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Cheap flights from California to Illinois from $54

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 2/27. 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.
Frontier Logo
3:42 pm - 9:32 pm
LAS
-
ORD
3h 50mnonstop
Frontier Logo
5:50 am - 9:32 pm
ORD
-
LAS
17h 42m1 stop
$92Frontier
Thu, Jan 8 - Sun, Jan 11
Frontier Logo
6:40 am - 6:58 pm
LAS
-
ORD
10h 18m1 stop
Frontier Logo
8:49 pm - 11:03 pm
ORD
-
LAS
4h 14mnonstop
$95Frontier
Fri, Jan 9 - Sun, Jan 11
American Airlines Logo
8:00 am - 1:43 pm
LAS
-
ORD
3h 43mnonstop
American Airlines Logo
7:38 pm - 9:46 pm
ORD
-
LAS
4h 08mnonstop
$96American Airlines
Wed, Jan 7 - Mon, Jan 12
United Airlines Logo
12:30 am - 6:08 am
LAS
-
ORD
3h 38mnonstop
United Airlines Logo
4:07 pm - 6:17 pm
ORD
-
LAS
4h 10mnonstop
$101United Airlines
Fri, Jan 16 - Sat, Jan 17
American Airlines Logo
1:00 pm - 12:23 am
LAX
-
ORD
9h 23m1 stop
American Airlines Logo
9:02 am - 11:40 am
ORD
-
LAX
4h 38mnonstop
$139American Airlines
Tue, Feb 3 - Wed, Feb 4
Spirit Airlines Logo
11:59 pm - 6:05 am
LAX
-
ORD
4h 06mnonstop
Spirit Airlines Logo
7:57 pm - 8:22 am
ORD
-
LAX
14h 25m1 stop
$145Spirit Airlines
Wed, Dec 31 - Wed, Jan 7
Southwest Logo
7:10 am - 3:25 pm
SAN
-
ORD
6h 15m1 stop
Southwest Logo
1:45 pm - 11:05 pm
ORD
-
SAN
11h 20m1 stop
$162Southwest
Wed, Feb 18 - Wed, Feb 25
Spirit Airlines Logo
6:45 am - 2:17 pm
SNA
-
ORD
29h 32m3 stops
Spirit Airlines Logo
5:32 pm - 8:57 pm
ORD
-
SNA
29h 25m3 stops
$270Spirit Airlines
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
7:00 am - 1:13 pm
SMF
-
ORD
4h 13mnonstop
United Airlines Logo
9:04 am - 11:55 am
ORD
-
SMF
4h 51mnonstop
$272United Airlines
Sat, Jan 10 - Sat, Jan 17
Southwest Logo
5:45 am - 11:45 am
SFO
-
MDW
4h 00mnonstop
Southwest Logo
8:10 am - 2:55 pm
MDW
-
SFO
8h 45m2 stops
$276Southwest
Sat, Dec 27 - Tue, Jan 6

Frontier flights from California to Illinois

Our best Frontier deals on California to Illinois flight tickets
Frontier
Jan 8
LAS3:42 pmLas Vegas Harry Reid Intl
3h 50m
ORD9:32 pmChicago O'Hare Intl
Jan 11
ORD5:50 amChicago O'Hare Intl
17h 42m
1 stop
LAS9:32 pmLas Vegas Harry Reid Intl
$92
Find similar
Frontier
Jan 9
LAS6:40 amLas Vegas Harry Reid Intl
10h 18m
1 stop
ORD6:58 pmChicago O'Hare Intl
Jan 11
ORD8:49 pmChicago O'Hare Intl
4h 14m
LAS11:03 pmLas Vegas Harry Reid Intl
$95
Find similar
Frontier
Jan 9
LAS6:40 amLas Vegas Harry Reid Intl
10h 18m
1 stop
ORD6:58 pmChicago O'Hare Intl
Jan 18
ORD10:41 pmChicago O'Hare Intl
4h 18m
LAS12:59 amLas Vegas Harry Reid Intl
$97
Find similar

United Airlines flights from California to Illinois

Our best United Airlines deals on California to Illinois flight tickets
United Airlines
Jan 16
LAS12:30 amLas Vegas Harry Reid Intl
3h 38m
ORD6:08 amChicago O'Hare Intl
Jan 17
ORD4:07 pmChicago O'Hare Intl
4h 10m
LAS6:17 pmLas Vegas Harry Reid Intl
$101
Find similar
United Airlines
Jan 16
LAS11:30 pmLas Vegas Harry Reid Intl
3h 36m
ORD5:06 amChicago O'Hare Intl
Jan 18
ORD7:35 amChicago O'Hare Intl
4h 14m
LAS9:49 amLas Vegas Harry Reid Intl
$140
Find similar
United Airlines
Jan 7
LAS11:01 amLas Vegas Harry Reid Intl
3h 46m
ORD4:47 pmChicago O'Hare Intl
Jan 15
ORD9:05 pmChicago O'Hare Intl
4h 14m
LAS11:19 pmLas Vegas Harry Reid Intl
$151
Find similar

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 December 5, 2025.
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 1/8

3:42 pm-9:32 pm

Nonstop3h 50m

Chicago O'Hare Intl

Sun 1/11

5:50 am-9:32 pm

1 stop17h 42m

$92

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 1/9

6:40 am-6:58 pm

1 stop10h 18m

Chicago O'Hare Intl

Sun 1/11

8:49 pm-11:03 pm

Nonstop4h 14m

$95

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 1/7

8:00 am-1:43 pm

Nonstop3h 43m

Chicago O'Hare Intl

Mon 1/12

7:38 pm-9:46 pm

Nonstop4h 08m

$96

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 1/16

12:30 am-6:08 am

Nonstop3h 38m

Chicago O'Hare Intl

Sat 1/17

4:07 pm-6:17 pm

Nonstop4h 10m

$101

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Tue 2/3

1:00 pm-12:23 am

1 stop9h 23m

Chicago O'Hare Intl

Wed 2/4

9:02 am-11:40 am

Nonstop4h 38m

$139

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Wed 12/31

11:59 pm-6:05 am

Nonstop4h 06m

Chicago O'Hare Intl

Wed 1/7

7:57 pm-8:22 am

1 stop14h 25m

$145

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 2/18

7:10 am-3:25 pm

1 stop6h 15m

Chicago O'Hare Intl

Wed 2/25

1:45 pm-11:05 pm

1 stop11h 20m

$162

Santa AnaChicago

SNA - ORD

SNAORD

Santa Ana J. Wayne/Orange Cnty

Thu 1/8

6:45 am-2:17 pm

3 stops29h 32m

Chicago O'Hare Intl

Mon 1/12

5:32 pm-8:57 pm

3 stops29h 25m

$270

SacramentoChicago

SMF - ORD

SMFORD

Sacramento Intl

Sat 1/10

7:00 am-1:13 pm

Nonstop4h 13m

Chicago O'Hare Intl

Sat 1/17

9:04 am-11:55 am

Nonstop4h 51m

$272

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Sat 12/27

5:45 am-11:45 am

Nonstop4h 00m

Chicago Midway

Tue 1/6

8:10 am-2:55 pm

2 stops8h 45m

$276

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 $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 $257.

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 $358. Flights from California to Illinois on a Sunday will generally be more expensive and average around $441. 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 $273. 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 O'Hare Intl 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 $301 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 $244 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?

No. A direct flight is the cheapest option for a flight between 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

$128

Fastest flight time

3h 05m

Direct flights

Every day

Airports in Illinois

1 airport
The best one-way flight to Illinois from California in the past 72 hours is $128. The best round-trip flight deal from California to Illinois found on momondo in the last 72 hours is $258.
The fastest flight from California to Illinois takes 3h 05m
Direct flights go from California to Illinois every day.
There is 1 airport near Illinois: 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
Spirit AirlinesPriceFrom $77Free CancellationRating
6.3
8,156 reviews
Search Spirit Airlines flights
FrontierPriceFrom $87Free CancellationRating
5.8
3,090 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $108Free CancellationRating
7.8
2,817 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $128Free CancellationRating
7.9
8,010 reviews
Search Delta flights
Sun Country AirPriceFrom $130Free CancellationRating
6.9
334 reviews
Search Sun Country Air flights
United AirlinesPriceFrom $133Free CancellationRating
7.4
9,064 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $139Free CancellationRating
8.0
11,402 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $166Free CancellationRating
7.2
11,047 reviews
Search American Airlines flights
SouthwestPriceFrom $179Free CancellationRating
8.0
4,250 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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