How does KAYAK find such low prices on flights from California to Chicago?

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 California to Chicago.

How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from California to Chicago?

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from California 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 California to Chicago?

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 with an airline and back to California with another airline.

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

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 from California up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

$109 CHEAP FLIGHTS from California to Chicago

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Cheap Flights from California to Chicago

Discover the best prices for you by selecting your travel dates on KAYAK.

Round-trip

One-way

Last minute

Direct

Recent round-trip flight deals from California to Chicago

Sat, Feb 20 - Wed, Feb 24

12:47 am - 7:05 amLAX Los Angeles-ORD Chicago O'Hare Intl

4h 18mnonstop

5:40 am - 8:24 amORD Chicago O'Hare Intl-LAX Los Angeles

4h 44mnonstop

$216Frontier

Thu, Dec 3 - Tue, Dec 8

4:25 pm - 12:53 amLAX Los Angeles-ORD Chicago O'Hare Intl

6h 28m1 stop Denver Intl

7:25 am - 3:21 pmORD Chicago O'Hare Intl-LAX Los Angeles

9h 56m1 stop Denver Intl

$216Frontier

Tue, Dec 15 - Tue, Dec 22

4:16 pm - 12:54 amLAX Los Angeles-ORD Chicago O'Hare Intl

6h 38m1 stop Denver Intl

8:59 pm - 8:44 amORD Chicago O'Hare Intl-LAX Los Angeles

13h 45m1 stop Seattle/Tacoma Intl

$228Multiple Airlines

Fri, Dec 4 - Wed, Dec 9

1:10 pm - 10:59 pmLAX Los Angeles-ORD Chicago O'Hare Intl

7h 49m1 stop San Francisco

8:45 am - 11:24 amORD Chicago O'Hare Intl-LAX Los Angeles

4h 39mnonstop

$233United Airlines

Tue, Jan 5 - Tue, Jan 12

5:59 pm - 1:13 pmLAX Los Angeles-ORD Chicago O'Hare Intl

17h 14m1 stop Portland

6:10 am - 11:24 amORD Chicago O'Hare Intl-LAX Los Angeles

7h 14m1 stop Denver Intl

$235Multiple Airlines

Tue, Feb 9 - Tue, Feb 16

12:40 pm - 6:55 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 15mnonstop

8:06 pm - 10:59 pmORD Chicago O'Hare Intl-LAX Los Angeles

4h 53mnonstop

$247United Airlines

Wed, Jan 13 - Sat, Jan 23

11:55 pm - 5:55 amLAX Los Angeles-MDW Chicago Midway

4h 00mnonstop

6:20 pm - 8:45 pmMDW Chicago Midway-LAX Los Angeles

4h 25mnonstop

$247Southwest

Wed, Dec 9 - Tue, Dec 15

6:05 am - 12:10 pmLAX Los Angeles-MDW Chicago Midway

4h 05mnonstop

10:05 am - 12:30 pmMDW Chicago Midway-LAX Los Angeles

4h 25mnonstop

$247Southwest

Sat, Jan 16 - Sat, Jan 23

7:11 am - 1:31 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 20mnonstop

10:30 am - 1:35 pmORD Chicago O'Hare Intl-LAX Los Angeles

5h 05mnonstop

$247American Airlines

Sat, Jan 9 - Sat, Jan 16

6:11 am - 12:30 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 19mnonstop

8:15 am - 11:09 amORD Chicago O'Hare Intl-LAX Los Angeles

4h 54mnonstop

$247American Airlines

Recent last minute flight deals from California to Chicago

Thu, Nov 12 - Wed, Dec 9

8:20 pm - 5:13 amSAN San Diego-ORD Chicago O'Hare Intl

6h 53m1 stop Las Vegas Harry Reid Intl

7:25 am - 11:58 pmORD Chicago O'Hare Intl-SAN San Diego

18h 33m1 stop Denver Intl

$265Frontier

Tue, Nov 17 - Sat, Dec 12

6:25 am - 12:21 amSAN San Diego-ORD Chicago O'Hare Intl

15h 56m1 stop Denver Intl

7:25 am - 11:58 pmORD Chicago O'Hare Intl-SAN San Diego

18h 33m1 stop Denver Intl

$265Frontier

Thu, Nov 12 - Wed, Dec 9

8:20 pm - 5:13 amSAN San Diego-ORD Chicago O'Hare Intl

6h 53m1 stop Las Vegas Harry Reid Intl

2:13 pm - 5:00 pmORD Chicago O'Hare Intl-SAN San Diego

4h 47mnonstop

$318Multiple Airlines

Tue, Nov 17 - Tue, Dec 1

12:41 pm - 6:59 pmSAN San Diego-ORD Chicago O'Hare Intl

4h 18mnonstop

6:21 am - 11:37 amORD Chicago O'Hare Intl-SAN San Diego

7h 16m1 stop Las Vegas Harry Reid Intl

$329Multiple Airlines

Fri, Nov 13 - Sat, Nov 14

4:17 pm - 12:59 amONT Ontario-ORD Chicago O'Hare Intl

6h 42m1 stop San Francisco

4:15 pm - 6:47 pmORD Chicago O'Hare Intl-ONT Ontario

4h 32mnonstop

$337United Airlines

Fri, Nov 13 - Sat, Nov 14

5:00 am - 2:55 pmONT Ontario-ORD Chicago O'Hare Intl

7h 55m1 stop Denver Intl

4:15 pm - 6:47 pmORD Chicago O'Hare Intl-ONT Ontario

4h 32mnonstop

$337United Airlines

Tue, Nov 17 - Sun, Dec 6

1:15 pm - 9:47 pmONT Ontario-ORD Chicago O'Hare Intl

6h 32m1 stop Salt Lake City

7:25 am - 12:17 pmORD Chicago O'Hare Intl-ONT Ontario

6h 52m1 stop Salt Lake City

$347Delta

Mon, Nov 16 - Sat, Nov 21

12:18 pm - 11:54 pmONT Ontario-ORD Chicago O'Hare Intl

9h 36m1 stop Atlanta Hartsfield-Jackson

7:05 am - 12:20 pmORD Chicago O'Hare Intl-ONT Ontario

7h 15m1 stop Salt Lake City

$347Delta

Sat, Nov 14 - Tue, Dec 8

12:41 pm - 6:59 pmSAN San Diego-ORD Chicago O'Hare Intl

4h 18mnonstop

7:27 am - 10:12 amORD Chicago O'Hare Intl-SAN San Diego

4h 45mnonstop

$367Alaska Airlines

Sat, Nov 14 - Sat, Dec 12

7:02 am - 1:17 pmSAN San Diego-ORD Chicago O'Hare Intl

4h 15mnonstop

7:27 am - 10:12 amORD Chicago O'Hare Intl-SAN San Diego

4h 45mnonstop

$367Alaska Airlines

Useful Info

Low season	January
High season	June
Cheapest flight	$109

Best time to beat the crowds but there is an average 2% increase in price.

Most popular time to fly with an average 10% increase in price.

Flight from Ontario to Chicago O'Hare Airport

CupcakeFlew with Alaska Airlines-Apr 2026

Please bring a water bottle for hydration during the flight.

StephenFlew with United Airlines-Jan 2026

If you're trying to make a connecting flight make sure you allow PLENTY of time between flights or be prepared to miss the next flight. Make sure to use the restroom at the last possible moment before landing because you could be sitting on the taxiway for 5 more minutes... 5 more minutes... 5 more minutes... until it's been nearly 2 hours. Don't trust the airline provided ETA provided by apps they don't update it until long after you're delayed. If someone is showing up to give you a ride, make sure they have hours to wait for you.

RodFlew with United Airlines-Sep 2024

Yes! Don’t reserve a flight with less than 1 1/2 hour connection time or you have a good possibility of missing your connection.

FrancisFlew with United Airlines-Sep 2024

Check the weather, or bring a. Raincoat! Being from sunny California, I forget it isn’t always sunshine in other states!

GeraldFlew with Alaska Airlines-Oct 2024

Book a flight as early in the day as possible to avoid incoming flight delays.

KimFlew with American Airlines-Nov 2024

Bring extra foods and buy extra drinks bring your meds

ShirleyFlew with United Airlines-May 2024

Check-in using the United AirLines app to access your boarding pass. Arrive at least two hours early at LAX airport.

How does KAYAK find such low prices on flights from California to Chicago?
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 California to Chicago.
How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from California to Chicago?
KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Chicago from California 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 California to Chicago?
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 with an airline and back to California with another airline.
What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from California to Chicago?
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 from California up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Merrillville

Hammond

Saint Joseph

Portage

Lansing

Valparaiso

Chesterton

Munster

Schererville

Porter

Monticello

Saint John

Griffith

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$109 Find Cheap Flights from California to Chicago - Compare and Save

Cheap Flights from California to Chicago

Recent round-trip flight deals from California to Chicago

Recent one-way flight deals from California to Chicago

Recent last minute flight deals from California to Chicago

Recent direct flight deals from California to Chicago

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Low season

High season

Cheapest flight

Flights from California to Chicago: the best tips from KAYAK users

FAQs for booking flights from California to Chicago

Traveling to a place near Chicago?

More options for your flight to Chicago

Complete your trip to Chicago with a hotel stay or car rental

Cabin class types available on flights to California

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Flights from domestic origins to Chicago

Choose which airport to fly into in Chicago

Flights to other popular destinations

Find deals for your return flight