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Cheap flights from California to Illinois from $66

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 2/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from California to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
12:37 pm - 7:02 pm
SAN
-
ORD
4h 25mnonstop
Alaska Airlines Logo
3:52 pm - 6:31 pm
ORD
-
SAN
4h 39mnonstop
$157Alaska Airlines
sáb., abr. 18 - sáb., abr. 25
Frontier Logo
9:45 am - 10:26 am
SAN
-
ORD
22h 41m
1 stop
Frontier Logo
7:55 am - 7:53 pm
ORD
-
SAN
13h 58m
1 stop
$158Frontier
mié., feb. 25 - sáb., feb. 28
American Airlines Logo
10:35 pm - 4:39 am
SAN
-
ORD
4h 04mnonstop
American Airlines Logo
5:49 pm - 8:20 pm
ORD
-
SAN
4h 31mnonstop
$159American Airlines
sáb., feb. 28 - sáb., mar. 7
United Airlines Logo
7:50 pm - 5:12 am
SAN
-
ORD
7h 22m
1 stop
United Airlines Logo
8:47 am - 11:38 am
ORD
-
SAN
4h 51mnonstop
$163United Airlines
mié., mar. 4 - mié., mar. 11
American Airlines Logo
10:35 pm - 4:39 am
SAN
-
ORD
4h 04mnonstop
American Airlines Logo
8:06 pm - 10:40 pm
ORD
-
SAN
4h 34mnonstop
$166American Airlines
sáb., mar. 21 - mié., mar. 25
Spirit Airlines Logo
4:07 pm - 5:31 am
LAX
-
ORD
11h 24m
1 stop
Spirit Airlines Logo
8:53 pm - 8:15 am
ORD
-
LAX
13h 22m
1 stop
$180Spirit Airlines
mié., abr. 22 - sáb., abr. 25
Spirit Airlines Logo
12:51 am - 6:46 am
LAX
-
ORD
3h 55mnonstop
Spirit Airlines Logo
8:53 pm - 8:15 am
ORD
-
LAX
13h 22m
1 stop
$184Spirit Airlines
jue., abr. 16 - dom., abr. 19
Southwest Logo
2:25 pm - 12:05 am
SFO
-
MDW
7h 40m
1 stop
Southwest Logo
9:40 pm - 12:20 am
MDW
-
SFO
4h 40mnonstop
$247Southwest
mar., mar. 31 - sáb., abr. 4
United Airlines Logo
11:59 pm - 6:19 am
SFO
-
ORD
4h 20mnonstop
United Airlines Logo
6:17 pm - 9:20 pm
ORD
-
SFO
5h 03mnonstop
$250United Airlines
vie., feb. 20 - mar., feb. 24
Southwest Logo
6:25 am - 12:25 pm
SFO
-
MDW
4h 00mnonstop
Southwest Logo
7:55 am - 10:55 am
MDW
-
SFO
5h 00mnonstop
$250Southwest
mar., feb. 17 - dom., feb. 22

American Airlines flights from California to Illinois

Our best American Airlines deals on California to Illinois flight tickets
American Airlines
Mar 3
SAN6:20 amSan Diego
4h 19m
ORD12:39 pmChicago O'Hare Intl
Mar 10
ORD5:49 pmChicago O'Hare Intl
4h 31m
SAN8:20 pmSan Diego
$159
American Airlines
Mar 13
SAN3:19 pmSan Diego
4h 17m
ORD9:36 pmChicago O'Hare Intl
Mar 16
ORD8:06 pmChicago O'Hare Intl
4h 34m
SAN10:40 pmSan Diego
$179
American Airlines
Apr 9
SAN3:07 pmSan Diego
4h 21m
ORD9:28 pmChicago O'Hare Intl
Apr 13
ORD8:45 pmChicago O'Hare Intl
4h 31m
SAN11:16 pmSan Diego
$188

Alaska Airlines flights from California to Illinois

Our best Alaska Airlines deals on California to Illinois flight tickets
Alaska Airlines
Feb 18
SAN5:42 pmSan Diego
4h 17m
ORD11:59 pmChicago O'Hare Intl
Feb 22
ORD8:20 amChicago O'Hare Intl
4h 49m
SAN11:09 amSan Diego
$167
Alaska Airlines
Feb 26
SAN5:42 pmSan Diego
4h 17m
ORD11:59 pmChicago O'Hare Intl
Mar 5
ORD3:07 pmChicago O'Hare Intl
4h 45m
SAN5:52 pmSan Diego
$177
Alaska Airlines
Feb 14
SAN8:35 amSan Diego
4h 23m
ORD2:58 pmChicago O'Hare Intl
Feb 17
ORD3:07 pmChicago O'Hare Intl
4h 45m
SAN5:52 pmSan Diego
$194

momondo Fare Finder

 
Customize your flight search to find flights from California to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated enero 29, 2026.
Use the filters below to find and compare flights from California to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San DiegoChicago

SAN - ORD

SANORD

San Diego

sáb. 4/18

12:37 pm-7:02 pm

Nonstop4h 25m

Chicago O'Hare Intl

sáb. 4/25

3:52 pm-6:31 pm

Nonstop4h 39m

$157

San DiegoChicago

SAN - ORD

SANORD

San Diego

mié. 2/25

9:45 am-10:26 am

1 stop22h 41m

Chicago O'Hare Intl

sáb. 2/28

7:55 am-7:53 pm

1 stop13h 58m

$158

San DiegoChicago

SAN - ORD

SANORD

San Diego

sáb. 2/28

10:35 pm-4:39 am

Nonstop4h 04m

Chicago O'Hare Intl

sáb. 3/7

5:49 pm-8:20 pm

Nonstop4h 31m

$159

San DiegoChicago

SAN - ORD

SANORD

San Diego

mié. 3/4

7:50 pm-5:12 am

1 stop7h 22m

Chicago O'Hare Intl

mié. 3/11

8:47 am-11:38 am

Nonstop4h 51m

$163

San DiegoChicago

SAN - ORD

SANORD

San Diego

sáb. 3/21

10:35 pm-4:39 am

Nonstop4h 04m

Chicago O'Hare Intl

mié. 3/25

8:06 pm-10:40 pm

Nonstop4h 34m

$166

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

mié. 4/22

4:07 pm-5:31 am

1 stop11h 24m

Chicago O'Hare Intl

sáb. 4/25

8:53 pm-8:15 am

1 stop13h 22m

$180

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

jue. 4/16

12:51 am-6:46 am

Nonstop3h 55m

Chicago O'Hare Intl

dom. 4/19

8:53 pm-8:15 am

1 stop13h 22m

$184

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

mar. 3/31

2:25 pm-12:05 am

1 stop7h 40m

Chicago Midway

sáb. 4/4

9:40 pm-12:20 am

Nonstop4h 40m

$247

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

vie. 2/20

11:59 pm-6:19 am

Nonstop4h 20m

Chicago O'Hare Intl

mar. 2/24

6:17 pm-9:20 pm

Nonstop5h 03m

$250

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

mar. 2/17

6:25 am-12:25 pm

Nonstop4h 00m

Chicago Midway

dom. 2/22

7:55 am-10:55 am

Nonstop5h 00m

$250

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Illinois from

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?

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 $263.

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 $356. Flights from California to Illinois on a Sunday will generally be more expensive and average around $431. 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 $274. Flights at noon are often more expensive with an average ticket price of $450.

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 $306 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 $241 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 $255.
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 Lambert-St Louis (STL).
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?

  • 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?

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
FrontierPriceFrom $62Free CancellationRating
5.7
3,056 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $77Free CancellationRating
6.3
8,389 reviews
Search Spirit Airlines flights
Hawaiian AirlinesPriceFrom $101Free CancellationRating
7.8
2,830 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $128Free CancellationRating
7.9
8,125 reviews
Search Delta flights
Sun Country AirPriceFrom $130Free CancellationRating
6.9
343 reviews
Search Sun Country Air flights
United AirlinesPriceFrom $133Free CancellationRating
7.4
9,214 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $138Free CancellationRating
8.0
11,805 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $158Free CancellationRating
7.2
11,199 reviews
Search American Airlines flights
JetBluePriceFrom $166Free CancellationRating
7.2
2,891 reviews
Search JetBlue flights
SouthwestPriceFrom $179Free CancellationRating
8.0
4,267 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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sáb. 2/28
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Find better results for your trip to Illinois

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