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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 6/21. 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
Mo 7/1
Mo 7/8

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In the last 7 days travelers have searched 42,787,818 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, +79 more

ANA, Aer Lingus, +80 more

Friday

ANA, Aer Lingus, Aerolineas Argentinas, +81 more

ANA, Aer Lingus, +82 more

Saturday

ANA, Aer Lingus, Aerolineas Argentinas, +80 more

ANA, Aer Lingus, +81 more

Sunday

ANA, Aer Lingus, Aerolineas Argentinas, +80 more

ANA, Aer Lingus, +81 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, +79 more

ANA, Aer Lingus, +80 more

Friday

ANA, Aer Lingus, Aerolineas Argentinas, +81 more

ANA, Aer Lingus, +82 more

Saturday

ANA, Aer Lingus, Aerolineas Argentinas, +80 more

ANA, Aer Lingus, +81 more

Sunday

ANA, Aer Lingus, Aerolineas Argentinas, +80 more

ANA, Aer Lingus, +81 more

See more direct flights
See more direct flights

Book cheap flights from Illinois to Chicago

Recent round-trip flight deals

6/21Fr
nonstopAmerican Airlines
1h 22mSTL-ORD
6/22Sa
nonstopAmerican Airlines
1h 17mORD-STL
$99
6/23So
nonstopAmerican Airlines
1h 22mSTL-ORD
6/26Mi
nonstopAmerican Airlines
1h 13mORD-STL
$108
6/15Sa
1 stopSouthern / Mokulele
19h 40mSTL-ORD
6/16So
1 stopSouthern / Mokulele
14h 05mORD-STL
$117
6/27Do
1 stopSouthern / Mokulele
17h 40mSTL-ORD
6/28Fr
1 stopSouthern / Mokulele
14h 05mORD-STL
$120
6/11Di
3 stops
31h 15mSTL-ORD
6/13Do
1 stop
8h 30mORD-STL
$156
6/28Fr
nonstopUnited Airlines
1h 25mSTL-ORD
7/5Fr
nonstopUnited Airlines
1h 23mORD-STL
$157
6/23So
1 stop
3h 35mSTL-ORD
6/26Mi
2 stops
23h 12mORD-STL
$159
7/2Di
1 stopSpirit Airlines
18h 38mSTL-ORD
7/8Mo
2 stopsSpirit Airlines
19h 01mORD-STL
$216
7/2Di
2 stopsSpirit Airlines
29h 24mSTL-ORD
7/9Di
1 stopSpirit Airlines
9h 18mORD-STL
$240
7/1Mo
nonstopUnited Airlines
1h 05mPIA-ORD
7/7So
nonstopUnited Airlines
1h 07mORD-PIA
$249

Search by stops

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Search by price

Recent one-way flight deals

6/21Fr
nonstopAmerican Airlines
1h 22mSTL-ORD
$50
6/29Sa
1 stopSouthern / Mokulele
4h 10mSTL-ORD
$56
8/27Di
2 stopsSpirit Airlines
22h 33mSTL-ORD
$71
8/10Sa
1 stopDelta
5h 57mSTL-MDW
$78
6/24Mo
nonstopSouthwest
1h 10mSTL-MDW
$80
7/31Mi
nonstopUnited Airlines
1h 29mSTL-ORD
$89
6/24Mo
1 stopSouthwest
11h 20mSTL-MDW
$98
8/10Sa
2 stopsDelta
6h 35mSTL-ORD
$112
7/2Di
2 stopsSpirit Airlines
22h 04mSTL-ORD
$116
6/7Fr
nonstopUnited Airlines
1h 34mSTL-ORD
$212

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to Chicago

Last minute flight, train and bus deals

6/4Di
multi-stopSouthern / Mokulele
3h 35mSTL-ORD
6/6Do
multi-stopSouthern / Mokulele
11h 30mORD-STL
$123
6/5Mi
multi-stopSouthern / Mokulele
19h 40mSTL-ORD
6/6Do
multi-stopSouthern / Mokulele
19h 20mORD-STL
$135
6/5Mi
multi-stop
14h 52mSTL-ORD
6/13Do
multi-stop
15h 13mORD-STL
$261
6/4Di
multi-stop
3h 35mSTL-ORD
6/6Do
multi-stop
15h 13mORD-STL
$271
6/2So
nonstopAmerican Airlines
1h 10mSPI-ORD
6/9So
nonstopAmerican Airlines
0h 58mORD-SPI
$358
6/5Mi
nonstopAmerican Airlines
1h 04mMLI-ORD
6/8Sa
nonstopAmerican Airlines
0h 58mORD-MLI
$413
6/1Sa
nonstopUnited Airlines
1h 30mSTL-ORD
6/1Sa
nonstopUnited Airlines
1h 27mORD-STL
$432
6/1Sa
nonstopUnited Airlines
1h 30mSTL-ORD
6/2So
nonstopUnited Airlines
1h 21mORD-STL
$452
6/1Sa
multi-stopDelta
4h 51mSTL-MDW
6/1Sa
multi-stopDelta
3h 47mMDW-STL
$456
6/1Sa
multi-stopDelta
6h 35mSTL-MDW
6/2So
multi-stopDelta
5h 48mMDW-STL
$471

Search by stops

Search by airline

Search by price

Flights to Chicago

Return flight deals:

Chicago - Illinois

Cabin classes:

$712
$777
$1,124
$117