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$33+ Cheap flights from Illinois to California

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LAX
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Illinois to California

Keep the following information in mind while searching for Illinois to California flight deals. Data was last updated September 11, 2025.

Round-trip from

$119
(Gotogate)

One-way from

$33
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$229

Good round-trip deal

$168 or less

Good one-way deal

$98 or less
From Illinois to California
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One-way flight from Illinois to California
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Highest demand for flights based on searches. 10% potential increase in price ($31 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Illinois to California.
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Price to beat on a one-way flight from Illinois to California.
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Find flight deals from Illinois to California

Cheapest flights from Illinois to California
Explore the most affordable flight options available from Illinois to California. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Gotogate deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/412:46 pmORD - BUR
1 stop10h 34mSpirit Airlines
Sat 10/1112:13 pmBUR - ORD
1 stop10h 04mSpirit Airlines
Deal found 9/11$119
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/19:00 amORD - LAX
1 stop6h 33mMultiple Airlines
Sat 10/44:51 pmLAX - ORD
Nonstop4h 22mMultiple Airlines
Deal found 9/10$122
This Cheapflightsfares deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/309:00 amORD - LAX
1 stop11h 55mSpirit Airlines
Tue 10/79:20 amLAX - ORD
1 stop8h 30mSpirit Airlines
Deal found 9/11$123
This CheapOair deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:09 pmORD - LAX
Nonstop4h 31mSpirit Airlines
Wed 10/89:20 amLAX - ORD
1 stop8h 30mSpirit Airlines
Deal found 9/10$125
This Mytrip deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/47:09 pmORD - LAX
Nonstop4h 31mMultiple Airlines
Sun 10/51:45 pmLAX - ORD
1 stop6h 55mMultiple Airlines
Deal found 9/10$127
This Cheapflightsfares deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:09 pmORD - LAX
Nonstop4h 31mSpirit Airlines
Thu 10/25:50 amLAX - ORD
Nonstop4h 09mSpirit Airlines
Deal found 9/10$128
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/157:15 amORD - ONT
1 stop18h 35mFrontier
Wed 11/126:53 amONT - ORD
1 stop15h 19mFrontier
Deal found 9/9$129
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:09 pmORD - LAX
Nonstop4h 31mSpirit Airlines
Sat 10/119:22 amLAX - ORD
1 stop12h 55mSpirit Airlines
Deal found 9/9$129
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:00 amORD - LAX
Nonstop4h 29mMultiple Airlines
Wed 10/112:05 pmLAX - ORD
Nonstop4h 09mMultiple Airlines
Deal found 9/9$130
This Kiwi.com deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/207:00 amORD - LAX
Nonstop4h 29mMultiple Airlines
Sat 9/2712:05 pmLAX - ORD
Nonstop4h 09mMultiple Airlines
Deal found 9/9$131
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/17:15 amORD - ONT
1 stop18h 35mFrontier
Wed 11/56:53 amONT - ORD
1 stop15h 19mFrontier
Deal found 9/10$132
This Kiwi.com deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/19:00 amORD - LAX
1 stop6h 33mMultiple Airlines
Sun 10/51:45 pmLAX - ORD
1 stop6h 55mMultiple Airlines
Deal found 9/10$132

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to California 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Illinois to California that are best for you.

Fly from

Illinois

Fly to

California

Route

Depart

Return

Price

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Tue 11/11

7:15 am-9:20 am

Nonstop4h 05m

Las Vegas Harry Reid Intl

Thu 11/13

4:55 pm-10:35 pm

Nonstop3h 40m

$147

ChicagoLas Vegas

ORD - LAS

ORDLAS

Chicago O'Hare Intl

Wed 11/5

7:15 am-9:20 am

Nonstop4h 05m

Las Vegas Harry Reid Intl

Wed 11/19

4:55 pm-10:35 pm

Nonstop3h 40m

$147

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Wed 12/10

5:15 am-7:10 am

Nonstop3h 55m

Las Vegas Harry Reid Intl

Fri 12/12

11:40 pm-5:05 am

Nonstop3h 25m

$147

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 11/12

1:00 pm-5:05 pm

1 stop6h 05m

San Diego

Tue 11/18

6:40 am-9:50 pm

2 stops13h 10m

$149

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Mon 11/24

3:40 pm-5:35 pm

Nonstop3h 55m

Las Vegas Harry Reid Intl

Thu 11/27

11:40 pm-5:05 am

Nonstop3h 25m

$153

ChicagoOntario

ORD - ONT

ORDONT

Chicago O'Hare Intl

Mon 9/22

9:54 pm-9:56 pm

1 stop26h 02m

Ontario

Mon 9/29

4:08 pm-9:28 pm

1 stop27h 20m

$154

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Tue 10/7

5:25 pm-9:25 pm

1 stop6h 00m

San Diego

Sat 10/11

1:05 pm-11:05 pm

1 stop8h 00m

$155

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Sat 10/11

6:26 pm-9:01 pm

Nonstop4h 35m

Los Angeles

Sat 10/18

5:00 pm-11:15 pm

Nonstop4h 15m

$165

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Wed 10/8

8:20 am-11:20 am

Nonstop5h 00m

San Diego

Sat 10/11

5:19 pm-11:59 pm

Nonstop4h 40m

$165

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Thu 11/13

8:59 pm-11:19 pm

Nonstop4h 20m

San Diego

Sat 11/15

1:41 pm-7:55 pm

Nonstop4h 14m

$167

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to California

Have a flexible travel schedule? Discover the best time to fly to California from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to California

What is the cheapest month to book a flight from Illinois to California?

Currently, January is the cheapest month in which you can book a flight from Illinois to California (average of $246). Flying from Illinois to California in March is currently the most expensive (average of $325). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to CA?

Find hourly flight availability from Illinois to California. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to California as you normally would.

Weekly flight availability from Illinois to California

Explore weekly flight availability from Illinois to California. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated September 11, 2025.

The most flights from USIL to USCA are scheduled on a Thursday (118 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (78 on average).

Reviews of airlines servicing California

Get insights into the airlines that provide service to California. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to California. Reviews last updated September 11, 2025.
See what other customers who have flown with Southwest, United Airlines, and American Airlines from Illinois to California have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,248 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
8,937 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Spirit Airlines
6.3
Okay
8,023 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,177 reviews
Southwest
8.0
Very good
4,248 reviews

Entertainment

7.5

Crew

8.6

Boarding

8.1

Comfort

8.0

Overall

8.0

Food

7.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Related info for your journey

Find useful and relevant information for your journey from Illinois to California. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to California?

    Departing from Illinois to California will take you 4h 05m. Illinois and California are separated by a distance of 1510 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to California one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $34. Users have also found prices from $74 and $77 on Southwest and Alaska Airlines, respectively.

  • Can I find deals for flights from Illinois to California that include hotel bookings?

    Yes. In addition to deals on Illinois to California flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to California?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to California.

  • Can I find deals for business class flights from Illinois to California?

    Yes. Cheapflights offers flight deals from Illinois to California by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to California?

    Currently, January is the cheapest month in which you can book a flight from Illinois to California (average of $246). Flying from Illinois to California in March is currently the most expensive (average of $325). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Illinois to California

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Illinois to California

Discover the top 9 airlines that operate flights from Illinois to California. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$224FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$83Average$218FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$108Average$252FlexibilityNo cancel feeOn-time85%
Sun Country AirCheapest$112Average$359FlexibilityNo cancel feeOn-time83%
DeltaCheapest$128Average$333FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$139Average$372FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$152Average$435FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$163Average$473FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$199Average$457FlexibilityNo cancel feeOn-time69%

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