Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from California to Illinois from $72

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 5/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from California to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:45 pm - 5:32 am
LAS
-
ORD
3h 47mnonstop
Frontier Logo
5:30 pm - 11:10 am
ORD
-
LAS
19h 40m
1 stop
$161Frontier
Tue, Jun 9 - Tue, Jul 7
Frontier Logo
10:25 pm - 9:27 am
LAS
-
ORD
9h 02m
1 stop
Frontier Logo
9:37 pm - 1:44 pm
ORD
-
LAS
18h 07m
1 stop
$163Frontier
Sat, May 16 - Tue, May 19
Frontier Logo
11:45 pm - 5:32 am
LAS
-
ORD
3h 47mnonstop
Frontier Logo
7:12 am - 9:28 am
ORD
-
LAS
4h 16mnonstop
$166Frontier
Wed, Jul 1 - Fri, Jul 3
Spirit Airlines Logo
7:30 am - 12:59 pm
LAS
-
ORD
3h 29mnonstop
Spirit Airlines Logo
9:59 pm - 11:50 pm
ORD
-
LAS
3h 51mnonstop
$169Spirit Airlines
Wed, Aug 26 - Mon, Aug 31
United Airlines Logo
4:41 pm - 10:59 pm
SAN
-
ORD
4h 18mnonstop
United Airlines Logo
8:05 pm - 10:34 pm
ORD
-
SAN
4h 29mnonstop
$227United Airlines
Thu, May 28 - Tue, Jun 2
United Airlines Logo
10:40 pm - 4:45 am
SAN
-
ORD
4h 05mnonstop
United Airlines Logo
8:00 pm - 10:39 pm
ORD
-
SAN
4h 39mnonstop
$235United Airlines
Thu, May 14 - Mon, May 18
American Airlines Logo
3:09 pm - 9:32 pm
SAN
-
ORD
4h 23mnonstop
American Airlines Logo
4:00 pm - 6:26 pm
ORD
-
SAN
4h 26mnonstop
$236American Airlines
Sat, May 16 - Sat, May 23
Southwest Logo
11:25 pm - 5:40 am
SFO
-
MDW
4h 15mnonstop
Southwest Logo
9:00 pm - 11:35 pm
MDW
-
SFO
4h 35mnonstop
$267Southwest
Fri, May 29 - Tue, Jun 2
Southwest Logo
9:15 pm - 7:35 am
SFO
-
MDW
8h 20m
1 stop
Southwest Logo
5:35 pm - 11:25 pm
MDW
-
SFO
7h 50m
1 stop
$268Southwest
Tue, May 12 - Tue, Jun 9
American Airlines Logo
5:30 am - 11:58 am
SFO
-
ORD
4h 28mnonstop
American Airlines Logo
9:04 pm - 11:47 pm
ORD
-
SFO
4h 43mnonstop
$271American Airlines
Sat, May 16 - Sat, May 30

Frontier flights from California to Illinois

Our best Frontier deals on California to Illinois flight tickets
Frontier
Jun 9
LAS11:45 pmLas Vegas Harry Reid Intl
3h 47m
ORD5:32 amChicago O'Hare Intl
Jul 7
ORD5:30 pmChicago O'Hare Intl
19h 40m
1 stop
LAS11:10 amLas Vegas Harry Reid Intl
$161
Frontier
May 16
LAS10:25 pmLas Vegas Harry Reid Intl
9h 02m
1 stop
ORD9:27 amChicago O'Hare Intl
May 19
ORD9:37 pmChicago O'Hare Intl
18h 07m
1 stop
LAS1:44 pmLas Vegas Harry Reid Intl
$163
Frontier
Jul 1
LAS11:45 pmLas Vegas Harry Reid Intl
3h 47m
ORD5:32 amChicago O'Hare Intl
Jul 3
ORD7:12 amChicago O'Hare Intl
4h 16m
LAS9:28 amLas Vegas Harry Reid Intl
$166

Delta flights from California to Illinois

Our best Delta deals on California to Illinois flight tickets
Delta
May 13
SAN12:41 pmSan Diego
9h 18m
1 stop
ORD11:59 pmChicago O'Hare Intl
May 20
ORD6:24 amChicago O'Hare Intl
6h 13m
1 stop
SAN10:37 amSan Diego
$239
Delta
Jun 6
SAN1:10 pmSan Diego
6h 40m
1 stop
ORD9:50 pmChicago O'Hare Intl
Jun 10
ORD6:30 amChicago O'Hare Intl
6h 13m
1 stop
SAN10:43 amSan Diego
$248
Delta
May 13
SAN12:41 pmSan Diego
9h 18m
1 stop
ORD11:59 pmChicago O'Hare Intl
May 19
ORD7:00 amChicago O'Hare Intl
9h 20m
1 stop
SAN2:20 pmSan Diego
$257

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 April 24, 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

Cheapest round-trip

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Tue 6/9

11:45 pm-5:32 am

Nonstop3h 47m

Chicago O'Hare Intl

Tue 7/7

5:30 pm-11:10 am

1 stop19h 40m

$161

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sat 5/16

10:25 pm-9:27 am

1 stop9h 02m

Chicago O'Hare Intl

Tue 5/19

9:37 pm-1:44 pm

1 stop18h 07m

$163

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 7/1

11:45 pm-5:32 am

Nonstop3h 47m

Chicago O'Hare Intl

Fri 7/3

7:12 am-9:28 am

Nonstop4h 16m

$166
Quickest round-trip

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 8/26

7:30 am-12:59 pm

Nonstop3h 29m

Chicago O'Hare Intl

Mon 8/31

9:59 pm-11:50 pm

Nonstop3h 51m

$169

San DiegoChicago

SAN - ORD

SANORD

San Diego

Thu 5/28

4:41 pm-10:59 pm

Nonstop4h 18m

Chicago O'Hare Intl

Tue 6/2

8:05 pm-10:34 pm

Nonstop4h 29m

$227

San DiegoChicago

SAN - ORD

SANORD

San Diego

Thu 5/14

10:40 pm-4:45 am

Nonstop4h 05m

Chicago O'Hare Intl

Mon 5/18

8:00 pm-10:39 pm

Nonstop4h 39m

$235

San DiegoChicago

SAN - ORD

SANORD

San Diego

Sat 5/16

3:09 pm-9:32 pm

Nonstop4h 23m

Chicago O'Hare Intl

Sat 5/23

4:00 pm-6:26 pm

Nonstop4h 26m

$236

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Fri 5/29

11:25 pm-5:40 am

Nonstop4h 15m

Chicago Midway

Tue 6/2

9:00 pm-11:35 pm

Nonstop4h 35m

$267

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Tue 5/12

9:15 pm-7:35 am

1 stop8h 20m

Chicago Midway

Tue 6/9

5:35 pm-11:25 pm

1 stop7h 50m

$268

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 5/16

5:30 am-11:58 am

Nonstop4h 28m

Chicago O'Hare Intl

Sat 5/30

9:04 pm-11:47 pm

Nonstop4h 43m

$271

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 August is also cheap. Prices for this month can be found on momondo for an average of $260.

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 $366. Flights from California to Illinois on a Sunday will generally be more expensive and average around $439. 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 $292. Flights at noon are often more expensive with an average ticket price of $475.

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 from California 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 $323 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 $267 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

$185

Fastest flight time

3h 08m

Direct flights

Every day

Airports in Illinois

98 airports
The best one-way flight to Illinois from California in the past 72 hours is $185. The best round-trip flight deal from California to Illinois found on momondo in the last 72 hours is $327.
The fastest flight from California to Illinois takes 3h 08m
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

Frequently asked questions about flying 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?

  • 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 $89Free CancellationRating
5.6
2,980 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $92Free CancellationRating
6.3
8,636 reviews
Search Spirit Airlines flights
DeltaPriceFrom $93Free CancellationRating
7.9
8,450 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $101Free CancellationRating
7.8
2,837 reviews
Search Hawaiian Airlines flights
United AirlinesPriceFrom $133Free CancellationRating
7.4
9,643 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $146Free CancellationRating
7.9
12,280 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $157Free CancellationRating
7.1
11,666 reviews
Search American Airlines flights
JetBluePriceFrom $166Free CancellationRating
7.2
2,953 reviews
Search JetBlue flights
SouthwestPriceFrom $179Free CancellationRating
8.0
4,334 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.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 5/24
Sun 5/31
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo
Flights to New Yorkfrom $64
Flights to Los Angelesfrom $46
Flights to Orlandofrom $45
Flights to Miamifrom $54
Flights to Chicagofrom $67
Flights to San Franciscofrom $83
Flights to Las Vegasfrom $46
Flights to Washington, D.C.from $56
Flights to Bostonfrom $73
Flights to Atlantafrom $40
Flights to Dallasfrom $62
Flights to Fort Lauderdalefrom $42