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Cheap flights from California to Illinois from $67

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 2/26. 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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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.
Multiple Airlines Logo
3:11 pm - 9:03 pm
LAS
-
ORD
3h 52mnonstop
Multiple Airlines Logo
8:05 am - 10:46 pm
ORD
-
LAS
16h 41m
1 stop
$132Multiple Airlines
Thu, Feb 12 - Sat, Feb 14
Multiple Airlines Logo
11:39 am - 5:26 pm
LAS
-
ORD
3h 47mnonstop
Multiple Airlines Logo
3:40 pm - 5:11 pm
ORD
-
LAS
27h 31m
2 stops
$133Multiple Airlines
Fri, Feb 20 - Fri, Feb 27
Multiple Airlines Logo
11:39 am - 5:26 pm
LAS
-
ORD
3h 47mnonstop
Multiple Airlines Logo
8:20 am - 4:37 pm
ORD
-
LAS
10h 17m
1 stop
$135Multiple Airlines
Fri, Feb 20 - Sun, Feb 22
American Airlines Logo
6:20 am - 12:39 pm
SAN
-
ORD
4h 19mnonstop
American Airlines Logo
8:00 pm - 10:34 pm
ORD
-
SAN
4h 34mnonstop
$161American Airlines
Wed, Feb 25 - Wed, Feb 25
United Airlines Logo
7:50 pm - 5:12 am
SAN
-
ORD
7h 22m
1 stop
United Airlines Logo
7:05 am - 9:47 am
ORD
-
SAN
4h 42mnonstop
$163United Airlines
Wed, Mar 4 - Tue, Mar 10
United Airlines Logo
10:30 pm - 4:29 am
SAN
-
ORD
3h 59mnonstop
United Airlines Logo
8:47 am - 11:38 am
ORD
-
SAN
4h 51mnonstop
$167United Airlines
Thu, Mar 12 - Tue, Mar 17
American Airlines Logo
3:19 pm - 9:35 pm
SAN
-
ORD
4h 16mnonstop
American Airlines Logo
5:49 pm - 8:20 pm
ORD
-
SAN
4h 31mnonstop
$169American Airlines
Thu, Feb 19 - Sat, Feb 28
Spirit Airlines Logo
12:51 am - 6:46 am
LAX
-
ORD
3h 55mnonstop
Spirit Airlines Logo
6:00 am - 8:34 am
ORD
-
LAX
4h 34mnonstop
$178Spirit Airlines
Wed, Apr 15 - Sun, Apr 19
Southwest Logo
7:40 pm - 4:35 am
SFO
-
MDW
6h 55m
1 stop
Southwest Logo
6:10 pm - 8:45 pm
MDW
-
SFO
4h 35mnonstop
$247Southwest
Tue, Apr 21 - Sat, Apr 25
Southwest Logo
6:05 am - 12:05 pm
SFO
-
MDW
4h 00mnonstop
Southwest Logo
8:15 am - 11:15 am
MDW
-
SFO
5h 00mnonstop
$248Southwest
Thu, Feb 26 - Sat, Feb 28

Frontier flights from California to Illinois

Our best Frontier deals on California to Illinois flight tickets
Frontier
Feb 20
LAS11:39 amLas Vegas Harry Reid Intl
3h 47m
ORD5:26 pmChicago O'Hare Intl
Feb 25
ORD8:10 amChicago O'Hare Intl
13h 36m
2 stops
LAS7:46 pmLas Vegas Harry Reid Intl
$137
Frontier
Mar 9
LAS12:25 amLas Vegas Harry Reid Intl
3h 43m
ORD6:08 amChicago O'Hare Intl
Mar 17
ORD7:00 amChicago O'Hare Intl
12h 45m
1 stop
LAS5:45 pmLas Vegas Harry Reid Intl
$138
Frontier
Feb 19
LAS3:11 pmLas Vegas Harry Reid Intl
3h 52m
ORD9:03 pmChicago O'Hare Intl
Feb 23
ORD7:19 pmChicago O'Hare Intl
4h 23m
LAS9:42 pmLas Vegas Harry Reid Intl
$139

United Airlines flights from California to Illinois

Our best United Airlines deals on California to Illinois flight tickets
United Airlines
Mar 4
SAN7:50 pmSan Diego
7h 22m
1 stop
ORD5:12 amChicago O'Hare Intl
Mar 10
ORD7:05 amChicago O'Hare Intl
4h 42m
SAN9:47 amSan Diego
$163
United Airlines
Mar 12
SAN10:30 pmSan Diego
3h 59m
ORD4:29 amChicago O'Hare Intl
Mar 17
ORD8:47 amChicago O'Hare Intl
4h 51m
SAN11:38 amSan Diego
$167
United Airlines
Feb 18
LAS11:59 pmLas Vegas Harry Reid Intl
3h 32m
ORD5:31 amChicago O'Hare Intl
Feb 23
ORD6:00 amChicago O'Hare Intl
4h 13m
LAS8:13 amLas Vegas Harry Reid Intl
$169

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 January 25, 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

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 2/12

3:11 pm-9:03 pm

Nonstop3h 52m

Chicago O'Hare Intl

Sat 2/14

8:05 am-10:46 pm

1 stop16h 41m

$132

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 2/20

11:39 am-5:26 pm

Nonstop3h 47m

Chicago O'Hare Intl

Fri 2/27

3:40 pm-5:11 pm

2 stops27h 31m

$133

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 2/20

11:39 am-5:26 pm

Nonstop3h 47m

Chicago O'Hare Intl

Sun 2/22

8:20 am-4:37 pm

1 stop10h 17m

$135

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 2/25

6:20 am-12:39 pm

Nonstop4h 19m

Chicago O'Hare Intl

Wed 2/25

8:00 pm-10:34 pm

Nonstop4h 34m

$161

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 3/4

7:50 pm-5:12 am

1 stop7h 22m

Chicago O'Hare Intl

Tue 3/10

7:05 am-9:47 am

Nonstop4h 42m

$163

San DiegoChicago

SAN - ORD

SANORD

San Diego

Thu 3/12

10:30 pm-4:29 am

Nonstop3h 59m

Chicago O'Hare Intl

Tue 3/17

8:47 am-11:38 am

Nonstop4h 51m

$167

San DiegoChicago

SAN - ORD

SANORD

San Diego

Thu 2/19

3:19 pm-9:35 pm

Nonstop4h 16m

Chicago O'Hare Intl

Sat 2/28

5:49 pm-8:20 pm

Nonstop4h 31m

$169

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Wed 4/15

12:51 am-6:46 am

Nonstop3h 55m

Chicago O'Hare Intl

Sun 4/19

6:00 am-8:34 am

Nonstop4h 34m

$178

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Tue 4/21

7:40 pm-4:35 am

1 stop6h 55m

Chicago Midway

Sat 4/25

6:10 pm-8:45 pm

Nonstop4h 35m

$247

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Thu 2/26

6:05 am-12:05 pm

Nonstop4h 00m

Chicago Midway

Sat 2/28

8:15 am-11:15 am

Nonstop5h 00m

$248

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 $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 $274. 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 $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 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?

  • 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
3,059 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $77Free CancellationRating
6.3
8,375 reviews
Search Spirit Airlines flights
Hawaiian AirlinesPriceFrom $101Free CancellationRating
7.8
2,829 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $128Free CancellationRating
7.9
8,110 reviews
Search Delta flights
Sun Country AirPriceFrom $130Free CancellationRating
6.9
343 reviews
Search Sun Country Air flights
United AirlinesPriceFrom $133Free CancellationRating
7.4
9,200 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $138Free CancellationRating
8.0
11,786 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $158Free CancellationRating
7.2
11,195 reviews
Search American Airlines flights
JetBluePriceFrom $166Free CancellationRating
7.2
2,895 reviews
Search JetBlue flights
SouthwestPriceFrom $179Free CancellationRating
8.0
4,269 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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