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

As of May 2026, 1,583 flights take off from California and land in Illinois each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.

How long is the flight from California to Illinois?

The flight from California to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Los Angeles (a popular airport in California) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 3h 59m on average. If you fly from Ontario (another popular airport in California) to Chicago O'Hare Intl Airport, then the average flight time is 4h 03m.

What airlines fly to Illinois?

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Illinois from California according to our data. American Airlines is the first choice among our users, with 44% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 9 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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

As of May 2026, there are 226 flights per day flying from California to Illinois. The most common time of day flights depart is 10:00AM, with 43% of flights taking off at noon.

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

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

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

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

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

As of May 2026, there are 9 operators available to choose from for flights from California to Illinois.

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

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to Illinois.

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

The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

$76 Cheap Flights from California to Illinois in 2026

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from California to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:55 pm - 5:55 am

LAX

MDW

4h 00mnonstop

8:50 pm - 11:10 pm

MDW

LAX

4h 20mnonstop

$199Southwest

Tue, Aug 25 - Tue, Sep 1

11:29 am - 5:40 pm

LAX

ORD

4h 11mnonstop

2:36 pm - 5:08 pm

ORD

LAX

4h 32mnonstop

$199Delta

Wed, Aug 12 - Wed, Aug 19

9:44 am - 12:49 am

LAX

ORD

13h 05m

1 stop

9:13 pm - 11:57 pm

ORD

LAX

4h 44mnonstop

$200Frontier

Sun, Jul 19 - Wed, Jul 22

9:43 am - 8:53 pm

LAX

ORD

9h 10m

1 stop

9:07 pm - 11:43 pm

ORD

LAX

4h 36mnonstop

$201Frontier

Tue, Aug 18 - Sat, Aug 22

6:15 am - 12:28 pm

SAN

ORD

4h 13mnonstop

9:17 pm - 11:48 pm

ORD

SAN

4h 31mnonstop

$247American Airlines

Sat, Jun 6 - Tue, Jun 9

3:15 pm - 11:36 pm

SJC

ORD

6h 21m

1 stop

7:59 pm - 9:26 am

ORD

SJC

15h 27m

1 stop

$292Alaska Airlines

Tue, Jun 16 - Tue, Jun 23

2:12 pm - 5:28 am

SJC

ORD

13h 16m

1 stop

7:59 pm - 9:26 am

ORD

SJC

15h 27m

1 stop

$299Multiple Airlines

Sat, Jul 11 - Tue, Jul 14

6:37 pm - 5:00 am

SJC

ORD

8h 23m

1 stop

7:00 am - 1:44 pm

ORD

SJC

8h 44m

1 stop

$301Alaska Airlines

Tue, Aug 18 - Wed, Aug 19

2:23 pm - 11:55 pm

SFO

ORD

7h 32m

1 stop

6:55 am - 7:55 pm

ORD

SFO

15h 00m

1 stop

$302Multiple Airlines

Mon, Jun 8 - Tue, Jun 16

8:24 pm - 5:00 am

SFO

ORD

6h 36m

1 stop

9:00 pm - 11:58 pm

ORD

SFO

4h 58mnonstop

$305American Airlines

Mon, Jun 8 - Tue, Jun 16

Frontier flights from California to Illinois

Our best Frontier deals on California to Illinois flight tickets

Frontier

May 26

LAX12:26 amLos Angeles

4h 08m

ORD6:34 amChicago O'Hare Intl

May 29

ORD8:46 pmChicago O'Hare Intl

4h 40m

LAX11:26 pmLos Angeles

$199

Frontier

Jul 19

LAX9:44 amLos Angeles

13h 05m

1 stop

ORD12:49 amChicago O'Hare Intl

Jul 22

ORD9:13 pmChicago O'Hare Intl

4h 44m

LAX11:57 pmLos Angeles

$200

Frontier

Aug 18

LAX9:43 amLos Angeles

9h 10m

1 stop

ORD8:53 pmChicago O'Hare Intl

Aug 22

ORD9:07 pmChicago O'Hare Intl

4h 36m

LAX11:43 pmLos Angeles

$201

Delta flights from California to Illinois

Our best Delta deals on California to Illinois flight tickets

Delta

Aug 12

LAX11:29 amLos Angeles

4h 11m

ORD5:40 pmChicago O'Hare Intl

Aug 19

ORD2:36 pmChicago O'Hare Intl

4h 32m

LAX5:08 pmLos Angeles

$199

Delta

Jun 9

LAX2:00 pmLos Angeles

7h 39m

1 stop

ORD11:39 pmChicago O'Hare Intl

Jun 23

ORD2:45 pmChicago O'Hare Intl

4h 30m

LAX5:15 pmLos Angeles

$209

Delta

Jul 21

LAX6:15 amLos Angeles

6h 50m

1 stop

ORD3:05 pmChicago O'Hare Intl

Jul 28

ORD8:52 amChicago O'Hare Intl

7h 43m

1 stop

LAX2:35 pmLos Angeles

$219

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Tue 8/25

11:55 pm-5:55 am

Nonstop4h 00m

Chicago Midway

Tue 9/1

8:50 pm-11:10 pm

Nonstop4h 20m

$199

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Wed 8/12

11:29 am-5:40 pm

Nonstop4h 11m

Chicago O'Hare Intl

Wed 8/19

2:36 pm-5:08 pm

Nonstop4h 32m

$199

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Sun 7/19

9:44 am-12:49 am

1 stop13h 05m

Chicago O'Hare Intl

Wed 7/22

9:13 pm-11:57 pm

Nonstop4h 44m

$200

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Tue 8/18

9:43 am-8:53 pm

1 stop9h 10m

Chicago O'Hare Intl

Sat 8/22

9:07 pm-11:43 pm

Nonstop4h 36m

$201

San DiegoChicago

SAN - ORD

SANORD

San Diego

Sat 6/6

6:15 am-12:28 pm

Nonstop4h 13m

Chicago O'Hare Intl

Tue 6/9

9:17 pm-11:48 pm

Nonstop4h 31m

$247

San JoseChicago

SJC - ORD

SJCORD

San Jose

Tue 6/16

3:15 pm-11:36 pm

1 stop6h 21m

Chicago O'Hare Intl

Tue 6/23

7:59 pm-9:26 am

1 stop15h 27m

$292

San JoseChicago

SJC - ORD

SJCORD

San Jose

Sat 7/11

2:12 pm-5:28 am

1 stop13h 16m

Chicago O'Hare Intl

Tue 7/14

7:59 pm-9:26 am

1 stop15h 27m

$299

San JoseChicago

SJC - ORD

SJCORD

San Jose

Tue 8/18

6:37 pm-5:00 am

1 stop8h 23m

Chicago O'Hare Intl

Wed 8/19

7:00 am-1:44 pm

1 stop8h 44m

$301

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 6/8

2:23 pm-11:55 pm

1 stop7h 32m

Chicago O'Hare Intl

Tue 6/16

6:55 am-7:55 pm

1 stop15h 00m

$302

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 6/8

8:24 pm-5:00 am

1 stop6h 36m

Chicago O'Hare Intl

Tue 6/16

9:00 pm-11:58 pm

Nonstop4h 58m

$305

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from California to Illinois

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 Illinois?

The cheapest month to fly to Illinois from California is in September. Flight prices, which tend to average around $301, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $311.

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

The cheapest day to depart from California to Illinois is on a Thursday when prices can be found for as low as $378. Flights from California to Illinois on a Sunday will generally be more expensive and average around $445. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from California to Illinois during this time can be as low as $305. Flights at noon are often more expensive with an average ticket price of $486.

What is the cheapest California to Illinois flight route?

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

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

You are more likely to see cheaper flights to Illinois from California when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $331 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from California for as low as $275 on momondo.

Can stopping save me money on California to Illinois flights?

You could potentially save up to 20% on your flight if you consider stops on a California to Illinois flight.

Cheap California to Illinois flight deals and tips

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

Best Price Found	$174
Fastest flight time	3h 10m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from California in the past 72 hours is $174. The best round-trip flight deal from California to Illinois found on momondo in the last 72 hours is $339.

The fastest flight from California to Illinois takes 3h 10m

Direct flights go from California to Illinois every day.

There are 98 airports in Illinois. From California there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).

Search flight deals

Frequently asked questions about flying from California to Illinois

When did momondo last update prices for flights from California to Illinois?
Prices for flights from California to Illinois were last updated today.
How many operators does momondo search for flights from California to Illinois?
As of May 2026, there are 9 operators available to choose from for flights from California to Illinois.
How old do you have to be to fly from California to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from California to Illinois?
momondo data reveals that the most frequently booked plane model on the route from California to Illinois is Airbus A321neo, representing 19.29% of all bookings. The subsequent popular models are Boeing 737-800 at 17.29%, Airbus A321-100/200 at 10.47%, and Boeing 737 MAX 8 at 10.12%.

Best airlines flying from California to Illinois

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $51	Free Cancellation	Rating 5.6 2,945 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $97	Free Cancellation	Rating 6.2 8,615 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,837 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $122	Free Cancellation	Rating 7.9 8,452 reviews	Search Delta flights
Alaska Airlines	PriceFrom $152	Free Cancellation	Rating 7.9 12,379 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $157	Free Cancellation	Rating 7.1 11,646 reviews	Search American Airlines flights
JetBlue	PriceFrom $166	Free Cancellation	Rating 7.2 2,982 reviews	Search JetBlue flights
United Airlines	PriceFrom $168	Free Cancellation	Rating 7.4 9,731 reviews	Search United Airlines flights
Southwest	PriceFrom $179	Free Cancellation	Rating 7.9 4,285 reviews	Search Southwest flights

Why use momondo?

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

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

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

Flights from California to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from California to Illinois.

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

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

An easier way to manage your Illinois 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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Wed 6/17

Wed 6/24

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular cities

Other flights from California

Other flights to Illinois

Airlines

Complete your trip

Feeling lucky

Popular cities in Illinois

Flights to New Yorkfrom $88

Flights to Los Angelesfrom $47

Flights to Orlandofrom $58

Flights to Miamifrom $55

Flights to Chicagofrom $62

Flights to San Franciscofrom $54

Flights to Las Vegasfrom $48

Flights to Washington, D.C.from $56

Flights to Bostonfrom $63

Flights to Atlantafrom $54

Flights to Fort Lauderdalefrom $56

Flights to Dallasfrom $96

Cheap flights from California to Illinois from $76

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to Illinois departing on 9/1. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from California to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Frontier flights from California to Illinois

Our best Frontier deals on California to Illinois flight tickets

Delta flights from California to Illinois

Our best Delta deals on California to Illinois flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from California to Illinois that are best for you.

See travel insights to Illinois from

How to get the cheapest flight ticket from California to Illinois

What is the cheapest month to fly to Illinois?

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

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

What is the cheapest California to Illinois flight route?

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

Can stopping save me money on California to Illinois flights?

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

What airlines fly to Illinois?

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

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

How long is the flight from California to Illinois?

Cheap California to Illinois flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from California to Illinois

Best airlines flying from California to Illinois

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

Why use momondo?

An easier way to manage your Illinois 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 Illinois

Popular cities in Illinois

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

California flight routes

According to popular flight searches on momondo this year

Illinois flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Illinois

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Complete your trip to Illinois

Explore popular destinations other users love

According to popular flight searches on momondo this year