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

As of October 2025, 1,619 flights take off from California and land in Illinois each week. The most common flight departure day for this route is Wed, with 18% of weekly flights taking off on this day.

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

Spirit Airlines, Frontier, and American Airlines are the most popular carriers operating from California to Illinois

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 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 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 San Diego (a popular airport in California) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 3h 54m on average. If you fly from Sacramento (another popular airport in California) to Chicago O'Hare Intl Airport, then the average flight time is 4h 03m.

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

As of October 2025, there are 231 flights per day flying from California to Illinois. The most common time of day flights depart is 10:00AM, with 51% 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 October 2025, 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.

$43 Cheap Flights from California to Illinois in 2025/26

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Cheap round-trip flights

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1:30 pm - 5:32 amBUR-ORD

14h 02m1 stop

4:38 pm - 9:33 pmORD-BUR

6h 55m1 stop

$86Spirit Airlines

Find Deal

Wed, Nov 12 - Sat, Nov 15

5:42 pm - 9:48 pmBUR-ORD

26h 06m1 stop

10:43 pm - 12:35 pmORD-BUR

15h 52m1 stop

$128Multiple Airlines

Find Deal

Thu, Nov 13 - Mon, Nov 17

4:17 pm - 12:31 amBUR-ORD

6h 14m1 stop

5:00 am - 8:52 amORD-BUR

5h 52m1 stop

$149American Airlines

Find Deal

Tue, Dec 9 - Fri, Dec 12

5:57 pm - 11:29 pmSAN-ORD

27h 32m1 stop

6:00 am - 11:17 amORD-SAN

7h 17m1 stop

$156Frontier

Find Deal

Fri, Nov 14 - Mon, Nov 17

5:08 pm - 11:15 pmSAN-ORD

4h 07mnonstop

2:35 pm - 7:52 pmORD-SAN

7h 17m1 stop

$158United Airlines

Find Deal

Wed, Dec 10 - Thu, Dec 11

12:32 pm - 11:35 pmBUR-ORD

9h 03m1 stop

5:00 am - 8:52 amORD-BUR

5h 52m1 stop

$159American Airlines

Find Deal

Fri, Dec 12 - Mon, Dec 15

3:47 pm - 11:42 amSAN-ORD

17h 55m1 stop

7:00 am - 11:59 pmORD-SAN

18h 59m1 stop

$162Frontier

Find Deal

Thu, Dec 4 - Sun, Jan 4

5:35 am - 11:40 amLAX-MDW

4h 05mnonstop

8:10 am - 10:45 amMDW-LAX

4h 35mnonstop

$173Southwest

Find Deal

Sat, Dec 6 - Wed, Dec 10

10:51 am - 5:05 pmSAN-ORD

4h 14mnonstop

1:30 pm - 4:02 pmORD-SAN

4h 32mnonstop

$177United Airlines

Find Deal

Thu, Nov 13 - Sun, Nov 16

10:45 am - 4:40 pmLAX-MDW

3h 55mnonstop

8:55 pm - 11:25 pmMDW-LAX

4h 30mnonstop

$179Southwest

Find Deal

Thu, Nov 13 - Mon, Nov 17

American Airlines flights from California to Illinois

Our best American Airlines deals on California to Illinois flight tickets

American Airlines

Dec 9

BUR4:17 pmBurbank Bob Hope

6h 14m

1 stop

ORD12:31 amChicago O'Hare Intl

Dec 12

ORD5:00 amChicago O'Hare Intl

5h 52m

1 stop

BUR8:52 amBurbank Bob Hope

$149

Find similar

American Airlines

Dec 12

BUR12:32 pmBurbank Bob Hope

9h 03m

1 stop

ORD11:35 pmChicago O'Hare Intl

Dec 15

ORD5:00 amChicago O'Hare Intl

5h 52m

1 stop

BUR8:52 amBurbank Bob Hope

$159

Find similar

American Airlines

Dec 6

ONT12:46 pmOntario

7h 32m

1 stop

ORD10:18 pmChicago O'Hare Intl

Dec 13

ORD11:30 amChicago O'Hare Intl

6h 32m

1 stop

ONT4:02 pmOntario

$200

Find similar

Alaska Airlines flights from California to Illinois

Our best Alaska Airlines deals on California to Illinois flight tickets

Alaska Airlines

Nov 24

SAN5:31 pmSan Diego

4h 01m

ORD11:32 pmChicago O'Hare Intl

Dec 3

ORD8:59 pmChicago O'Hare Intl

4h 28m

SAN11:27 pmSan Diego

$153

Find similar

Alaska Airlines

Dec 3

SAN2:15 pmSan Diego

14h 06m

1 stop

ORD6:21 amChicago O'Hare Intl

Dec 7

ORD8:59 pmChicago O'Hare Intl

4h 28m

SAN11:27 pmSan Diego

$154

Find similar

Alaska Airlines

Dec 23

SAN5:31 pmSan Diego

4h 28m

ORD11:59 pmChicago O'Hare Intl

Jan 20

ORD3:25 pmChicago O'Hare Intl

4h 42m

SAN6:07 pmSan Diego

$155

Find similar

Fly from

Fly to

Route

Depart

Return

Price

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Wed 11/12

1:30 pm-5:32 am

1 stop14h 02m

Chicago O'Hare Intl

Sat 11/15

4:38 pm-9:33 pm

1 stop6h 55m

$86

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Thu 11/13

5:42 pm-9:48 pm

1 stop26h 06m

Chicago O'Hare Intl

Mon 11/17

10:43 pm-12:35 pm

1 stop15h 52m

$128

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Tue 12/9

4:17 pm-12:31 am

1 stop6h 14m

Chicago O'Hare Intl

Fri 12/12

5:00 am-8:52 am

1 stop5h 52m

$149

San DiegoChicago

SAN - ORD

SANORD

San Diego

Fri 11/14

5:57 pm-11:29 pm

1 stop27h 32m

Chicago O'Hare Intl

Mon 11/17

6:00 am-11:17 am

1 stop7h 17m

$156

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 12/10

5:08 pm-11:15 pm

Nonstop4h 07m

Chicago O'Hare Intl

Thu 12/11

2:35 pm-7:52 pm

1 stop7h 17m

$158

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Fri 12/12

12:32 pm-11:35 pm

1 stop9h 03m

Chicago O'Hare Intl

Mon 12/15

5:00 am-8:52 am

1 stop5h 52m

$159

San DiegoChicago

SAN - ORD

SANORD

San Diego

Thu 12/4

3:47 pm-11:42 am

1 stop17h 55m

Chicago O'Hare Intl

Sun 1/4

7:00 am-11:59 pm

1 stop18h 59m

$162

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Sat 12/6

5:35 am-11:40 am

Nonstop4h 05m

Chicago Midway

Wed 12/10

8:10 am-10:45 am

Nonstop4h 35m

$173

San DiegoChicago

SAN - ORD

SANORD

San Diego

Thu 11/13

10:51 am-5:05 pm

Nonstop4h 14m

Chicago O'Hare Intl

Sun 11/16

1:30 pm-4:02 pm

Nonstop4h 32m

$177

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Thu 11/13

10:45 am-4:40 pm

Nonstop3h 55m

Chicago Midway

Mon 11/17

8:55 pm-11:25 pm

Nonstop4h 30m

$179

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 $242, 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 February is also cheap. Prices for this month can be found on momondo for an average of $248.

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 $359. Flights from California to Illinois on a Sunday will generally be more expensive and average around $451. 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 $280. Flights at noon are often more expensive with an average ticket price of $456.

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 $299 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 $255 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 8% 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	$137
Fastest flight time	3h 50m
Direct flights	Every day
Airports in Illinois	2 airports

The best one-way flight to Illinois from California in the past 72 hours is $137. 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 50m

Direct flights go from California to Illinois every day.

There are 2 airports near Illinois: 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 October 2025, 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 Boeing 737-800, representing 18.43% of all bookings. The subsequent popular models are Airbus A321neo at 15.78%, Boeing 757-300 at 9.14%, and Boeing 737 MAX 8 at 8.64%.

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 $96	Free Cancellation	Rating 5.8 3,130 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $104	Free Cancellation	Rating 6.3 8,097 reviews	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,788 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $128	Free Cancellation	Rating 7.9 7,979 reviews	Search Delta flights
Sun Country Air	PriceFrom $130	Free Cancellation	Rating 6.9 334 reviews	Search Sun Country Air flights
United Airlines	PriceFrom $133	Free Cancellation	Rating 7.4 8,988 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $147	Free Cancellation	Rating 8.0 11,150 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $169	Free Cancellation	Rating 7.2 11,028 reviews	Search American Airlines flights
Southwest	PriceFrom $179	Free Cancellation	Rating 8.0 4,237 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.

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Fri 11/21

Fri 11/28

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Find better results for your trip to Illinois

Popular cities in Illinois

Flights to New Yorkfrom $49

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Flights to Orlandofrom $54

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Flights to San Franciscofrom $48

Flights to Washington, D.C.from $49

Flights to Bostonfrom $58

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Flights to Dallasfrom $49

Flights to Seattlefrom $58

Cheap flights from California to Illinois from $43

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 11/12. 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

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Find the cheapest flights from California to Illinois

Cheap round-trip flights

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American Airlines flights from California to Illinois

Our best American Airlines deals on California to Illinois flight tickets

Alaska Airlines flights from California to Illinois

Our best Alaska 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.

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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

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?

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 $280. Flights at noon are often more expensive with an average ticket price of $456.

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?

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 8% on your flight if you consider stops on a California to Illinois flight.

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

Spirit Airlines, Frontier, and American Airlines are the most popular carriers operating from California to Illinois

What airlines fly to Illinois?

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

As of October 2025, there are 231 flights per day flying from California to Illinois. The most common time of day flights depart is 10:00AM, with 51% of flights taking off at noon.

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

As of October 2025, 1,619 flights take off from California and land in Illinois each week. The most common flight departure day for this route is Wed, with 18% of weekly flights taking off on this day.

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

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

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

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

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

What is the most popular plane model 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?

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