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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

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. Visit our flight page for the latest deals!>/a>

$50 Cheap Flights from Illinois to Chicago O'Hare (ORD)

ORD

Search hundreds of travel sites at once for deals on flights to Chicago O'Hare Airport

...and more

In the last 7 days travelers have searched 41,909,192 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

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

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

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

Book cheap flights from Illinois to Chicago

Recent round-trip flight deals

6/28Fri

nonstopAmerican Airlines

1h 22mSTL-ORD

7/1Mon

nonstopAmerican Airlines

1h 13mORD-STL

$108

7/29Mon

1 stopSouthern / Mokulele

4h 10mSTL-ORD

7/29Mon

1 stopSouthern / Mokulele

14h 05mORD-STL

$113

7/31Wed

nonstopUnited Airlines

1h 34mSTL-ORD

8/3Sat

nonstopUnited Airlines

1h 20mORD-STL

$127

6/15Sat

nonstopUnited Airlines

1h 05mDEC-ORD

6/17Mon

nonstopUnited Airlines

1h 01mORD-DEC

$158

6/28Fri

1 stop

3h 35mSTL-ORD

7/1Mon

2 stops

17h 26mORD-STL

$159

6/25Tue

2 stops

29h 24mSTL-ORD

6/30Sun

1 stop

15h 25mORD-STL

$174

7/2Tue

2 stopsSpirit Airlines

22h 04mSTL-ORD

7/9Tue

1 stopSpirit Airlines

9h 18mORD-STL

$219

6/25Tue

2 stopsSpirit Airlines

22h 17mSTL-ORD

6/30Sun

2 stopsSpirit Airlines

11h 12mORD-STL

$221

8/9Fri

1 stopDelta

4h 08mSTL-ORD

8/12Mon

2 stopsDelta

9h 57mORD-STL

$235

8/4Sun

1 stopDelta

6h 11mSTL-ORD

8/27Tue

2 stopsDelta

9h 57mORD-STL

$302

Recent one-way flight deals

6/21Fri

nonstopAmerican Airlines

1h 22mSTL-ORD

$50

6/21Fri

1 stopSouthern / Mokulele

3h 35mSTL-ORD

$59

9/28Sat

1 stopDelta

6h 37mSTL-ORD

$78

9/18Wed

1 stopSpirit Airlines

7h 52mSTL-ORD

$79

9/18Wed

2 stopsSpirit Airlines

28h 04mSTL-ORD

$87

9/10Tue

nonstopUnited Airlines

1h 21mSTL-ORD

$89

7/29Mon

3 stops

27h 01mPIA-ORD

$127

9/12Thu

nonstopUnited Airlines

1h 21mSTL-ORD

$129

7/29Mon

2 stops

18h 53mPIA-ORD

$130

6/8Sat

2 stopsDelta

6h 43mSTL-ORD

$233

Last minute flights from Illinois to O'Hare Intl

Last minute flight, train and bus deals

6/7Fri

multi-stopSouthern / Mokulele

14h 40mSTL-ORD

6/9Sun

multi-stopSouthern / Mokulele

15h 25mORD-STL

$119

6/6Thu

multi-stopSouthern / Mokulele

14h 40mSTL-ORD

6/9Sun

multi-stopSouthern / Mokulele

15h 25mORD-STL

$123

6/6Thu

multi-stopSouthern / Mokulele

19h 40mSTL-ORD

6/7Fri

multi-stopSouthern / Mokulele

14h 05mORD-STL

$125

6/7Fri

multi-stop

19h 25mSTL-ORD

6/21Fri

multi-stop

22h 06mORD-STL

$236

6/7Fri

multi-stop

19h 25mSTL-ORD

6/21Fri

multi-stop

23h 10mORD-STL

$253

6/3Mon

nonstopAmerican Airlines

1h 10mSPI-ORD

6/9Sun

nonstopAmerican Airlines

0h 58mORD-SPI

$358

6/5Wed

nonstopUnited Airlines

1h 05mDEC-ORD

6/7Fri

nonstopUnited Airlines

1h 01mORD-DEC

$390

6/7Fri

nonstopAmerican Airlines

1h 22mSTL-ORD

6/21Fri

nonstopAmerican Airlines

1h 17mORD-STL

$403

6/3Mon

nonstopUnited Airlines

1h 34mSTL-ORD

6/5Wed

nonstopUnited Airlines

1h 21mORD-STL

$452

6/4Tue

multi-stopDelta

6h 31mSTL-ORD

6/8Sat

multi-stopDelta

5h 46mORD-STL

$535

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:

$250

Flights from Bloomington, Illinois to Chicago O'Hare Intl Airport

$113

Flights from Burlington, Iowa to Chicago O'Hare Intl Airport

$395

Flights from Champaign to Chicago O'Hare Intl Airport

Flights from Chicago to Chicago O'Hare Intl Airport

$148

Flights from Decatur, Illinois to Chicago O'Hare Intl Airport

$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

Browse destinations:

$113

Flights to Chicago O'Hare Intl Airport, Chicago

ORD

$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.

Search hundreds of travel sites at once for deals on flights to Chicago O'Hare Airport

Good to know

Low season

High season

Cheapest flight

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?

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?

What is the Hacker Fare option on flights from Illinois to Chicago O'Hare Airport?

What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Illinois to Chicago O'Hare Airport?

Prefer to fly non-stop from Illinois to Chicago O'Hare Airport?

Illinois to Chicago O'Hare Intl

Chicago O'Hare Intl to Illinois

Book cheap flights from Illinois to Chicago

Recent round-trip flight deals

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Recent one-way flight deals

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Last minute flights from Illinois to O'Hare Intl

Last minute flight, train and bus deals

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Flights to Chicago O'Hare Airport

Destination:

Return flight deals:

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