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.

$99 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

Fri, Oct 16 - Mon, Oct 19

11:29 pm - 5:16 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 47mnonstop

3:30 pm - 5:46 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 16mnonstop

$176Frontier

Fri, Oct 16 - Sun, Oct 18

11:29 pm - 5:16 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 47mnonstop

3:30 pm - 5:46 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 16mnonstop

$176Frontier

Sat, Oct 10 - Wed, Oct 14

12:21 am - 6:34 amLAX Los Angeles-ORD Chicago O'Hare Intl

4h 13mnonstop

9:00 am - 5:59 pmORD Chicago O'Hare Intl-LAX Los Angeles

10h 59m1 stop Seattle/Tacoma Intl

$198Multiple Airlines

Sat, Oct 10 - Wed, Oct 14

12:21 am - 6:34 amLAX Los Angeles-ORD Chicago O'Hare Intl

4h 13mnonstop

3:49 pm - 9:54 pmORD Chicago O'Hare Intl-LAX Los Angeles

8h 05m1 stop Seattle/Tacoma Intl

$198Multiple Airlines

Sat, Oct 3 - Tue, Oct 6

8:45 am - 5:05 pmLAX Los Angeles-ORD Chicago O'Hare Intl

6h 20m1 stop Denver Intl

8:50 am - 11:23 amORD Chicago O'Hare Intl-LAX Los Angeles

4h 33mnonstop

$204United Airlines

Tue, Oct 6 - Tue, Oct 13

5:30 am - 11:46 amLAX Los Angeles-ORD Chicago O'Hare Intl

4h 16mnonstop

6:00 am - 8:27 amORD Chicago O'Hare Intl-LAX Los Angeles

4h 27mnonstop

$217United Airlines

Sat, Oct 24 - Mon, Oct 26

5:45 am - 11:35 amLAX Los Angeles-MDW Chicago Midway

3h 50mnonstop

9:20 pm - 11:55 pmMDW Chicago Midway-LAX Los Angeles

4h 35mnonstop

$217Southwest

Tue, Oct 6 - Sat, Oct 10

11:55 pm - 5:50 amLAX Los Angeles-MDW Chicago Midway

3h 55mnonstop

7:45 pm - 10:15 pmMDW Chicago Midway-LAX Los Angeles

4h 30mnonstop

$217Southwest

Tue, Nov 3 - Sat, Nov 7

9:59 am - 11:57 pmLAX Los Angeles-ORD Chicago O'Hare Intl

11h 58m1 stop Fort Lauderdale

2:42 pm - 11:53 pmORD Chicago O'Hare Intl-LAX Los Angeles

11h 11m1 stop Fort Lauderdale

$217JetBlue

Tue, Nov 3 - Thu, Nov 5

9:59 am - 11:57 pmLAX Los Angeles-ORD Chicago O'Hare Intl

11h 58m1 stop Fort Lauderdale

2:42 pm - 11:56 pmORD Chicago O'Hare Intl-LAX Los Angeles

11h 14m1 stop Fort Lauderdale

$217JetBlue

Recent last minute flight deals from California to Chicago

Wed, Sep 9 - Sat, Sep 12

11:50 pm - 5:38 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 48mnonstop

6:30 am - 7:38 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

15h 08m1 stop Denver Intl

$195Frontier

Wed, Sep 9 - Fri, Sep 11

3:10 pm - 12:23 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

7h 13m1 stop Denver Intl

8:55 pm - 11:05 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 10mnonstop

$195Frontier

Wed, Sep 9 - Wed, Oct 14

5:25 pm - 11:31 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 06mnonstop

2:45 pm - 5:16 pmORD Chicago O'Hare Intl-LAX Los Angeles

4h 31mnonstop

$271Delta

Wed, Sep 9 - Tue, Oct 13

8:00 am - 2:20 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 20mnonstop

8:30 pm - 11:13 pmORD Chicago O'Hare Intl-LAX Los Angeles

4h 43mnonstop

$271American Airlines

Wed, Sep 9 - Fri, Sep 11

8:45 am - 7:21 pmLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

8h 36m1 stop San Diego

10:26 am - 10:45 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

14h 19m1 stop Atlanta Hartsfield-Jackson

$287Multiple Airlines

Sun, Sep 13 - Thu, Sep 17

1:04 pm - 11:43 pmONT Ontario-ORD Chicago O'Hare Intl

8h 39m1 stop Phoenix Sky Harbor Intl

5:00 am - 9:29 amORD Chicago O'Hare Intl-ONT Ontario

6h 29m1 stop Dallas/Fort Worth

$297American Airlines

Wed, Sep 9 - Sun, Sep 13

1:56 pm - 11:05 pmONT Ontario-ORD Chicago O'Hare Intl

7h 09m1 stop San Francisco

6:00 am - 12:12 pmORD Chicago O'Hare Intl-ONT Ontario

8h 12m1 stop San Francisco

$297United Airlines

Fri, Sep 11 - Tue, Sep 15

6:00 pm - 8:38 amONT Ontario-ORD Chicago O'Hare Intl

12h 38m2 stops Seattle/Tacoma Intl Minneapolis St Paul

7:40 pm - 11:47 pmORD Chicago O'Hare Intl-ONT Ontario

6h 07m1 stop Salt Lake City

$302Delta

Sat, Sep 12 - Sat, Oct 3

1:18 pm - 9:29 pmONT Ontario-ORD Chicago O'Hare Intl

6h 11m1 stop Denver Intl

8:20 pm - 10:49 pmORD Chicago O'Hare Intl-ONT Ontario

4h 29mnonstop

$307United Airlines

Sat, Sep 12 - Tue, Mar 23

11:50 pm - 9:20 amLAX Los Angeles-ORD Chicago O'Hare Intl

7h 30m1 stop Atlanta Hartsfield-Jackson

2:03 pm - 8:11 pmORD Chicago O'Hare Intl-LAX Los Angeles

8h 08m1 stop Portland

$315Multiple Airlines

Recent direct flight deals from California to Chicago

Fri, Oct 16 - Sun, Oct 18

11:29 pm - 5:16 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 47mnonstop

3:30 pm - 5:46 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 16mnonstop

$176Frontier

Fri, Nov 13 - Sun, Nov 15

11:29 pm - 5:13 amLAS Las Vegas Harry Reid Intl-ORD Chicago O'Hare Intl

3h 44mnonstop

5:15 pm - 7:36 pmORD Chicago O'Hare Intl-LAS Las Vegas Harry Reid Intl

4h 21mnonstop

$176Frontier

Fri, Nov 13 - Sun, Nov 15

5:59 pm - 11:55 pmLAX Los Angeles-ORD Chicago O'Hare Intl

3h 56mnonstop

6:28 pm - 9:05 pmORD Chicago O'Hare Intl-LAX Los Angeles

4h 37mnonstop

$217Delta

Sat, Oct 10 - Sat, Oct 17

3:00 pm - 9:02 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 02mnonstop

4:30 pm - 7:02 pmORD Chicago O'Hare Intl-LAX Los Angeles

4h 32mnonstop

$217Delta

Tue, Oct 6 - Tue, Oct 13

5:30 am - 11:46 amLAX Los Angeles-ORD Chicago O'Hare Intl

4h 16mnonstop

6:00 am - 8:27 amORD Chicago O'Hare Intl-LAX Los Angeles

4h 27mnonstop

$217United Airlines

Wed, Oct 21 - Sun, Oct 25

12:45 pm - 7:05 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 20mnonstop

5:55 am - 8:33 amORD Chicago O'Hare Intl-LAX Los Angeles

4h 38mnonstop

$217United Airlines

Thu, Nov 5 - Wed, Nov 11

6:02 am - 12:21 pmLAX Los Angeles-ORD Chicago O'Hare Intl

4h 19mnonstop

10:30 am - 1:09 pmORD Chicago O'Hare Intl-LAX Los Angeles

4h 39mnonstop

$217American Airlines

Wed, Oct 7 - Wed, Oct 14

6:22 pm - 12:30 amLAX Los Angeles-ORD Chicago O'Hare Intl

4h 08mnonstop

6:00 am - 8:38 amORD Chicago O'Hare Intl-LAX Los Angeles

4h 38mnonstop

$217American Airlines

Sat, Oct 24 - Mon, Oct 26

5:45 am - 11:35 amLAX Los Angeles-MDW Chicago Midway

3h 50mnonstop

9:20 pm - 11:55 pmMDW Chicago Midway-LAX Los Angeles

4h 35mnonstop

$217Southwest

Tue, Oct 6 - Sat, Oct 10

11:55 pm - 5:50 amLAX Los Angeles-MDW Chicago Midway

3h 55mnonstop

7:45 pm - 10:15 pmMDW Chicago Midway-LAX Los Angeles

4h 30mnonstop

$217Southwest

Useful Info

Low season	January
High season	June
Cheapest flight	$99

Best time to beat the crowds but there is an average 3% increase in price.

Most popular time to fly with an average 12% 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

Munster

Schererville

Chesterton

Porter

Monticello

Saint John

Griffith

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$99 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

Good to know

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

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Find deals for your return flight