops

Search by airline

Search by price

Flights to Chicago

Return flight deals:

Chicago - Illinois

Cabin classes:

$587
$777
$805
$107