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Find cheap flights from Illinois to Chicago O'Hare Airport from $49

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to O'Hare Intl 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
Fri 6/7
Fri 6/14

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In the last 7 days travelers have searched 43,968,530 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

June

Cheapest flight

$49
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 19% increase in price.
Flight from St. Louis to Chicago O'Hare Airport

FAQs for booking Illinois to Chicago O'Hare Airport flights

  • How does KAYAK find such low prices on flights from Illinois to Chicago O'Hare Airport?

    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 O'Hare Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Illinois to Chicago O'Hare Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago O'Hare Airport 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 O'Hare Airport?

    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 O'Hare Airport 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 O'Hare Airport?

    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 O'Hare Airport from Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

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Prefer to fly non-stop from Illinois to Chicago O'Hare Airport?

Find which airlines fly direct from Illinois to O'Hare Intl, which days they fly and book direct flights.

Nonstop departures

Illinois to Chicago O'Hare Intl

Monday

ANA, Aer Lingus, Aeromexico, +77 more

ANA, Aer Lingus, +78 more

Tuesday

ANA, Aer Lingus, Aerolineas Argentinas, +77 more

ANA, Aer Lingus, +78 more

Wednesday

ANA, Aer Lingus, Aeromexico, +77 more

ANA, Aer Lingus, +78 more

Thursday

ANA, Aer Lingus, Aeromexico, +76 more

ANA, Aer Lingus, +77 more

Friday

ANA, Aer Lingus, Aerolineas Argentinas, +78 more

ANA, Aer Lingus, +79 more

Saturday

ANA, Aer Lingus, Aerolineas Argentinas, +77 more

ANA, Aer Lingus, +78 more

Sunday

ANA, Aer Lingus, Aerolineas Argentinas, +77 more

ANA, Aer Lingus, +78 more

See more direct flights

Nonstop returns

Chicago O'Hare Intl to Illinois

Monday

ANA, Aer Lingus, Aeromexico, +77 more

ANA, Aer Lingus, +78 more

Tuesday

ANA, Aer Lingus, Aerolineas Argentinas, +77 more

ANA, Aer Lingus, +78 more

Wednesday

ANA, Aer Lingus, Aeromexico, +77 more

ANA, Aer Lingus, +78 more

Thursday

ANA, Aer Lingus, Aeromexico, +76 more

ANA, Aer Lingus, +77 more

Friday

ANA, Aer Lingus, Aerolineas Argentinas, +78 more

ANA, Aer Lingus, +79 more

Saturday

ANA, Aer Lingus, Aerolineas Argentinas, +77 more

ANA, Aer Lingus, +78 more

Sunday

ANA, Aer Lingus, Aerolineas Argentinas, +77 more

ANA, Aer Lingus, +78 more

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See more direct flights

Book cheap flights from Illinois to Chicago

Recent round-trip flight deals

5/28Tue
nonstopAmerican Airlines
1h 16mSTL-ORD
5/29Wed
nonstopAmerican Airlines
1h 23mORD-STL
$97
8/14Wed
nonstopAmerican Airlines
1h 22mSTL-ORD
8/17Sat
nonstopAmerican Airlines
1h 22mORD-STL
$107
6/4Tue
2 stopsSpirit Airlines
19h 39mSTL-ORD
6/11Tue
1 stopSpirit Airlines
9h 18mORD-STL
$134
6/4Tue
1 stopSpirit Airlines
12h 55mSTL-ORD
6/11Tue
1 stopSpirit Airlines
9h 18mORD-STL
$136
5/29Wed
1 stopDelta
6h 37mSTL-ORD
6/1Sat
1 stopDelta
4h 37mORD-STL
$156
5/28Tue
nonstopUnited Airlines
1h 24mSTL-ORD
5/31Fri
nonstopUnited Airlines
1h 21mORD-STL
$157
7/1Mon
nonstopUnited Airlines
1h 05mDEC-ORD
7/5Fri
nonstopUnited Airlines
1h 01mORD-DEC
$158
7/25Thu
nonstopSouthern / Mokulele
1h 57mUIN-ORD
8/15Thu
nonstopSouthern / Mokulele
1h 55mORD-UIN
$162
5/30Thu
1 stopSouthern / Mokulele
3h 15mSTL-ORD
5/31Fri
1 stopSouthern / Mokulele
5h 55mORD-STL
$171
5/29Wed
1 stopDelta
6h 37mSTL-ORD
6/5Wed
2 stopsDelta
10h 07mORD-STL
$222

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Recent one-way flight deals

5/30Thu
nonstopAmerican Airlines
1h 16mSTL-ORD
$49
6/1Sat
nonstopAmerican Airlines
1h 16mSTL-ORD
$59
5/26Sun
1 stopDelta
7h 10mSTL-ORD
$78
5/14Tue
1 stopFrontier
8h 06mSTL-ORD
$79
5/15Wed
1 stop
8h 54mSPI-ORD
$79
5/28Tue
2 stopsSpirit Airlines
19h 20mSTL-ORD
$83
5/24Fri
1 stopSouthern / Mokulele
3h 15mSTL-ORD
$84
5/21Tue
2 stopsSpirit Airlines
19h 20mSTL-ORD
$91
6/4Tue
2 stopsDelta
6h 31mSTL-ORD
$112
5/15Wed
2 stops
23h 30mSPI-ORD
$143

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Last minute flights from Illinois to O'Hare Intl

Last minute flight, train and bus deals

5/13Mon
multi-stopSouthern / Mokulele
7h 05mSTL-ORD
5/13Mon
multi-stopSouthern / Mokulele
11h 15mORD-STL
$176
5/10Fri
multi-stopSouthern / Mokulele
10h 30mSTL-ORD
5/12Sun
multi-stopSouthern / Mokulele
11h 15mORD-STL
$182
5/12Sun
multi-stop
19h 45mSTL-ORD
5/28Tue
multi-stop
23h 48mORD-STL
$247
5/12Sun
multi-stop
19h 45mSTL-ORD
5/28Tue
multi-stop
20h 10mORD-STL
$254
5/12Sun
nonstopUnited Airlines
1h 31mSTL-ORD
5/28Tue
nonstopUnited Airlines
1h 21mORD-STL
$312
5/12Sun
multi-stopDelta
6h 31mSTL-ORD
5/28Tue
multi-stopDelta
3h 50mORD-STL
$356
5/12Sun
multi-stopAmerican Airlines
5h 10mSTL-ORD
5/28Tue
nonstopAmerican Airlines
1h 23mORD-STL
$390
5/12Sun
multi-stopDelta
6h 31mSTL-ORD
5/28Tue
multi-stopDelta
10h 07mORD-STL
$422
5/11Sat
nonstopUnited Airlines
1h 31mSTL-ORD
5/15Wed
nonstopUnited Airlines
1h 22mORD-STL
$437
5/9Thu
nonstopAmerican Airlines
1h 10mSPI-ORD
5/14Tue
nonstopAmerican Airlines
1h 01mORD-SPI
$474

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Flights to Chicago O'Hare Airport

Destination:

Chicago O'Hare Airport (ORD)United States

Return flight deals:

Chicago O'Hare Airport - Illinois

Cabin classes:

$581
$777
$863
$114

Browse origins:

$279
Flights from Moline to Chicago O'Hare Intl Airport
$264
Flights from Peoria, Illinois to Chicago O'Hare Intl Airport
$162
Flights from Quincy, Illinois to Chicago O'Hare Intl Airport
$369
Flights from Springfield, Illinois to Chicago O'Hare Intl Airport
$134
Flights from St. Louis to Chicago O'Hare Intl Airport
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