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

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

$66 CHEAP FLIGHTS from California to Chicago

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago

...and more

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Cheapest round-trip

$131

Overall average: $257

Frontier

Mon 3/16Tue 3/24

LAS - ORD • Non-stop

Cheapest one-way

$66

Typical prices: $163-$259

Frontier

Tue 3/17

ONT - ORD • 1 stop

Start a new search

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We hope you love your trip to Chicago!

Flight Deals

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

Mon, Mar 16 - Tue, Mar 24

12:25 am - 6:08 am

LAS

ORD

3h 43mnonstop

8:55 pm - 11:15 pm

ORD

LAS

4h 20mnonstop

$131Frontier

Thu, Feb 12 - Mon, Feb 23

3:11 pm - 9:03 pm

LAS

ORD

3h 52mnonstop

7:19 pm - 9:42 pm

ORD

LAS

4h 23mnonstop

$133Frontier

Mon, Mar 9 - Tue, Mar 31

12:25 am - 6:08 am

LAS

ORD

3h 43mnonstop

9:45 am - 11:09 pm

ORD

LAS

15h 24m

1 stop

$135Multiple Airlines

Wed, Apr 29 - Sun, May 3

12:59 am - 6:47 am

LAS

ORD

3h 48mnonstop

8:53 pm - 10:54 pm

ORD

LAS

4h 01mnonstop

$140Multiple Airlines

Wed, Mar 4 - Wed, Mar 18

8:35 am - 2:58 pm

SAN

ORD

4h 23mnonstop

4:10 pm - 6:55 pm

ORD

SAN

4h 45mnonstop

$157Alaska Airlines

Thu, Apr 9 - Sat, Apr 18

3:07 pm - 9:28 pm

SAN

ORD

4h 21mnonstop

8:45 pm - 11:16 pm

ORD

SAN

4h 31mnonstop

$165American Airlines

Wed, Apr 22 - Sun, Apr 26

2:05 pm - 8:17 pm

SAN

ORD

4h 12mnonstop

7:00 am - 9:40 am

ORD

SAN

4h 40mnonstop

$167United Airlines

Fri, May 15 - Wed, May 20

3:07 pm - 9:28 pm

SAN

ORD

4h 21mnonstop

8:45 pm - 11:16 pm

ORD

SAN

4h 31mnonstop

$168American Airlines

Tue, May 12 - Tue, May 19

10:21 am - 7:03 pm

SJC

ORD

6h 42m

1 stop

3:43 pm - 11:37 pm

ORD

SJC

9h 54m

1 stop

$223Alaska Airlines

Tue, Mar 3 - Mon, Mar 9

5:03 pm - 11:26 pm

SFO

ORD

4h 23mnonstop

6:17 am - 9:22 am

ORD

SFO

5h 05mnonstop

$250United Airlines

Useful Info

Low season	January
High season	July
Cheapest flight	$66

Best time to beat the crowds but there is an average 13% increase in price.

Most popular time to fly and prices are also 2% lower on average.

Flight from Ontario to Chicago O'Hare Airport

StephenFlew with United Airlines

SMF

ORD

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

SAN

ORD

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

LAX

ORD

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

SFO

ORD

Oct 2024

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

KimFlew with American Airlines

SNA

ORD

Nov 2024

Bring extra foods and buy extra drinks bring your meds

ShirleyFlew with United Airlines

LAX

ORD

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

Saint Joseph

Hammond

Portage

Lansing

Valparaiso

Chesterton

Schererville

Munster

Porter

Monticello

Griffith

Saint John

Everything you need to know for your flight to Chicago

Cabin class

Complete your trip

Direct Flights

Flights to other cities

Origins

Other airports

Return flight deals

Cabin class types available on flights to California

First Class flights to Chicagofrom $563

Business Class flights to Chicagofrom $579

Premium Economy Class flights to Chicagofrom $723

Economy Class flights to Chicagofrom $157

$66 Find Cheap Flights from California to Chicago

KAYAK searches hundreds of travel sites at once for deals on flights to Chicago

Everything you should know

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

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

FAQs for booking flights from California to Chicago

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.

Traveling to a place near Chicago?

Everything you need to know for your flight to Chicago

Cabin class types available on flights to California

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

Find direct flights for Chicago

Flights to other popular destinations

Flights from domestic origins to Chicago

Choose which airport to fly into in Chicago

Find deals for your return flight