How long is the flight from Illinois to California?

Flight times from Illinois to California vary, but if you’re flying out of Chicago and flying into Los Angeles (one of the most popular routes), then the duration is 4h 18m on average. Another popular route from Illinois to California is flying from Peoria to Los Angeles, which will take roughly 6h 31m. Keep in mind that layovers or delays could extend your travel time.

What airlines fly to California?

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to California from Illinois according to our data. American Airlines is the first choice among our users, with 41% of people opting to fly with this airline when traveling to California. Keep in mind that there are 8 different airlines that fly to California on a routine basis, so you have a few additional options to choose from.

How many flights depart from Illinois to California on average per day?

As of July 2026, 326 flights take off from Illinois and land in California each day. The most common flight departure time for this route is 8:00PM, with 36% of daily flights taking off in the evening.

How many flights depart from Illinois to California on average per week?

As of July 2026, there are 2,285 flights per week flying from Illinois to California. The most common day of the week flights depart is Thu, with 17% of flights taking off on this day.

What is the cheapest airline that flies from Illinois to California?

Frontier, Southwest, and Delta are the most popular carriers operating from Illinois to California

When did momondo last update prices for flights from Illinois to California?

Prices for flights from Illinois to California were last updated today.

How many operators does momondo search for flights from Illinois to California?

There are 9 operators available for flights from Illinois to California as of July 2026.

How old do you have to be to fly from Illinois to California?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to California.

What documentation or ID do you need to fly to California?

The travel and health documents you'll need for your trip to California may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at California. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$49 Cheap Flights from Illinois to California in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Illinois to California

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:10 pm - 11:31 pm

STL

LAS

5h 21m

1 stop

5:18 pm - 10:39 pm

LAS

STL

3h 21mnonstop

$136Frontier

Tue, Oct 20 - Tue, Oct 27

2:41 pm - 11:50 pm

ORD

ONT

11h 09m

1 stop

6:00 am - 1:36 pm

ONT

ORD

29h 36m

1 stop

$169Frontier

Mon, Aug 24 - Mon, Aug 31

9:05 pm - 11:45 pm

ORD

SFO

4h 40mnonstop

2:48 pm - 9:35 pm

SFO

ORD

4h 47mnonstop

$277American Airlines

Tue, Aug 11 - Tue, Aug 25

9:10 pm - 11:45 pm

MDW

SFO

4h 35mnonstop

11:40 pm - 5:50 am

SFO

MDW

4h 10mnonstop

$277Southwest

Thu, Aug 13 - Tue, Aug 18

9:05 pm - 11:45 pm

ORD

SFO

4h 40mnonstop

5:07 pm - 11:30 pm

SFO

ORD

4h 23mnonstop

$278American Airlines

Thu, Aug 13 - Wed, Aug 19

3:10 pm - 9:10 pm

MDW

SFO

8h 00m

2 stops

11:05 pm - 8:45 am

SFO

MDW

7h 40m

1 stop

$278Southwest

Tue, Aug 18 - Sat, Aug 22

6:20 am - 11:49 am

ORD

SFO

7h 29m

1 stop

11:52 am - 11:36 pm

SFO

ORD

9h 44m

1 stop

$286Alaska Airlines

Wed, Aug 5 - Wed, Aug 12

7:49 pm - 10:27 pm

ORD

SAN

4h 38mnonstop

12:39 pm - 7:00 pm

SAN

ORD

4h 21mnonstop

$287Alaska Airlines

Fri, Oct 30 - Thu, Nov 5

5:00 am - 9:07 am

ORD

SNA

6h 07m

1 stop

2:03 pm - 8:06 pm

SNA

ORD

4h 03mnonstop

$315United Airlines

Sun, Aug 30 - Sat, Dec 12

5:51 pm - 10:17 pm

ORD

SNA

6h 26m

1 stop

2:10 pm - 8:24 pm

SNA

ORD

4h 14mnonstop

$319United Airlines

Fri, Aug 28 - Wed, Sep 2

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Frontier flights from Illinois to California

Our best Frontier deals on Illinois to California flight tickets

Frontier

Aug 24

ORD2:41 pmChicago O'Hare Intl

11h 09m

1 stop

ONT11:50 pmOntario

Aug 31

ONT6:00 amOntario

29h 36m

1 stop

ORD1:36 pmChicago O'Hare Intl

$169

Frontier

Aug 24

STL7:58 pmLambert-St Louis

17h 02m

1 stop

LAS11:00 amLas Vegas Harry Reid Intl

Aug 30

LAS12:57 amLas Vegas Harry Reid Intl

16h 16m

1 stop

STL7:13 pmLambert-St Louis

$182

Frontier

Aug 11

STL8:08 pmLambert-St Louis

16h 52m

1 stop

LAS11:00 amLas Vegas Harry Reid Intl

Aug 17

LAS6:00 amLas Vegas Harry Reid Intl

11h 23m

1 stop

STL7:23 pmLambert-St Louis

$183

Delta flights from Illinois to California

Our best Delta deals on Illinois to California flight tickets

Delta

Aug 29

MDW1:25 pmChicago Midway

8h 44m

1 stop

LAX8:09 pmLos Angeles

Sep 2

LAX6:00 amLos Angeles

8h 59m

1 stop

MDW4:59 pmChicago Midway

$297

Delta

Aug 13

ORD5:56 pmChicago O'Hare Intl

7h 54m

1 stop

SFO11:50 pmSan Francisco

Aug 15

SFO6:00 amSan Francisco

8h 51m

1 stop

ORD4:51 pmChicago O'Hare Intl

$298

Delta

Oct 30

MDW1:28 pmChicago Midway

6h 52m

1 stop

SFO6:20 pmSan Francisco

Nov 2

SFO10:59 pmSan Francisco

8h 19m

1 stop

MDW9:18 amChicago Midway

$303

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

St. LouisLas Vegas

STL - LAS

STLLAS

Lambert-St Louis

Tue 10/20

8:10 pm-11:31 pm

1 stop5h 21m

Las Vegas Harry Reid Intl

Tue 10/27

5:18 pm-10:39 pm

Nonstop3h 21m

$136

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Mon 8/24

2:41 pm-11:50 pm

1 stop11h 09m

Ontario

Mon 8/31

6:00 am-1:36 pm

1 stop29h 36m

$169

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Tue 8/11

9:05 pm-11:45 pm

Nonstop4h 40m

San Francisco

Tue 8/25

2:48 pm-9:35 pm

Nonstop4h 47m

$277

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Thu 8/13

9:10 pm-11:45 pm

Nonstop4h 35m

San Francisco

Tue 8/18

11:40 pm-5:50 am

Nonstop4h 10m

$277

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Thu 8/13

9:05 pm-11:45 pm

Nonstop4h 40m

San Francisco

Wed 8/19

5:07 pm-11:30 pm

Nonstop4h 23m

$278

ChicagoSan Francisco

MDW - SFO

MDWSFO

Chicago Midway

Tue 8/18

3:10 pm-9:10 pm

2 stops8h 00m

San Francisco

Sat 8/22

11:05 pm-8:45 am

1 stop7h 40m

$278

ChicagoSan Francisco

ORD - SFO

ORDSFO

Chicago O'Hare Intl

Wed 8/5

6:20 am-11:49 am

1 stop7h 29m

San Francisco

Wed 8/12

11:52 am-11:36 pm

1 stop9h 44m

$286

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Fri 10/30

7:49 pm-10:27 pm

Nonstop4h 38m

San Diego

Thu 11/5

12:39 pm-7:00 pm

Nonstop4h 21m

$287

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Sun 8/30

5:00 am-9:07 am

1 stop6h 07m

Santa Ana J. Wayne/Orange Cnty

Sat 12/12

2:03 pm-8:06 pm

Nonstop4h 03m

$315

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Fri 8/28

5:51 pm-10:17 pm

1 stop6h 26m

Santa Ana J. Wayne/Orange Cnty

Wed 9/2

2:10 pm-8:24 pm

Nonstop4h 14m

$319

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Illinois to California

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to California?

The month of October is another great option to travel to California, with average flight prices from Illinois averaging around $321.

What is the cheapest day to depart on your flight to California?

The cheapest day to depart from Illinois to California is on a Thursday. Travelers who choose to depart for California on a Thursday will often find tickets for as low as $385. Be sure to avoid booking your departure on a Monday as prices are generally higher than usual. According to our data, the average ticket price to California on Monday is $506.

What is the cheapest time of day to depart on your flight to California?

The cheapest time of day to fly to California is in the evening when flights can be purchased for as low as $344. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are $774 on average. Flights to California from Illinois in the afternoon are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Illinois to California flight route?

Fly from Chicago O'Hare Intl to Ontario for the best Illinois - California flight prices

How far in advance should I book a flight from Illinois to California?

You are more likely to see cheaper flights to California from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to California for around $316 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to California from Illinois for as low as $264 on momondo.

What cabin class options are available on Illinois to California flights?

There are 4 cabin classes available to choose from on Illinois to California flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Illinois to California flights?

You could potentially save up to 40% on your flight if you consider stops on a Illinois to California flight.

Cheap Illinois to California flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Illinois to California

Best Price Found	$119
Fastest flight time	3h 24m
Direct flights	Every day
Airports in California	418 airports

The best one-way flight to California from Illinois in the past 72 hours is $119. The best round-trip flight deal from Illinois to California found on momondo in the last 72 hours is $268.

The fastest flight from Illinois to California takes 3h 24m

Direct flights go from Illinois to California every day.

There are 418 airports in California. From Illinois there are direct flights to Las Vegas Harry Reid Intl (LAS).

Search flight deals

Frequently asked questions about flying from Illinois to California

When did momondo last update prices for flights from Illinois to California?
Prices for flights from Illinois to California were last updated today.
How many operators does momondo search for flights from Illinois to California?
There are 9 operators available for flights from Illinois to California as of July 2026.
How old do you have to be to fly from Illinois to California?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Illinois to California.
What documentation or ID do you need to fly to California?
The travel and health documents you'll need for your trip to California may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at California. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Illinois to California?
Based on momondo bookings for flights between Illinois and California, the leading plane model is Airbus A321neo, making up 15.79% of the total bookings. Other popular models include Boeing 737-800 with 15.48%, Airbus A321-100/200 with 14.02%, and Boeing 737-900 with 9.84%.

Best airlines flying from Illinois to California

Compare and see reviews for airlines that fly from Illinois to California with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $80	Free Cancellation	Rating 5.6 2,799 reviews	Search Frontier flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.8 8,471 reviews	Search Delta flights
Hawaiian Airlines	PriceFrom $138	Free Cancellation	Rating 7.8 2,823 reviews	Search Hawaiian Airlines flights
Southwest	PriceFrom $138	Free Cancellation	Rating 8.0 4,244 reviews	Search Southwest flights
Alaska Airlines	PriceFrom $139	Free Cancellation	Rating 7.9 12,657 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $156	Free Cancellation	Rating 7.1 11,813 reviews	Search American Airlines flights
United Airlines	PriceFrom $157	Free Cancellation	Rating 7.4 9,993 reviews	Search United Airlines flights
JetBlue	PriceFrom $159	Free Cancellation	Rating 7.1 3,008 reviews	Search JetBlue flights

Why use momondo?

Why should I use momondo to find a flight deal from Illinois to California?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Illinois to California. momondo saves you time and could save you money on your trip.

Can I find flights from Illinois to California with flexible booking policies on momondo?

Yes. All flights to California from Illinois on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Illinois to California?

Once all potential Illinois to California flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Illinois to California right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Illinois to California now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to California and let you know when they change.

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Popular cities in California

Flights to New Yorkfrom $81

Flights to Los Angelesfrom $55

Flights to Orlandofrom $55

Flights to Miamifrom $65

Flights to Chicagofrom $61

Flights to San Franciscofrom $55

Flights to Las Vegasfrom $46

Flights to Washington, D.C.from $56

Flights to Bostonfrom $78

Flights to Atlantafrom $55

Flights to Fort Lauderdalefrom $56

Flights to Dallasfrom $62

Cheap flights from Illinois to California from $49

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Illinois to California departing on 10/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Frontier flights from Illinois to California

Our best Frontier deals on Illinois to California flight tickets

Delta flights from Illinois to California

Our best Delta deals on Illinois to California flight tickets

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See travel insights to California from

How to get the cheapest flight ticket from Illinois to California

What is the cheapest month to fly to California?

What is the cheapest day to depart on your flight to California?

What is the cheapest time of day to depart on your flight to California?

What is the cheapest Illinois to California flight route?

How far in advance should I book a flight from Illinois to California?

What cabin class options are available on Illinois to California flights?

Can stopping save me money on Illinois to California flights?

What is the cheapest airline that flies from Illinois to California?

What airlines fly to California?

How many flights depart from Illinois to California on average per day?

How many flights depart from Illinois to California on average per week?

How long is the flight from Illinois to California?

Cheap Illinois to California flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Airports in California

Frequently asked questions about flying from Illinois to California

Best airlines flying from Illinois to California

Compare and see reviews for airlines that fly from Illinois to California with momondo

Why use momondo?

An easier way to manage your California trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to California

Popular cities in California

Popular flights according to clicks in the last 7 days on momondo

Illinois flight routes

According to popular flight searches on momondo this year

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According to popular flight searches on momondo this year

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