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$57+ 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 2/2. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LAX
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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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 October 30, 2025.

This Frontier deal was found by Cheapflights users on 10/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/136:00 amORD - ONT
1 stop7h 10mFrontier
Thu 11/131:46 pmONT - ORD
1 stop7h 58mFrontier
Deal found 10/28$125
This CheapOair deal was found by Cheapflights users on 10/29. 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.
Thu 11/131:36 pmORD - ONT
1 stop7h 13mFrontier
Mon 11/171:46 pmONT - ORD
1 stop7h 58mFrontier
Deal found 10/29$130
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Thu 12/47:00 amORD - ONT
1 stop6h 09mFrontier
Sat 12/136:15 amONT - ORD
1 stop27h 27mFrontier
Deal found 10/28$131
This Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Mon 12/87:00 amORD - ONT
1 stop9h 25mFrontier
Mon 12/153:20 pmONT - ORD
1 stop6h 52mFrontier
Deal found 10/29$133
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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.
Fri 12/1212:59 pmORD - LAS
Nonstop4h 16mFrontier
Sun 12/146:00 amLAS - ORD
Nonstop3h 42mFrontier
Deal found 10/30$133
This CheapOair deal was found by Cheapflights users on 10/30. 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.
Sun 12/77:00 amORD - ONT
1 stop10h 06mFrontier
Thu 12/116:15 amONT - ORD
1 stop27h 27mFrontier
Deal found 10/30$134
This Cheapflightsfares deal was found by Cheapflights users on 10/30. 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.
Mon 12/87:00 amORD - LAS
1 stop26h 39mFrontier
Thu 12/1112:59 amLAS - ORD
1 stop21h 13mFrontier
Deal found 10/30$134
This Frontier deal was found by Cheapflights users on 10/30. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/72:01 pmMDW - LAS
1 stop10h 34mFrontier
Wed 12/101:16 amLAS - MDW
1 stop10h 48mFrontier
Deal found 10/30$134
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Mon 12/1511:01 amORD - ONT
1 stop26h 26mFrontier
Wed 12/316:45 amONT - ORD
1 stop15h 27mFrontier
Deal found 10/30$135
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 11/187:58 pmORD - LAS
Nonstop4h 09mSpirit Airlines
Thu 11/2011:59 pmLAS - ORD
Nonstop3h 33mSpirit Airlines
Deal found 10/29$135
This Kiwi.com deal was found by Cheapflights users on 10/30. 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 11/196:05 pmORD - LAS
1 stop7h 24mFrontier
Mon 11/2411:00 amLAS - ORD
1 stop10h 58mFrontier
Deal found 10/30$136
This CheapOair deal was found by Cheapflights users on 10/30. 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.
Fri 11/146:00 amORD - ONT
1 stop19h 50mFrontier
Mon 11/171:46 pmONT - ORD
1 stop7h 58mFrontier
Deal found 10/30$137

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 October 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$117
(Kiwi.com)

One-way from

$57
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$269

Good round-trip deal

$193 or less

Good one-way deal

$99 or less
Provider with most accurate pricing for Chicago (CHI)-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Los Angeles flights.
Search Deals
From Illinois to California
Search Deals
One-way flight from Illinois to California
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Illinois to California.
Search Deals
Price to beat on a one-way flight from Illinois to California.
Search Deals

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 October 30, 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 12/2

10:50 am-12:57 pm

Nonstop4h 07m

Las Vegas Harry Reid Intl

Thu 12/4

11:59 pm-5:33 am

Nonstop3h 34m

$145

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Sun 12/14

9:35 pm-11:30 pm

Nonstop3h 55m

Las Vegas Harry Reid Intl

Tue 12/23

5:15 am-10:40 am

Nonstop3h 25m

$145

ChicagoLos Angeles

MDW - LAX

MDWLAX

Chicago Midway

Fri 12/12

9:45 pm-12:10 am

Nonstop4h 25m

Los Angeles

Mon 12/15

11:00 pm-5:00 am

Nonstop4h 00m

$159

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Fri 12/5

1:00 pm-3:30 pm

Nonstop4h 30m

Los Angeles

Sat 12/6

12:25 am-6:19 am

Nonstop3h 54m

$159

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Fri 12/5

1:00 pm-3:30 pm

Nonstop4h 30m

Los Angeles

Thu 12/11

12:25 am-6:19 am

Nonstop3h 54m

$159

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Sun 1/25

5:10 am-7:25 am

Nonstop4h 15m

Las Vegas Harry Reid Intl

Thu 1/29

5:15 pm-10:40 pm

Nonstop3h 25m

$159

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Wed 12/3

8:12 pm-10:55 pm

Nonstop4h 43m

Los Angeles

Wed 12/10

4:52 pm-10:59 pm

Nonstop4h 07m

$159

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Sat 12/6

3:46 pm-6:21 pm

Nonstop4h 35m

Los Angeles

Mon 12/8

12:25 am-6:19 am

Nonstop3h 54m

$159

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

Sat 2/21

7:10 am-9:52 am

Nonstop4h 42m

San Diego

Wed 2/25

7:50 pm-5:03 am

1 stop7h 13m

$163

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

Thu 11/27

10:50 am-4:25 pm

1 stop7h 35m

Las Vegas Harry Reid Intl

Fri 12/5

6:05 am-11:35 am

Nonstop3h 30m

$170

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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, September is the cheapest month in which you can book a flight from Illinois to California (average of $80). Flying from Illinois to California in December is currently the most expensive (average of $144). 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 October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Illinois to California in the evening. If you’re flexible enough to do this you can expect to save up to 25% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from Illinois to California?

Use this chart to determine the cheapest time to fly round-trip from Illinois to California. Price data was last updated on December 1, 2024.

Travelers seeking maximum savings on their Illinois to California flight should consider departing on Wednesday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 30, 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
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

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
4,243 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

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
8,998 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

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
11,035 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

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
8,116 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

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
3,122 reviews
Southwest
8.0
Very good
4,243 reviews

Comfort

8.0

Entertainment

7.5

Food

7.0

Overall

8.0

Boarding

8.1

Crew

8.6

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 3h 55m. Illinois and California are separated by a distance of 1516 mi. Most flights are nonstop.

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

    For one-way options, check prices for Southwest. According to our data, you can fly for as low as $66. Users have also found prices from $72 and $79 on Spirit Airlines and United 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, September is the cheapest month in which you can book a flight from Illinois to California (average of $80). Flying from Illinois to California in December is currently the most expensive (average of $144). 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

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$79Average$220FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$83Average$214FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$108Average$227FlexibilityNo cancel feeOn-time85%
Sun Country AirCheapest$112Average$350FlexibilityNo cancel feeOn-time83%
DeltaCheapest$128Average$334FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$138Average$439FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$142Average$342FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$165Average$478FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$176Average$460FlexibilityNo cancel feeOn-time69%

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