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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 6/20. 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 6/27
Thu 7/4

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In the last 7 days travelers have searched 42,816,550 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.

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

6/26Wed
nonstopAmerican Airlines
1h 22mSTL-ORD
6/26Wed
nonstopAmerican Airlines
1h 13mORD-STL
$108
8/24Sat
1 stopSouthern / Mokulele
19h 40mSTL-ORD
8/25Sun
1 stopSouthern / Mokulele
14h 05mORD-STL
$114
7/24Wed
nonstopUnited Airlines
1h 29mSTL-ORD
7/31Wed
nonstopUnited Airlines
1h 23mORD-STL
$137
8/4Sun
1 stop
3h 35mSTL-ORD
8/27Tue
1 stop
7h 28mORD-STL
$140
6/26Wed
1 stop
3h 35mSTL-ORD
6/26Wed
2 stops
23h 12mORD-STL
$154
6/20Thu
nonstopUnited Airlines
1h 05mDEC-ORD
6/26Wed
nonstopUnited Airlines
1h 01mORD-DEC
$158
7/2Tue
2 stopsDelta
6h 29mSTL-ORD
7/8Mon
1 stopDelta
4h 26mORD-STL
$222
8/15Thu
1 stopSpirit Airlines
23h 03mSTL-ORD
8/20Tue
2 stopsSpirit Airlines
35h 41mORD-STL
$230
6/12Wed
2 stopsSpirit Airlines
16h 05mSTL-ORD
7/3Wed
2 stopsSpirit Airlines
23h 12mORD-STL
$243
8/4Sun
1 stopDelta
6h 28mSTL-ORD
8/27Tue
2 stopsDelta
9h 57mORD-STL
$302

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Recent one-way flight deals

6/20Thu
nonstopAmerican Airlines
1h 22mSTL-ORD
$50
8/27Tue
1 stopSouthern / Mokulele
3h 35mSTL-ORD
$53
8/27Tue
2 stopsSpirit Airlines
18h 58mSTL-ORD
$73
8/27Tue
3 stopsSpirit Airlines
22h 33mSTL-ORD
$75
8/14Wed
1 stopDelta
4h 14mSTL-ORD
$78
7/15Mon
nonstopUnited Airlines
1h 05mDEC-ORD
$98
8/27Tue
2 stopsDelta
6h 35mSTL-ORD
$112
7/8Mon
2 stops
20h 03mPIA-ORD
$125
6/4Tue
3 stops
24h 51mSTL-ORD
$134
6/3Mon
nonstopUnited Airlines
1h 05mDEC-ORD
$148

Search by stops

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Last minute flights from Illinois to O'Hare Intl

Last minute flight, train and bus deals

5/31Fri
multi-stopSouthern / Mokulele
3h 35mSTL-ORD
6/2Sun
multi-stopSouthern / Mokulele
14h 05mORD-STL
$114
5/29Wed
multi-stopSouthern / Mokulele
3h 35mSTL-ORD
5/30Thu
multi-stopSouthern / Mokulele
14h 05mORD-STL
$117
5/31Fri
multi-stopSouthern / Mokulele
3h 35mSTL-ORD
6/2Sun
multi-stopSouthern / Mokulele
14h 05mORD-STL
$121
5/30Thu
multi-stop
26h 10mSTL-ORD
6/4Tue
multi-stop
32h 05mORD-STL
$175
5/30Thu
multi-stop
14h 40mSTL-ORD
6/4Tue
multi-stop
17h 25mORD-STL
$205
5/30Thu
multi-stopSpirit Airlines
21h 05mSTL-ORD
6/4Tue
multi-stopSpirit Airlines
32h 05mORD-STL
$374
5/29Wed
nonstopUnited Airlines
1h 05mDEC-ORD
6/1Sat
nonstopUnited Airlines
1h 01mORD-DEC
$390
5/28Tue
nonstopUnited Airlines
1h 34mSTL-ORD
6/4Tue
nonstopUnited Airlines
1h 21mORD-STL
$437
5/28Tue
nonstopAmerican Airlines
1h 16mSTL-ORD
6/4Tue
multi-stopAmerican Airlines
4h 40mORD-STL
$445
6/2Sun
nonstopAmerican Airlines
1h 10mSPI-ORD
6/9Sun
nonstopAmerican Airlines
1h 00mORD-SPI
$449

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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
$313
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
$369
Flights from Springfield, Illinois to Chicago O'Hare Intl Airport
$114
Flights from St. Louis to Chicago O'Hare Intl Airport
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