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Cheap flights from California to Illinois from $62

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 2/5. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:00 am - 11:42 amLAS-ORD
3h 42mnonstop
Frontier Logo
7:00 am - 7:39 amORD-LAS
26h 39m1 stop
$94Frontier
Find Deal
Fri, Dec 5 - Mon, Dec 8
Frontier Logo
12:59 am - 12:12 amLAS-ORD
21h 13m1 stop
Frontier Logo
12:59 pm - 3:15 pmORD-LAS
4h 16mnonstop
$98Frontier
Find Deal
Thu, Dec 4 - Sun, Dec 7
Spirit Airlines Logo
11:59 pm - 5:32 amLAS-ORD
3h 33mnonstop
Spirit Airlines Logo
4:58 pm - 7:04 pmORD-LAS
4h 06mnonstop
$127Spirit Airlines
Find Deal
Tue, Nov 25 - Thu, Nov 27
United Airlines Logo
11:59 pm - 5:33 amLAS-ORD
3h 34mnonstop
United Airlines Logo
8:02 pm - 10:14 pmORD-LAS
4h 12mnonstop
$131United Airlines
Find Deal
Thu, Dec 11 - Sun, Dec 14
Southwest Logo
4:55 pm - 10:35 pmLAS-ORD
3h 40mnonstop
Southwest Logo
7:15 am - 9:20 amORD-LAS
4h 05mnonstop
$136Southwest
Find Deal
Wed, Dec 3 - Wed, Dec 10
American Airlines Logo
7:00 am - 12:50 pmLAS-ORD
3h 50mnonstop
American Airlines Logo
6:55 pm - 9:13 pmORD-LAS
4h 18mnonstop
$141American Airlines
Find Deal
Sat, Dec 6 - Mon, Dec 8
Southwest Logo
4:55 pm - 10:35 pmLAS-ORD
3h 40mnonstop
Southwest Logo
7:15 am - 9:30 amORD-LAS
4h 15mnonstop
$145Southwest
Find Deal
Fri, Dec 12 - Sat, Jan 10
Spirit Airlines Logo
7:45 pm - 12:00 pmLAS-ORD
14h 15m1 stop
Spirit Airlines Logo
4:58 pm - 7:04 pmORD-LAS
4h 06mnonstop
$150Spirit Airlines
Find Deal
Wed, Nov 26 - Fri, Nov 28
American Airlines Logo
11:55 pm - 5:26 amLAS-ORD
3h 31mnonstop
American Airlines Logo
5:05 pm - 7:13 pmORD-LAS
4h 08mnonstop
$156American Airlines
Find Deal
Sat, Dec 6 - Mon, Dec 15
United Airlines Logo
12:25 am - 6:19 amLAX-ORD
3h 54mnonstop
United Airlines Logo
7:10 am - 9:50 amORD-LAX
4h 40mnonstop
$159United Airlines
Find Deal
Mon, Dec 8 - Thu, Dec 11

American Airlines flights from California to Illinois

Our best American Airlines deals on California to Illinois flight tickets
American Airlines
Dec 6
LAS7:00 amLas Vegas Harry Reid Intl
3h 50m
ORD12:50 pmChicago O'Hare Intl
Dec 8
ORD6:55 pmChicago O'Hare Intl
4h 18m
LAS9:13 pmLas Vegas Harry Reid Intl
$141
Find similar
American Airlines
Dec 6
LAS11:55 pmLas Vegas Harry Reid Intl
3h 31m
ORD5:26 amChicago O'Hare Intl
Dec 15
ORD5:05 pmChicago O'Hare Intl
4h 08m
LAS7:13 pmLas Vegas Harry Reid Intl
$156
Find similar
American Airlines
Jan 26
SAN6:20 amSan Diego
4h 09m
ORD12:29 pmChicago O'Hare Intl
Jan 29
ORD7:50 pmChicago O'Hare Intl
4h 36m
SAN10:26 pmSan Diego
$157
Find similar

Alaska Airlines flights from California to Illinois

Our best Alaska Airlines deals on California to Illinois flight tickets
Alaska Airlines
Dec 13
SAN5:53 pmSan Diego
3h 57m
ORD11:50 pmChicago O'Hare Intl
Jan 4
ORD3:37 pmChicago O'Hare Intl
4h 42m
SAN6:19 pmSan Diego
$167
Find similar
Alaska Airlines
Mar 3
SAN5:25 pmSan Diego
9h 39m
1 stop
ORD5:04 amChicago O'Hare Intl
Mar 4
ORD9:00 amChicago O'Hare Intl
4h 25m
SAN11:25 amSan Diego
$171
Find similar
Alaska Airlines
Feb 17
SAN5:00 pmSan Diego
4h 10m
ORD11:10 pmChicago O'Hare Intl
Feb 24
ORD2:00 pmChicago O'Hare Intl
8h 42m
1 stop
SAN8:42 pmSan Diego
$177
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 November 6, 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

Fri 12/5

6:00 am-11:42 am

Nonstop3h 42m

Chicago O'Hare Intl

Mon 12/8

7:00 am-7:39 am

1 stop26h 39m

$94

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 12/4

12:59 am-12:12 am

1 stop21h 13m

Chicago O'Hare Intl

Sun 12/7

12:59 pm-3:15 pm

Nonstop4h 16m

$98

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Tue 11/25

11:59 pm-5:32 am

Nonstop3h 33m

Chicago O'Hare Intl

Thu 11/27

4:58 pm-7:04 pm

Nonstop4h 06m

$127

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Thu 12/11

11:59 pm-5:33 am

Nonstop3h 34m

Chicago O'Hare Intl

Sun 12/14

8:02 pm-10:14 pm

Nonstop4h 12m

$131

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 12/3

4:55 pm-10:35 pm

Nonstop3h 40m

Chicago O'Hare Intl

Wed 12/10

7:15 am-9:20 am

Nonstop4h 05m

$136

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sat 12/6

7:00 am-12:50 pm

Nonstop3h 50m

Chicago O'Hare Intl

Mon 12/8

6:55 pm-9:13 pm

Nonstop4h 18m

$141

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Fri 12/12

4:55 pm-10:35 pm

Nonstop3h 40m

Chicago O'Hare Intl

Sat 1/10

7:15 am-9:30 am

Nonstop4h 15m

$145

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 11/26

7:45 pm-12:00 pm

1 stop14h 15m

Chicago O'Hare Intl

Fri 11/28

4:58 pm-7:04 pm

Nonstop4h 06m

$150

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Sat 12/6

11:55 pm-5:26 am

Nonstop3h 31m

Chicago O'Hare Intl

Mon 12/15

5:05 pm-7:13 pm

Nonstop4h 08m

$156

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Mon 12/8

12:25 am-6:19 am

Nonstop3h 54m

Chicago O'Hare Intl

Thu 12/11

7:10 am-9:50 am

Nonstop4h 40m

$159

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 $248.

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 $453. 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 $276. Flights at noon are often more expensive with an average ticket price of $459.

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 $298 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 $256 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

$110

Fastest flight time

3h 31m

Direct flights

Every day

Airports in Illinois

1 airport
The best one-way flight to Illinois from California in the past 72 hours is $110. The best round-trip flight deal from California to Illinois found on momondo in the last 72 hours is $260.
The fastest flight from California to Illinois takes 3h 31m
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
8,115 reviews
Search Spirit Airlines flights
FrontierPriceFrom $89Free CancellationRating
5.8
3,116 reviews
Search Frontier flights
Hawaiian AirlinesPriceFrom $108Free CancellationRating
7.8
2,804 reviews
Search Hawaiian Airlines flights
DeltaPriceFrom $128Free CancellationRating
7.9
8,001 reviews
Search Delta flights
Sun Country AirPriceFrom $130Free CancellationRating
6.9
335 reviews
Search Sun Country Air flights
United AirlinesPriceFrom $133Free CancellationRating
7.4
9,004 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $139Free CancellationRating
8.0
11,243 reviews
Search Alaska Airlines flights
American AirlinesPriceFrom $168Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights
SouthwestPriceFrom $179Free CancellationRating
8.0
4,240 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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Find better results for your trip to Illinois

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