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

As of February 2026, 1,671 flights take off from California and land in Illinois each week. The most common flight departure day for this route is Thu, with 17% of weekly flights taking off on this day.

What airlines fly to Illinois?

American Airlines, United Airlines and Spirit Airlines 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 45% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 10 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

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 48m on average. If you fly from San Diego (another popular airport in California) to Chicago O'Hare Intl Airport, then the average flight time is 3h 59m.

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

Frontier, United Airlines, and Alaska Airlines are the most popular carriers operating from California to Illinois

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

As of February 2026, there are 238 flights per day flying from California to Illinois. The most common time of day flights depart is 10:00AM, with 52% of flights taking off at noon.

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 February 2026, there are 10 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.

$57 Cheap Flights from California to Illinois in 2026

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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.

5:40 pm - 5:50 am

BUR

ORD

10h 10m

1 stop

8:52 pm - 8:08 am

ORD

BUR

13h 16m

1 stop

$128Spirit Airlines

Wed, Apr 22 - Mon, Apr 27

12:20 am - 6:08 am

LAS

ORD

3h 48mnonstop

7:55 am - 12:50 pm

ORD

LAS

6h 55m

1 stop

$130Multiple Airlines

Fri, Apr 17 - Sun, Apr 19

7:00 am - 4:04 pm

LAS

ORD

7h 04m

1 stop

9:14 pm - 10:28 am

ORD

LAS

15h 14m

1 stop

$131Spirit Airlines

Wed, Apr 15 - Sat, Apr 18

2:07 pm - 7:00 am

LAS

ORD

14h 53m

1 stop

9:14 pm - 10:28 am

ORD

LAS

15h 14m

1 stop

$132Spirit Airlines

Sat, Apr 18 - Sat, Apr 25

9:21 pm - 12:38 am

LAS

ORD

25h 17m

1 stop

7:35 am - 12:33 pm

ORD

LAS

6h 58m

1 stop

$134Frontier

Fri, Apr 10 - Mon, Apr 20

3:52 pm - 5:50 am

LAS

ORD

11h 58m

1 stop

8:58 pm - 11:25 pm

ORD

LAS

4h 27mnonstop

$136Frontier

Fri, Apr 24 - Mon, Apr 27

3:09 pm - 9:32 pm

SAN

ORD

4h 23mnonstop

9:00 pm - 11:33 pm

ORD

SAN

4h 33mnonstop

$168American Airlines

Wed, Apr 22 - Sun, Apr 26

5:15 am - 11:15 am

LAX

MDW

4h 00mnonstop

6:45 am - 9:10 am

MDW

LAX

4h 25mnonstop

$189Southwest

Wed, Apr 22 - Sat, Apr 25

5:15 am - 11:15 am

LAX

MDW

4h 00mnonstop

8:55 pm - 11:20 pm

MDW

LAX

4h 25mnonstop

$199Southwest

Wed, Apr 8 - Wed, Apr 15

7:00 pm - 1:28 am

SFO

ORD

4h 28mnonstop

10:45 pm - 1:35 am

ORD

SFO

4h 50mnonstop

$231United Airlines

Mon, Apr 6 - Thu, Apr 9

Alaska Airlines flights from California to Illinois

Our best Alaska Airlines deals on California to Illinois flight tickets

Alaska Airlines

Apr 18

SAN12:37 pmSan Diego

4h 25m

ORD7:02 pmChicago O'Hare Intl

Apr 21

ORD8:20 amChicago O'Hare Intl

4h 42m

SAN11:02 amSan Diego

$166

Alaska Airlines

Mar 17

SAN5:42 pmSan Diego

4h 17m

ORD11:59 pmChicago O'Hare Intl

Apr 1

ORD4:13 pmChicago O'Hare Intl

4h 45m

SAN6:58 pmSan Diego

$167

Alaska Airlines

Mar 16

SAN5:42 pmSan Diego

4h 17m

ORD11:59 pmChicago O'Hare Intl

Mar 23

ORD7:59 pmChicago O'Hare Intl

4h 42m

SAN10:41 pmSan Diego

$197

Spirit Airlines flights from California to Illinois

Our best Spirit Airlines deals on California to Illinois flight tickets

Spirit Airlines

Apr 22

BUR5:40 pmBurbank Bob Hope

10h 10m

1 stop

ORD5:50 amChicago O'Hare Intl

Apr 27

ORD8:52 pmChicago O'Hare Intl

13h 16m

1 stop

BUR8:08 amBurbank Bob Hope

$128

Spirit Airlines

Apr 15

LAS7:00 amLas Vegas Harry Reid Intl

7h 04m

1 stop

ORD4:04 pmChicago O'Hare Intl

Apr 18

ORD9:14 pmChicago O'Hare Intl

15h 14m

1 stop

LAS10:28 amLas Vegas Harry Reid Intl

$131

Spirit Airlines

Apr 18

LAS2:07 pmLas Vegas Harry Reid Intl

14h 53m

1 stop

ORD7:00 amChicago O'Hare Intl

Apr 25

ORD9:14 pmChicago O'Hare Intl

15h 14m

1 stop

LAS10:28 amLas Vegas Harry Reid Intl

$132

Fly from

Fly to

Route

Depart

Return

Price

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Wed 4/22

5:40 pm-5:50 am

1 stop10h 10m

Chicago O'Hare Intl

Mon 4/27

8:52 pm-8:08 am

1 stop13h 16m

$128

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 4/17

12:20 am-6:08 am

Nonstop3h 48m

Chicago O'Hare Intl

Sun 4/19

7:55 am-12:50 pm

1 stop6h 55m

$130

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 4/15

7:00 am-4:04 pm

1 stop7h 04m

Chicago O'Hare Intl

Sat 4/18

9:14 pm-10:28 am

1 stop15h 14m

$131

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sat 4/18

2:07 pm-7:00 am

1 stop14h 53m

Chicago O'Hare Intl

Sat 4/25

9:14 pm-10:28 am

1 stop15h 14m

$132

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 4/10

9:21 pm-12:38 am

1 stop25h 17m

Chicago O'Hare Intl

Mon 4/20

7:35 am-12:33 pm

1 stop6h 58m

$134

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 4/24

3:52 pm-5:50 am

1 stop11h 58m

Chicago O'Hare Intl

Mon 4/27

8:58 pm-11:25 pm

Nonstop4h 27m

$136

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 4/22

3:09 pm-9:32 pm

Nonstop4h 23m

Chicago O'Hare Intl

Sun 4/26

9:00 pm-11:33 pm

Nonstop4h 33m

$168

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Wed 4/22

5:15 am-11:15 am

Nonstop4h 00m

Chicago Midway

Sat 4/25

6:45 am-9:10 am

Nonstop4h 25m

$189

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Wed 4/8

5:15 am-11:15 am

Nonstop4h 00m

Chicago Midway

Wed 4/15

8:55 pm-11:20 pm

Nonstop4h 25m

$199

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Mon 4/6

7:00 pm-1:28 am

Nonstop4h 28m

Chicago O'Hare Intl

Thu 4/9

10:45 pm-1:35 am

Nonstop4h 50m

$231

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 $244, 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 $260.

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 $357. Flights from California to Illinois on a Sunday will generally be more expensive and average around $433. 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 $276. Flights at noon are often more expensive with an average ticket price of $452.

What is the cheapest California to Illinois flight route?

Fly from Los Angeles to Chicago Greater Rockford for the best California - Illinois flight prices

How far in advance should I book a flight 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 $312 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 $259 on momondo.

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

There are 4 cabin classes available to choose from on California to Illinois 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 California to Illinois flights?

You could potentially save up to 2% 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	$147
Fastest flight time	3h 05m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from California in the past 72 hours is $147. The best round-trip flight deal from California to Illinois found on momondo in the last 72 hours is $279.

The fastest flight from California to Illinois takes 3h 05m

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).

Search flight deals

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 February 2026, there are 10 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 21.25% of all bookings. The subsequent popular models are Boeing 737-800 at 18.44%, Boeing 737 MAX 8 at 10.59%, and Boeing 757-300 at 10.59%.

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 $62	Free Cancellation	Rating 5.7 3,040 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $98	Free Cancellation	Rating 6.3 8,493 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $101	Free Cancellation	Rating 7.8 2,836 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.9 8,237 reviews	Search Delta flights
Sun Country Air	PriceFrom $130	Free Cancellation	Rating 6.8 340 reviews	Search Sun Country Air flights
United Airlines	PriceFrom $133	Free Cancellation	Rating 7.4 9,348 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $139	Free Cancellation	Rating 8.0 11,959 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $158	Free Cancellation	Rating 7.2 11,353 reviews	Search American Airlines flights
JetBlue	PriceFrom $166	Free Cancellation	Rating 7.2 2,896 reviews	Search JetBlue flights
Southwest	PriceFrom $179	Free Cancellation	Rating 8.0 4,299 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.

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Popular cities in Illinois

Flights to New Yorkfrom $56

Flights to Los Angelesfrom $52

Flights to Miamifrom $36

Flights to Orlandofrom $56

Flights to Chicagofrom $53

Flights to San Franciscofrom $56

Flights to Las Vegasfrom $30

Flights to Washington, D.C.from $56

Flights to Bostonfrom $75

Flights to Atlantafrom $49

Flights to Dallasfrom $54

Flights to Seattlefrom $48

Cheap flights from California to Illinois from $57

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 5/6. 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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Find the cheapest flights from California to Illinois

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Alaska Airlines flights from California to Illinois

Our best Alaska Airlines deals on California to Illinois flight tickets

Spirit Airlines flights from California to Illinois

Our best Spirit Airlines deals on California to Illinois flight tickets

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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 to Illinois?

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

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

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

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