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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 5/29. 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
sáb. 6/1
sáb. 6/8

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In the last 7 days travelers have searched 43,740,974 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 20% drop in price.
Most popular time to fly with an average 25% 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, +76 more

ANA, Aer Lingus, +77 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, Aeromexico, +76 more

ANA, Aer Lingus, +77 more

Sunday

ANA, Aer Lingus, Aerolineas Argentinas, +76 more

ANA, Aer Lingus, +77 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, +76 more

ANA, Aer Lingus, +77 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, Aeromexico, +76 more

ANA, Aer Lingus, +77 more

Sunday

ANA, Aer Lingus, Aerolineas Argentinas, +76 more

ANA, Aer Lingus, +77 more

See more direct flights
See more direct flights

Book cheap flights from Illinois to Chicago

Recent round-trip flight deals

5/29mié.
nonstopUnited Airlines
1h 34mSTL-ORD
6/5mié.
nonstopUnited Airlines
1h 21mORD-STL
$97
8/14mié.
nonstopAmerican Airlines
1h 23mSTL-ORD
8/17sáb.
nonstopAmerican Airlines
1h 22mORD-STL
$107
5/18sáb.
1 stopSouthern / Mokulele
4h 10mSTL-ORD
5/19dom.
1 stopSouthern / Mokulele
14h 05mORD-STL
$132
5/11sáb.
1 stopSouthern / Mokulele
19h 40mSTL-ORD
5/13lun.
1 stopSouthern / Mokulele
14h 05mORD-STL
$136
5/17vie.
1 stopSouthern / Mokulele
3h 52mSTL-ORD
5/19dom.
1 stopSouthern / Mokulele
15h 25mORD-STL
$148
9/10mar.
1 stopDelta
6h 04mSTL-ORD
10/15mar.
1 stopDelta
3h 52mORD-STL
$156
5/16jue.
1 stopFrontier
9h 37mSTL-ORD
5/19dom.
1 stopFrontier
14h 14mORD-STL
$158
5/11sáb.
2 stops
13h 39mSTL-ORD
5/13lun.
1 stop
8h 30mORD-STL
$161
5/11sáb.
1 stop
7h 06mSTL-ORD
5/12dom.
1 stop
3h 05mORD-STL
$164
7/9mar.
2 stopsDelta
6h 20mSTL-ORD
7/16mar.
2 stopsDelta
11h 16mORD-STL
$166

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Recent one-way flight deals

5/29mié.
nonstopAmerican Airlines
1h 16mSTL-ORD
$49
5/7mar.
1 stopSpirit Airlines
13h 46mSTL-ORD
$55
5/13lun.
1 stopSouthern / Mokulele
4h 10mSTL-ORD
$63
5/8mié.
1 stopSouthern / Mokulele
4h 10mSTL-ORD
$66
5/29mié.
1 stopDelta
6h 37mSTL-ORD
$78
5/10vie.
1 stopFrontier
7h 21mSTL-ORD
$79
5/14mar.
1 stopFrontier
8h 06mSTL-ORD
$80
7/5vie.
nonstopUnited Airlines
1h 05mDEC-ORD
$98
7/10mié.
nonstopUnited Airlines
1h 29mSTL-ORD
$108
6/1sáb.
2 stopsDelta
6h 31mSTL-ORD
$112

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Last minute flights from Illinois to O'Hare Intl

Last minute flight, train and bus deals

5/5dom.
multi-stopSouthern / Mokulele
24h 45mSTL-ORD
5/11sáb.
multi-stopSouthern / Mokulele
14h 05mORD-STL
$158
5/6lun.
multi-stopSouthern / Mokulele
20h 40mUIN-ORD
5/10vie.
nonstopSouthern / Mokulele
1h 45mORD-UIN
$160
5/6lun.
multi-stop
3h 15mSTL-ORD
5/13lun.
multi-stop
21h 23mORD-STL
$171
5/4sáb.
multi-stop
7h 05mSTL-ORD
5/7mar.
multi-stop
27h 43mORD-STL
$196
5/3vie.
nonstopUnited Airlines
1h 07mDEC-ORD
5/6lun.
nonstopUnited Airlines
1h 07mORD-DEC
$198
5/4sáb.
nonstopUnited Airlines
1h 26mSTL-ORD
5/7mar.
nonstopUnited Airlines
1h 22mORD-STL
$441
5/4sáb.
multi-stopAmerican Airlines
7h 08mSTL-ORD
5/7mar.
nonstopAmerican Airlines
1h 20mORD-STL
$449
5/5dom.
nonstopAmerican Airlines
1h 21mSTL-ORD
5/11sáb.
nonstopAmerican Airlines
1h 26mORD-STL
$469
5/7mar.
multi-stopDelta
6h 31mSTL-ORD
5/23jue.
multi-stopDelta
5h 03mORD-STL
$484
5/7mar.
multi-stopDelta
10h 49mSTL-ORD
5/8mié.
multi-stopDelta
8h 48mORD-STL
$501

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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:

$575
$872
$668
$113

Browse origins:

$338
Flights from Moline to Chicago O'Hare Intl Airport
$269
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
$128
Flights from St. Louis to Chicago O'Hare Intl Airport
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