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Cheap flights from California to Illinois from $80

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 5/19. 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.
Multiple Airlines Logo
11:59 pm - 5:59 am
LAX
-
ORD
4h 00mnonstop
Multiple Airlines Logo
9:04 pm - 11:44 pm
ORD
-
LAX
4h 40mnonstop
$187Multiple Airlines
Sun, May 31 - Mon, Jun 8
Multiple Airlines Logo
12:26 am - 6:34 am
LAX
-
ORD
4h 08mnonstop
Multiple Airlines Logo
7:15 am - 9:41 am
ORD
-
LAX
4h 26mnonstop
$188Multiple Airlines
Sun, May 31 - Sat, Jun 13
Frontier Logo
5:50 pm - 11:59 pm
LAX
-
ORD
4h 09mnonstop
Frontier Logo
8:46 pm - 11:26 pm
ORD
-
LAX
4h 40mnonstop
$189Frontier
Sat, May 23 - Fri, May 29
Frontier Logo
12:26 am - 6:34 am
LAX
-
ORD
4h 08mnonstop
Frontier Logo
9:37 pm - 8:35 am
ORD
-
LAX
12h 58m
1 stop
$190Frontier
Tue, May 26 - Wed, Jun 3
Southwest Logo
1:50 pm - 10:50 pm
LAX
-
MDW
7h 00m
1 stop
Southwest Logo
10:15 am - 12:35 pm
MDW
-
LAX
4h 20mnonstop
$209Southwest
Wed, Aug 19 - Tue, Aug 25
Southwest Logo
1:50 pm - 10:50 pm
LAX
-
MDW
7h 00m
1 stop
Southwest Logo
9:25 am - 1:05 pm
MDW
-
LAX
5h 40m
1 stop
$214Southwest
Wed, Aug 19 - Tue, Aug 25
United Airlines Logo
6:40 am - 1:09 pm
SAN
-
ORD
4h 29mnonstop
United Airlines Logo
7:00 am - 9:28 am
ORD
-
SAN
4h 28mnonstop
$247United Airlines
Sat, May 23 - Sat, May 30
American Airlines Logo
10:45 pm - 5:18 am
SAN
-
ORD
4h 33mnonstop
American Airlines Logo
6:45 am - 9:04 am
ORD
-
SAN
4h 19mnonstop
$248American Airlines
Sat, May 23 - Sat, May 30
United Airlines Logo
6:59 pm - 5:40 am
ONT
-
ORD
8h 41m
1 stop
United Airlines Logo
8:18 pm - 10:51 pm
ORD
-
ONT
4h 33mnonstop
$273United Airlines
Tue, May 19 - Sat, May 30
American Airlines Logo
4:43 pm - 12:30 am
BUR
-
ORD
5h 47m
1 stop
American Airlines Logo
5:00 am - 8:46 am
ORD
-
BUR
5h 46m
1 stop
$279American Airlines
Wed, May 27 - Sun, May 31

United Airlines flights from California to Illinois

Our best United Airlines deals on California to Illinois flight tickets
United Airlines
Jun 2
LAX5:00 pmLos Angeles
4h 16m
ORD11:16 pmChicago O'Hare Intl
Jun 9
ORD2:30 pmChicago O'Hare Intl
4h 35m
LAX5:05 pmLos Angeles
$199
United Airlines
Jun 3
LAX2:41 pmLos Angeles
4h 09m
ORD8:50 pmChicago O'Hare Intl
Jun 10
ORD6:00 amChicago O'Hare Intl
4h 27m
LAX8:27 amLos Angeles
$204
United Airlines
May 27
LAX2:41 pmLos Angeles
4h 09m
ORD8:50 pmChicago O'Hare Intl
Jun 1
ORD7:00 amChicago O'Hare Intl
4h 33m
LAX9:33 amLos Angeles
$220

Frontier flights from California to Illinois

Our best Frontier deals on California to Illinois flight tickets
Frontier
May 23
LAX5:50 pmLos Angeles
4h 09m
ORD11:59 pmChicago O'Hare Intl
May 29
ORD8:46 pmChicago O'Hare Intl
4h 40m
LAX11:26 pmLos Angeles
$189
Frontier
May 26
LAX12:26 amLos Angeles
4h 08m
ORD6:34 amChicago O'Hare Intl
Jun 3
ORD9:37 pmChicago O'Hare Intl
12h 58m
1 stop
LAX8:35 amLos Angeles
$190
Frontier
May 22
LAX12:26 amLos Angeles
4h 08m
ORD6:34 amChicago O'Hare Intl
May 29
ORD8:46 pmChicago O'Hare Intl
4h 40m
LAX11:26 pmLos Angeles
$191

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 May 3, 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

Sun 5/31

11:59 pm-5:59 am

Nonstop4h 00m

Chicago O'Hare Intl

Mon 6/8

9:04 pm-11:44 pm

Nonstop4h 40m

$187
Quickest round-trip

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Sun 5/31

12:26 am-6:34 am

Nonstop4h 08m

Chicago O'Hare Intl

Sat 6/13

7:15 am-9:41 am

Nonstop4h 26m

$188

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Sat 5/23

5:50 pm-11:59 pm

Nonstop4h 09m

Chicago O'Hare Intl

Fri 5/29

8:46 pm-11:26 pm

Nonstop4h 40m

$189

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Tue 5/26

12:26 am-6:34 am

Nonstop4h 08m

Chicago O'Hare Intl

Wed 6/3

9:37 pm-8:35 am

1 stop12h 58m

$190

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Wed 8/19

1:50 pm-10:50 pm

1 stop7h 00m

Chicago Midway

Tue 8/25

10:15 am-12:35 pm

Nonstop4h 20m

$209

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Wed 8/19

1:50 pm-10:50 pm

1 stop7h 00m

Chicago Midway

Tue 8/25

9:25 am-1:05 pm

1 stop5h 40m

$214

San DiegoChicago

SAN - ORD

SANORD

San Diego

Sat 5/23

6:40 am-1:09 pm

Nonstop4h 29m

Chicago O'Hare Intl

Sat 5/30

7:00 am-9:28 am

Nonstop4h 28m

$247

San DiegoChicago

SAN - ORD

SANORD

San Diego

Sat 5/23

10:45 pm-5:18 am

Nonstop4h 33m

Chicago O'Hare Intl

Sat 5/30

6:45 am-9:04 am

Nonstop4h 19m

$248

OntarioChicago

ONT - ORD

ONTORD

Ontario

Tue 5/19

6:59 pm-5:40 am

1 stop8h 41m

Chicago O'Hare Intl

Sat 5/30

8:18 pm-10:51 pm

Nonstop4h 33m

$273

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Wed 5/27

4:43 pm-12:30 am

1 stop5h 47m

Chicago O'Hare Intl

Sun 5/31

5:00 am-8:46 am

1 stop5h 46m

$279

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 $301, 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 $304.

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 $368. Flights from California to Illinois on a Sunday will generally be more expensive and average around $440. 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 $295. Flights at noon are often more expensive with an average ticket price of $476.

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 $326 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 $271 on momondo.

Can stopping save me money on California to Illinois flights?

You could potentially save up to 5% 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

$163

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 $163. The best round-trip flight deal from California to Illinois found on momondo in the last 72 hours is $320.
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), 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 $51Free CancellationRating
5.6
2,969 reviews
Search Frontier flights
DeltaPriceFrom $93Free CancellationRating
7.9
8,459 reviews
Search Delta flights
Hawaiian AirlinesPriceFrom $101Free CancellationRating
7.8
2,837 reviews
Search Hawaiian Airlines flights
Spirit AirlinesPriceFrom $103Free CancellationRating
6.3
8,636 reviews
Search Spirit Airlines flights
United AirlinesPriceFrom $133Free CancellationRating
7.4
9,682 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $149Free CancellationRating
7.9
12,321 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $157Free CancellationRating
7.1
11,674 reviews
Search American Airlines flights
JetBluePriceFrom $166Free CancellationRating
7.1
2,966 reviews
Search JetBlue flights
SouthwestPriceFrom $179Free CancellationRating
8.0
4,310 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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Find better results for your trip to Illinois

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