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

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
Sat 6/15
Sat 6/22

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In the last 7 days travelers have searched 42,211,976 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 17% 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.

See more FAQs

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 17mSTL-ORD
5/31Fri
nonstopAmerican Airlines
1h 23mORD-STL
$97
6/18Tue
nonstopAmerican Airlines
1h 22mSTL-ORD
7/3Wed
nonstopAmerican Airlines
1h 13mORD-STL
$107
6/12Wed
nonstopUnited Airlines
1h 05mDEC-ORD
6/19Wed
nonstopUnited Airlines
1h 01mORD-DEC
$148
6/4Tue
1 stopSpirit Airlines
8h 35mSTL-ORD
6/6Thu
2 stopsSpirit Airlines
12h 08mORD-STL
$149
9/14Sat
1 stopDelta
6h 54mSTL-ORD
9/24Tue
1 stopDelta
3h 52mORD-STL
$156
9/20Fri
nonstopUnited Airlines
1h 06mDEC-ORD
9/23Mon
nonstopUnited Airlines
1h 10mORD-DEC
$158
6/4Tue
2 stopsSpirit Airlines
19h 39mSTL-ORD
6/6Thu
2 stopsSpirit Airlines
12h 08mORD-STL
$159
6/4Tue
1 stop
8h 35mSTL-ORD
6/6Thu
1 stop
4h 10mORD-STL
$161
8/6Tue
2 stopsDelta
6h 07mSTL-ORD
8/9Fri
1 stopDelta
4h 13mORD-STL
$190
6/13Thu
1 stop
3h 15mSTL-ORD
6/20Thu
2 stops
12h 08mORD-STL
$201

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Recent one-way flight deals

5/30Thu
nonstopAmerican Airlines
1h 17mSTL-ORD
$49
6/5Wed
nonstopAmerican Airlines
1h 21mSTL-ORD
$59
6/4Tue
1 stopSpirit Airlines
8h 35mSTL-ORD
$62
6/4Tue
2 stopsSpirit Airlines
19h 39mSTL-ORD
$71
9/28Sat
1 stopDelta
4h 54mSTL-ORD
$78
5/31Fri
nonstopUnited Airlines
1h 24mSTL-ORD
$79
6/28Fri
1 stopSouthern / Mokulele
3h 52mSTL-ORD
$82
6/18Tue
2 stopsDelta
6h 29mSTL-ORD
$83
5/23Thu
1 stopSouthern / Mokulele
3h 15mSTL-ORD
$84
7/1Mon
nonstopUnited Airlines
1h 05mDEC-ORD
$98

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Last minute flights from Illinois to O'Hare Intl

Last minute flight, train and bus deals

5/20Mon
multi-stopSouthern / Mokulele
3h 15mSTL-ORD
5/22Wed
multi-stopSouthern / Mokulele
4h 10mORD-STL
$175
5/19Sun
multi-stopSouthern / Mokulele
3h 52mSTL-ORD
5/20Mon
multi-stopSouthern / Mokulele
5h 55mORD-STL
$179
5/17Fri
nonstopUnited Airlines
1h 07mDEC-ORD
5/19Sun
nonstopUnited Airlines
1h 07mORD-DEC
$198
5/18Sat
multi-stop
21h 50mSTL-ORD
6/5Wed
multi-stop
19h 51mORD-STL
$215
5/18Sat
multi-stop
21h 50mSTL-ORD
6/5Wed
multi-stop
30h 27mORD-STL
$225
5/17Fri
nonstopUnited Airlines
1h 06mMLI-ORD
5/17Fri
multi-stopUnited Airlines
24h 08mORD-MLI
$369
5/18Sat
nonstopAmerican Airlines
1h 02mMLI-ORD
5/25Sat
nonstopAmerican Airlines
1h 00mORD-MLI
$423
5/21Tue
nonstopAmerican Airlines
1h 16mSTL-ORD
5/28Tue
multi-stopAmerican Airlines
5h 50mORD-STL
$445
5/18Sat
multi-stopDelta
6h 31mSTL-ORD
5/19Sun
multi-stopDelta
5h 43mORD-STL
$476
5/17Fri
multi-stopDelta
4h 33mSTL-ORD
5/18Sat
multi-stopDelta
9h 53mORD-STL
$767

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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:

$587
$777
$805
$107

Browse origins:

$509
Flights from Dubuque to Chicago O'Hare Intl Airport
$306
Flights from Evansville to Chicago O'Hare Intl Airport
Flights from Marion, Illinois to Chicago O'Hare Intl Airport
$279
Flights from Moline to Chicago O'Hare Intl Airport
$435
Flights from Paducah to Chicago O'Hare Intl Airport
$259
Flights from Peoria, Illinois to Chicago O'Hare Intl Airport
$168
Flights from Quincy, Illinois to Chicago O'Hare Intl Airport
$369
Flights from Springfield, Illinois to Chicago O'Hare Intl Airport
$149
Flights from St. Louis to Chicago O'Hare Intl Airport
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