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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
Thu 6/6
Thu 6/13

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In the last 7 days travelers have searched 42,573,820 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

See more direct flights
See more direct flights

Book cheap flights from Illinois to Chicago

Recent round-trip flight deals

5/30Thu
nonstopAmerican Airlines
1h 16mSTL-ORD
5/31Fri
nonstopAmerican Airlines
1h 23mORD-STL
$97
9/26Thu
nonstopUnited Airlines
1h 21mSTL-ORD
9/28Sat
nonstopUnited Airlines
1h 22mORD-STL
$117
5/17Fri
1 stopFrontier
10h 30mSTL-ORD
5/20Mon
1 stopFrontier
14h 14mORD-STL
$127
5/18Sat
1 stopFrontier
7h 33mSTL-ORD
5/19Sun
1 stopFrontier
14h 14mORD-STL
$134
6/4Tue
1 stopSpirit Airlines
7h 06mSTL-ORD
6/11Tue
1 stopSpirit Airlines
9h 18mORD-STL
$138
5/20Mon
1 stop
3h 52mSTL-ORD
5/21Tue
1 stop
14h 14mORD-STL
$143
6/4Tue
2 stopsSpirit Airlines
19h 26mSTL-ORD
6/11Tue
1 stopSpirit Airlines
9h 18mORD-STL
$145
5/29Wed
1 stopDelta
6h 37mSTL-ORD
6/1Sat
1 stopDelta
4h 37mORD-STL
$156
5/31Fri
1 stop
3h 15mSTL-ORD
6/4Tue
1 stop
23h 52mORD-STL
$164
7/2Tue
1 stopDelta
6h 31mSTL-ORD
7/8Mon
2 stopsDelta
11h 16mORD-STL
$220

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Recent one-way flight deals

5/30Thu
nonstopAmerican Airlines
1h 16mSTL-ORD
$49
6/4Tue
1 stopSpirit Airlines
7h 06mSTL-ORD
$58
5/16Thu
1 stopFrontier
9h 37mSTL-ORD
$75
5/29Wed
1 stopDelta
6h 37mSTL-ORD
$78
5/14Tue
1 stopFrontier
8h 06mSTL-ORD
$79
6/8Sat
nonstopSouthern / Mokulele
1h 57mUIN-ORD
$82
6/13Thu
1 stopSouthern / Mokulele
3h 15mSTL-ORD
$84
5/22Wed
1 stop
13h 27mSPI-ORD
$95
5/17Fri
3 stops
38h 20mPIA-ORD
$105
7/27Sat
2 stopsDelta
6h 28mSTL-ORD
$233

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Last minute flights from Illinois to O'Hare Intl

Last minute flight, train and bus deals

5/10Fri
multi-stopSouthern / Mokulele
7h 05mSTL-ORD
5/12Sun
multi-stopSouthern / Mokulele
3h 05mORD-STL
$179
5/9Thu
multi-stopSouthern / Mokulele
10h 30mSTL-ORD
5/12Sun
multi-stopSouthern / Mokulele
3h 05mORD-STL
$180
5/7Tue
multi-stop
10h 30mSTL-ORD
5/23Thu
multi-stop
14h 06mORD-STL
$185
5/7Tue
multi-stop
15h 30mSTL-ORD
5/23Thu
multi-stop
14h 06mORD-STL
$189
5/7Tue
nonstopUnited Airlines
1h 31mSTL-ORD
5/23Thu
nonstopUnited Airlines
1h 23mORD-STL
$419
5/8Wed
nonstopAmerican Airlines
1h 03mMLI-ORD
5/15Wed
nonstopAmerican Airlines
1h 04mORD-MLI
$423
5/7Tue
nonstopAmerican Airlines
1h 18mSTL-ORD
5/23Thu
multi-stopAmerican Airlines
4h 48mORD-STL
$427
5/8Wed
nonstopUnited Airlines
1h 31mSTL-ORD
5/8Wed
nonstopUnited Airlines
1h 26mORD-STL
$431
5/7Tue
multi-stopDelta
9h 39mSTL-ORD
5/8Wed
multi-stopDelta
7h 13mORD-STL
$433
5/7Tue
multi-stopDelta
6h 37mSTL-ORD
5/8Wed
multi-stopDelta
9h 37mORD-STL
$461

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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
$132
Flights from St. Louis to Chicago O'Hare Intl Airport
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