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.

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

As of February 2026, 577 flights take off from California and land in Illinois each week. The most common flight departure day for this route is Wed, with 39% of weekly flights taking off on this day.

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

As of February 2026, there are 82 flights per day flying from California to Illinois. The most common time of day flights depart is 6:00AM, with 51% of flights taking off at noon.

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

Spirit Airlines, United Airlines, and Frontier 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 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

Fri, Apr 17 - Mon, Apr 20

5:40 pm - 5:31 am

BUR

ORD

9h 51m

1 stop

8:53 pm - 8:13 am

ORD

BUR

13h 20m

1 stop

$129Spirit Airlines

Tue, May 12 - Tue, May 19

3:30 pm - 6:08 am

ONT

ORD

12h 38m

1 stop

8:55 pm - 7:12 am

ORD

ONT

12h 17m

1 stop

$154Frontier

Mon, Mar 23 - Wed, Mar 25

7:17 pm - 5:24 pm

ONT

ORD

20h 07m

1 stop

7:19 pm - 1:11 pm

ORD

ONT

19h 52m

1 stop

$158Frontier

Wed, Feb 25 - Mon, Mar 2

6:20 am - 12:39 pm

SAN

ORD

4h 19mnonstop

8:06 pm - 10:40 pm

ORD

SAN

4h 34mnonstop

$165American Airlines

Tue, Mar 17 - Tue, Mar 17

10:30 pm - 4:35 am

SAN

ORD

4h 05mnonstop

7:00 am - 9:40 am

ORD

SAN

4h 40mnonstop

$167United Airlines

Wed, Apr 22 - Sun, Apr 26

10:55 pm - 9:20 am

SFO

MDW

8h 25m

1 stop

6:05 am - 1:45 pm

MDW

SFO

9h 40m

1 stop

$242Southwest

Wed, Mar 18 - Wed, Mar 25

12:45 am - 7:07 am

SFO

ORD

4h 22mnonstop

9:20 pm - 12:19 am

ORD

SFO

4h 59mnonstop

$243United Airlines

Thu, Apr 9 - Mon, Apr 13

2:25 pm - 12:05 am

SFO

MDW

7h 40m

1 stop

9:05 pm - 11:45 pm

MDW

SFO

4h 40mnonstop

$245Southwest

Tue, Mar 10 - Wed, Mar 18

3:24 pm - 9:36 pm

SNA

ORD

4h 12mnonstop

8:10 am - 10:46 am

ORD

SNA

4h 36mnonstop

$280American Airlines

Wed, Apr 1 - Sat, Apr 4

Frontier flights from California to Illinois

Our best Frontier deals on California to Illinois flight tickets

Frontier

Mar 23

ONT3:30 pmOntario

12h 38m

1 stop

ORD6:08 amChicago O'Hare Intl

Mar 25

ORD8:55 pmChicago O'Hare Intl

12h 17m

1 stop

ONT7:12 amOntario

$154

Frontier

Feb 25

ONT7:17 pmOntario

20h 07m

1 stop

ORD5:24 pmChicago O'Hare Intl

Mar 2

ORD7:19 pmChicago O'Hare Intl

19h 52m

1 stop

ONT1:11 pmOntario

$158

Frontier

Apr 13

SAN8:54 pmSan Diego

7h 53m

1 stop

ORD6:47 amChicago O'Hare Intl

Apr 19

ORD7:43 amChicago O'Hare Intl

8h 42m

1 stop

SAN2:25 pmSan Diego

$161

Hawaiian Airlines flights from California to Illinois

Our best Hawaiian Airlines deals on California to Illinois flight tickets

Hawaiian Airlines

Mar 9

SAN5:42 pmSan Diego

4h 17m

ORD11:59 pmChicago O'Hare Intl

Mar 18

ORD8:20 amChicago O'Hare Intl

4h 42m

SAN11:02 amSan Diego

$164

Hawaiian Airlines

Mar 13

SAN5:42 pmSan Diego

4h 17m

ORD11:59 pmChicago O'Hare Intl

Mar 16

ORD7:40 amChicago O'Hare Intl

4h 49m

SAN10:29 amSan Diego

$189

Fly from

Fly to

Route

Depart

Return

Price

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Fri 4/17

5:40 pm-5:50 am

1 stop10h 10m

Chicago O'Hare Intl

Mon 4/20

8:52 pm-8:08 am

1 stop13h 16m

$128

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Tue 5/12

5:40 pm-5:31 am

1 stop9h 51m

Chicago O'Hare Intl

Tue 5/19

8:53 pm-8:13 am

1 stop13h 20m

$129

OntarioChicago

ONT - ORD

ONTORD

Ontario

Mon 3/23

3:30 pm-6:08 am

1 stop12h 38m

Chicago O'Hare Intl

Wed 3/25

8:55 pm-7:12 am

1 stop12h 17m

$154

OntarioChicago

ONT - ORD

ONTORD

Ontario

Wed 2/25

7:17 pm-5:24 pm

1 stop20h 07m

Chicago O'Hare Intl

Mon 3/2

7:19 pm-1:11 pm

1 stop19h 52m

$158

San DiegoChicago

SAN - ORD

SANORD

San Diego

Tue 3/17

6:20 am-12:39 pm

Nonstop4h 19m

Chicago O'Hare Intl

Tue 3/17

8:06 pm-10:40 pm

Nonstop4h 34m

$165

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 4/22

10:30 pm-4:35 am

Nonstop4h 05m

Chicago O'Hare Intl

Sun 4/26

7:00 am-9:40 am

Nonstop4h 40m

$167

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Wed 3/18

10:55 pm-9:20 am

1 stop8h 25m

Chicago Midway

Wed 3/25

6:05 am-1:45 pm

1 stop9h 40m

$242

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Thu 4/9

12:45 am-7:07 am

Nonstop4h 22m

Chicago O'Hare Intl

Mon 4/13

9:20 pm-12:19 am

Nonstop4h 59m

$243

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Tue 3/10

2:25 pm-12:05 am

1 stop7h 40m

Chicago Midway

Wed 3/18

9:05 pm-11:45 pm

Nonstop4h 40m

$245

Santa AnaChicago

SNA - ORD

SNAORD

Santa Ana J. Wayne/Orange Cnty

Wed 4/1

3:24 pm-9:36 pm

Nonstop4h 12m

Chicago O'Hare Intl

Sat 4/4

8:10 am-10:46 am

Nonstop4h 36m

$280

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 $243, 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 $261.

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 $432. 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 $275. Flights at noon are often more expensive with an average ticket price of $451.

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 $311 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 $220 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 19% 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	$135
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 $135. The best round-trip flight deal from California to Illinois found on momondo in the last 72 hours is $254.

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), Chicago Midway (MDW).

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 20.32% of all bookings. The subsequent popular models are Boeing 737-800 at 18.63%, Boeing 757-300 at 10.74%, and Boeing 737 MAX 8 at 10.70%.

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 3,052 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $77	Free Cancellation	Rating 6.3 8,444 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $101	Free Cancellation	Rating 7.8 2,832 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.9 8,180 reviews	Search Delta flights
Sun Country Air	PriceFrom $130	Free Cancellation	Rating 6.8 342 reviews	Search Sun Country Air flights
United Airlines	PriceFrom $133	Free Cancellation	Rating 7.4 9,274 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $138	Free Cancellation	Rating 8.0 11,874 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $158	Free Cancellation	Rating 7.2 11,266 reviews	Search American Airlines flights
JetBlue	PriceFrom $166	Free Cancellation	Rating 7.2 2,893 reviews	Search JetBlue flights
Southwest	PriceFrom $179	Free Cancellation	Rating 8.0 4,280 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

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Popular cities in Illinois

Flights to New Yorkfrom $52

Flights to Los Angelesfrom $49

Flights to Miamifrom $36

Flights to Chicagofrom $55

Flights to Orlandofrom $52

Flights to San Franciscofrom $51

Flights to Las Vegasfrom $28

Flights to Washington, D.C.from $51

Flights to Bostonfrom $65

Flights to Atlantafrom $49

Flights to Dallasfrom $54

Flights to Seattlefrom $66

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 5/20. 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 California to Illinois

Our best Frontier deals on California to Illinois flight tickets

Hawaiian Airlines flights from California to Illinois

Our best Hawaiian 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?

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

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

How can momondo help me find flights 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?

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

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According to popular flight searches on momondo this year

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