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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 6/20. 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 6/27
Thu 7/4

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In the last 7 days travelers have searched 42,816,550 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

6/26Wed
nonstopAmerican Airlines
1h 22mSTL-ORD
6/26Wed
nonstopAmerican Airlines
1h 13mORD-STL
$108
8/24Sat
1 stopSouthern / Mokulele
19h 40mSTL-ORD
8/25Sun
1 stopSouthern / Mokulele
14h 05mORD-STL
$114
7/24Wed
nonstopUnited Airlines
1h 29mSTL-ORD
7/31Wed
nonstopUnited Airlines
1h 23mORD-STL
$137
8/4Sun
1 stop
3h 35mSTL-ORD
8/27Tue
1 stop
7h 28mORD-STL
$140
6/26Wed
1 stop
3h 35mSTL-ORD
6/26Wed
2 stops
23h 12mORD-STL
$154
6/25Tue
1 stopDelta
5h 39mSTL-MDW
6/29Sat
1 stopDelta
3h 32mMDW-STL
$156
6/20Thu
nonstopUnited Airlines
1h 05mDEC-ORD
6/26Wed
nonstopUnited Airlines
1h 01mORD-DEC
$158
6/25Tue
1 stopDelta
6h 13mSTL-MDW
7/1Mon
1 stopDelta
6h 00mMDW-STL
$186
8/30Fri
nonstopSouthwest
1h 10mSTL-MDW
9/1Sun
1 stopSouthwest
5h 00mMDW-STL
$210
8/30Fri
1 stopSouthwest
5h 05mSTL-MDW
9/1Sun
1 stopSouthwest
5h 00mMDW-STL
$219

Search by stops

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Search by price

Recent one-way flight deals

6/20Thu
nonstopAmerican Airlines
1h 22mSTL-ORD
$50
8/27Tue
1 stopSouthern / Mokulele
3h 35mSTL-ORD
$53
8/27Tue
2 stopsSpirit Airlines
18h 58mSTL-ORD
$73
8/27Tue
3 stopsSpirit Airlines
22h 33mSTL-ORD
$75
8/27Tue
1 stopDelta
6h 02mSTL-MDW
$78
8/14Wed
1 stopDelta
4h 14mSTL-ORD
$78
7/15Mon
nonstopUnited Airlines
1h 05mDEC-ORD
$98
9/19Thu
1 stopFrontier
11h 04mSTL-MDW
$119
6/20Thu
1 stopFrontier
9h 45mSTL-MDW
$137
6/3Mon
nonstopUnited Airlines
1h 05mDEC-ORD
$148

Search by stops

Search by airline

Search by price

Last minute flights from Illinois to Chicago

Last minute flight, train and bus deals

5/31Fri
multi-stopSouthern / Mokulele
3h 35mSTL-ORD
6/2Sun
multi-stopSouthern / Mokulele
14h 05mORD-STL
$114
5/29Wed
multi-stopSouthern / Mokulele
3h 35mSTL-ORD
5/30Thu
multi-stopSouthern / Mokulele
14h 05mORD-STL
$117
5/31Fri
multi-stopSouthern / Mokulele
3h 35mSTL-ORD
6/2Sun
multi-stopSouthern / Mokulele
14h 05mORD-STL
$121
5/30Thu
multi-stop
26h 10mSTL-ORD
6/4Tue
multi-stop
32h 05mORD-STL
$175
5/30Thu
multi-stop
14h 40mSTL-ORD
6/4Tue
multi-stop
17h 25mORD-STL
$205
5/30Thu
multi-stopSpirit Airlines
21h 05mSTL-ORD
6/4Tue
multi-stopSpirit Airlines
32h 05mORD-STL
$374
5/29Wed
nonstopUnited Airlines
1h 05mDEC-ORD
6/1Sat
nonstopUnited Airlines
1h 01mORD-DEC
$390
5/28Tue
nonstopUnited Airlines
1h 34mSTL-ORD
6/4Tue
nonstopUnited Airlines
1h 21mORD-STL
$437
5/28Tue
nonstopAmerican Airlines
1h 16mSTL-ORD
6/4Tue
multi-stopAmerican Airlines
4h 40mORD-STL
$445
6/2Sun
nonstopAmerican Airlines
1h 10mSPI-ORD
6/9Sun
nonstopAmerican Airlines
1h 00mORD-SPI
$449

Search by stops

Search by airline

Search by price

Flights to Chicago

Return flight deals:

Chicago - Illinois

Cabin classes:

$712
$777
$1,124
$117