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Cheap flights from California to Illinois from $97

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 9/8. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from California to Illinois

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:55 am - 7:02 pm
LAX
-
ORD
10h 07m
1 stop
Frontier Logo
2:41 pm - 12:11 am
ORD
-
LAX
11h 30m
1 stop
$229Frontier
Thu, Aug 20 - Thu, Aug 27
Frontier Logo
6:55 am - 7:02 pm
LAX
-
ORD
10h 07m
1 stop
Frontier Logo
2:41 pm - 12:11 am
ORD
-
LAX
11h 30m
1 stop
$230Frontier
Thu, Aug 20 - Thu, Aug 27
Southwest Logo
5:15 pm - 11:05 pm
LAX
-
MDW
3h 50mnonstop
Southwest Logo
7:00 am - 9:15 am
MDW
-
LAX
4h 15mnonstop
$237Southwest
Fri, Sep 11 - Mon, Sep 14
Southwest Logo
11:55 pm - 5:55 am
LAX
-
MDW
4h 00mnonstop
Southwest Logo
1:50 pm - 5:30 pm
MDW
-
LAX
5h 40m
1 stop
$243Southwest
Sat, Sep 5 - Fri, Sep 11
United Airlines Logo
1:18 pm - 9:52 pm
ONT
-
ORD
6h 34m
1 stop
United Airlines Logo
8:06 pm - 10:35 pm
ORD
-
ONT
4h 29mnonstop
$282United Airlines
Sat, Aug 15 - Mon, Aug 17
United Airlines Logo
4:55 pm - 10:59 pm
SAN
-
ORD
4h 04mnonstop
United Airlines Logo
8:16 pm - 10:41 pm
ORD
-
SAN
4h 25mnonstop
$287United Airlines
Fri, Oct 9 - Wed, Oct 14
Alaska Airlines Logo
1:03 pm - 7:21 pm
SAN
-
ORD
4h 18mnonstop
Alaska Airlines Logo
6:00 am - 1:19 pm
ORD
-
SAN
9h 19m
1 stop
$294Alaska Airlines
Wed, Aug 26 - Tue, Sep 1
American Airlines Logo
10:53 pm - 5:13 am
SFO
-
ORD
4h 20mnonstop
American Airlines Logo
9:05 pm - 11:45 pm
ORD
-
SFO
4h 40mnonstop
$300American Airlines
Fri, Aug 14 - Mon, Aug 17
American Airlines Logo
12:19 pm - 10:31 pm
SFO
-
ORD
8h 12m
1 stop
American Airlines Logo
3:20 pm - 6:09 pm
ORD
-
SFO
4h 49mnonstop
$305American Airlines
Fri, Sep 25 - Tue, Sep 29
Alaska Airlines Logo
8:00 am - 5:00 am
SJC
-
ORD
19h 00m
1 stop
Alaska Airlines Logo
6:20 am - 11:55 pm
ORD
-
SJC
19h 35m
1 stop
$330Alaska Airlines
Thu, Aug 6 - Sat, Aug 8

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United Airlines flights from California to Illinois

Our best United Airlines deals on California to Illinois flight tickets
United Airlines
Sep 3
LAX4:55 pmLos Angeles
4h 10m
ORD11:05 pmChicago O'Hare Intl
Sep 8
ORD5:52 pmChicago O'Hare Intl
4h 33m
LAX8:25 pmLos Angeles
$273
United Airlines
Sep 9
LAX8:15 amLos Angeles
4h 21m
ORD2:36 pmChicago O'Hare Intl
Sep 14
ORD1:58 pmChicago O'Hare Intl
4h 32m
LAX4:30 pmLos Angeles
$277
United Airlines
Aug 15
ONT1:18 pmOntario
6h 34m
1 stop
ORD9:52 pmChicago O'Hare Intl
Aug 17
ORD8:06 pmChicago O'Hare Intl
4h 29m
ONT10:35 pmOntario
$282

Alaska Airlines flights from California to Illinois

Our best Alaska Airlines deals on California to Illinois flight tickets
Alaska Airlines
Aug 26
SAN1:03 pmSan Diego
4h 18m
ORD7:21 pmChicago O'Hare Intl
Sep 1
ORD6:00 amChicago O'Hare Intl
9h 19m
1 stop
SAN1:19 pmSan Diego
$294
Alaska Airlines
Aug 13
SAN7:00 amSan Diego
4h 21m
ORD1:21 pmChicago O'Hare Intl
Aug 16
ORD6:20 amChicago O'Hare Intl
4h 34m
SAN8:54 amSan Diego
$308
Alaska Airlines
Nov 3
SAN7:02 amSan Diego
4h 21m
ORD1:23 pmChicago O'Hare Intl
Dec 18
ORD2:54 pmChicago O'Hare Intl
4h 25m
SAN5:19 pmSan Diego
$309

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 July 18, 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

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Thu 8/20

6:55 am-7:02 pm

1 stop10h 07m

Chicago O'Hare Intl

Thu 8/27

2:41 pm-12:11 am

1 stop11h 30m

$229

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Thu 8/20

6:55 am-7:02 pm

1 stop10h 07m

Chicago O'Hare Intl

Thu 8/27

2:41 pm-12:11 am

1 stop11h 30m

$230
Quickest round-trip

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Fri 9/11

5:15 pm-11:05 pm

Nonstop3h 50m

Chicago Midway

Mon 9/14

7:00 am-9:15 am

Nonstop4h 15m

$237

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Sat 9/5

11:55 pm-5:55 am

Nonstop4h 00m

Chicago Midway

Fri 9/11

1:50 pm-5:30 pm

1 stop5h 40m

$243

OntarioChicago

ONT - ORD

ONTORD

Ontario

Sat 8/15

1:18 pm-9:52 pm

1 stop6h 34m

Chicago O'Hare Intl

Mon 8/17

8:06 pm-10:35 pm

Nonstop4h 29m

$282

San DiegoChicago

SAN - ORD

SANORD

San Diego

Fri 10/9

4:55 pm-10:59 pm

Nonstop4h 04m

Chicago O'Hare Intl

Wed 10/14

8:16 pm-10:41 pm

Nonstop4h 25m

$287

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 8/26

1:03 pm-7:21 pm

Nonstop4h 18m

Chicago O'Hare Intl

Tue 9/1

6:00 am-1:19 pm

1 stop9h 19m

$294

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 8/14

10:53 pm-5:13 am

Nonstop4h 20m

Chicago O'Hare Intl

Mon 8/17

9:05 pm-11:45 pm

Nonstop4h 40m

$300

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 9/25

12:19 pm-10:31 pm

1 stop8h 12m

Chicago O'Hare Intl

Tue 9/29

3:20 pm-6:09 pm

Nonstop4h 49m

$305

San JoseChicago

SJC - ORD

SJCORD

San Jose

Thu 8/6

8:00 am-5:00 am

1 stop19h 00m

Chicago O'Hare Intl

Sat 8/8

6:20 am-11:55 pm

1 stop19h 35m

$330

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 $320, 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 October is also cheap. Prices for this month can be found on momondo for an average of $349.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from California to Illinois is on a Wednesday when prices can be found for as low as $404. Flights from California to Illinois on a Sunday will generally be more expensive and average around $493. 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 $343. Flights at noon are often more expensive with an average ticket price of $505.

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 $348 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 $293 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 31% 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

$193

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 $193. The best round-trip flight deal from California to Illinois found on momondo in the last 72 hours is $329.
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 Midway (MDW).
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 $98Free CancellationRating
5.6
2,794 reviews
Search Frontier flights
DeltaPriceFrom $122Free CancellationRating
7.8
8,476 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $137Free CancellationRating
7.8
2,823 reviews
Search Hawaiian Airlines flights
SouthwestPriceFrom $144Free CancellationRating
8.0
4,243 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $156Free CancellationRating
7.9
12,671 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $157Free CancellationRating
7.1
11,825 reviews
Search American Airlines flights
United AirlinesPriceFrom $163Free CancellationRating
7.4
10,006 reviews
Search United Airlines flights
JetBluePriceFrom $166Free CancellationRating
7.1
3,012 reviews
Search JetBlue 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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Find better results for your trip to Illinois

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Popular flights according to clicks in the last 7 days on momondo
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