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$50 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 6/21. 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
Mon 7/1
Mon 7/8

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In the last 7 days travelers have searched 42,335,261 times on KAYAK, and here is why:

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Good to know

Low season

January

High season

June

Cheapest flight

$50
Best time to beat the crowds with an average 10% drop in price.
Most popular time to fly with an average 12% 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, +78 more

ANA, Aer Lingus, +79 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, +78 more

ANA, Aer Lingus, +79 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

6/21Fri
nonstopAmerican Airlines
1h 22mSTL-ORD
6/22Sat
nonstopAmerican Airlines
1h 17mORD-STL
$99
6/23Sun
nonstopAmerican Airlines
1h 22mSTL-ORD
6/26Wed
nonstopAmerican Airlines
1h 13mORD-STL
$108
6/27Thu
1 stopSouthern / Mokulele
17h 40mSTL-ORD
6/28Fri
1 stopSouthern / Mokulele
14h 05mORD-STL
$120
6/21Fri
1 stopSouthern / Mokulele
3h 35mSTL-ORD
6/22Sat
1 stopSouthern / Mokulele
15h 25mORD-STL
$121
6/21Fri
nonstopUnited Airlines
1h 05mDEC-ORD
7/10Wed
nonstopUnited Airlines
1h 01mORD-DEC
$148
6/11Tue
3 stops
31h 15mSTL-ORD
6/13Thu
1 stop
8h 30mORD-STL
$156
6/28Fri
nonstopUnited Airlines
1h 25mSTL-ORD
7/5Fri
nonstopUnited Airlines
1h 23mORD-STL
$157
6/23Sun
1 stop
3h 35mSTL-ORD
6/26Wed
2 stops
23h 12mORD-STL
$159
7/2Tue
1 stopSpirit Airlines
18h 38mSTL-ORD
7/8Mon
2 stopsSpirit Airlines
19h 01mORD-STL
$216
7/2Tue
2 stopsSpirit Airlines
22h 04mSTL-ORD
7/9Tue
1 stopSpirit Airlines
9h 18mORD-STL
$219

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Recent one-way flight deals

6/21Fri
nonstopAmerican Airlines
1h 22mSTL-ORD
$50
6/29Sat
1 stopSouthern / Mokulele
4h 10mSTL-ORD
$56
7/2Tue
1 stopSouthern / Mokulele
3h 35mSTL-ORD
$59
8/27Tue
2 stopsSpirit Airlines
22h 33mSTL-ORD
$71
9/28Sat
1 stopDelta
4h 54mSTL-ORD
$78
9/18Wed
1 stopSpirit Airlines
7h 52mSTL-ORD
$79
7/31Wed
nonstopUnited Airlines
1h 29mSTL-ORD
$89
7/21Sun
nonstopUnited Airlines
1h 05mDEC-ORD
$98
8/10Sat
2 stopsDelta
6h 35mSTL-ORD
$112
6/24Mon
2 stopsSouthwest
12h 55mSTL-ORD
$148

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Search by price

Last minute flights from Illinois to O'Hare Intl

Last minute flight, train and bus deals

6/4Tue
multi-stopSouthern / Mokulele
3h 35mSTL-ORD
6/11Tue
multi-stopSouthern / Mokulele
15h 25mORD-STL
$123
6/5Wed
multi-stopSouthern / Mokulele
19h 40mSTL-ORD
6/6Thu
multi-stopSouthern / Mokulele
19h 20mORD-STL
$135
6/5Wed
multi-stop
14h 52mSTL-ORD
6/13Thu
multi-stop
15h 13mORD-STL
$261
6/4Tue
multi-stop
3h 35mSTL-ORD
6/6Thu
multi-stop
15h 13mORD-STL
$271
6/6Thu
nonstopUnited Airlines
1h 05mDEC-ORD
6/8Sat
nonstopUnited Airlines
1h 01mORD-DEC
$290
6/2Sun
nonstopAmerican Airlines
1h 10mSPI-ORD
6/9Sun
nonstopAmerican Airlines
0h 58mORD-SPI
$358
6/5Wed
nonstopAmerican Airlines
1h 04mMLI-ORD
6/8Sat
nonstopAmerican Airlines
0h 58mORD-MLI
$413
6/4Tue
nonstopUnited Airlines
1h 24mSTL-ORD
6/6Thu
nonstopUnited Airlines
1h 23mORD-STL
$452
6/4Tue
multi-stopDelta
6h 31mSTL-ORD
6/8Sat
multi-stopDelta
5h 46mORD-STL
$535
6/5Wed
multi-stopDelta
6h 31mSTL-ORD
6/6Thu
multi-stopDelta
6h 25mORD-STL
$557

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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:

$712
$777
$1,124
$117

Browse origins:

$509
Flights from Dubuque to Chicago O'Hare Intl Airport
$323
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
$512
Flights from Paducah to Chicago O'Hare Intl Airport
$239
Flights from Peoria, Illinois to Chicago O'Hare Intl Airport
$156
Flights from Quincy, Illinois to Chicago O'Hare Intl Airport
$358
Flights from Springfield, Illinois to Chicago O'Hare Intl Airport
$116
Flights from St. Louis to Chicago O'Hare Intl Airport
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