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$61+ 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 1/12. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LAX
ene. 14 — ene. 211
mié. 1/14
mié. 1/21
1 adult, Economy
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Cheap 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 diciembre 15, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/14. 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.
jue. 12/256:02 pmORD - LAS
1 stop22h 26mMultiple Airlines
mar. 1/612:27 pmLAS - ORD
1 stop25h 33mMultiple Airlines
Deal found 12/14$166
This Booking.com deal was found by Cheapflights users on 12/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/256:02 pmORD - LAX
Nonstop4h 39mFrontier
mié. 12/319:41 amLAX - ORD
Nonstop4h 08mFrontier
Deal found 12/14$169
This Frontier deal was found by Cheapflights users on 12/13. 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.
mié. 12/243:51 pmORD - LAX
1 stop7h 55mFrontier
jue. 12/259:41 amLAX - ORD
Nonstop4h 08mFrontier
Deal found 12/13$181
This Super.com deal was found by Cheapflights users on 12/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/256:02 pmORD - LAX
Nonstop4h 39mFrontier
lun. 1/1910:45 pmLAX - ORD
1 stop13h 12mFrontier
Deal found 12/14$182
This Kiwi.com deal was found by Cheapflights users on 12/14. 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.
jue. 12/256:02 pmORD - LAX
Nonstop4h 39mFrontier
mar. 12/303:30 pmLAX - ORD
2 stops30h 42mFrontier
Deal found 12/14$184
This Kissandfly.com deal was found by Cheapflights users on 12/14. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/259:10 pmORD - LAX
Nonstop4h 49mSpirit Airlines
mié. 12/3111:59 pmLAX - ORD
Nonstop4h 06mSpirit Airlines
Deal found 12/14$187
This Trip.com deal was found by Cheapflights users on 12/14. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/304:47 pmORD - LAS
1 stop25h 09mFrontier
vie. 1/93:42 pmLAS - ORD
Nonstop3h 50mFrontier
Deal found 12/14$200
This Frontier deal was found by Cheapflights users on 12/12. 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.
mié. 12/315:19 pmSTL - LAS
Nonstop3h 49mFrontier
jue. 1/87:00 amLAS - STL
Nonstop3h 12mFrontier
Deal found 12/12$200
This United Airlines deal was found by Cheapflights users on 12/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/3111:35 amORD - LAS
1 stop8h 29mUnited Airlines
mié. 1/711:30 pmLAS - ORD
Nonstop3h 36mUnited Airlines
Deal found 12/14$201
This Expedia deal was found by Cheapflights users on 12/14. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/227:43 pmSTL - LAS
1 stop14h 22mFrontier
dom. 1/183:58 pmLAS - STL
Nonstop3h 16mFrontier
Deal found 12/14$204
This Super.com deal was found by Cheapflights users on 12/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/256:02 pmORD - LAX
Nonstop4h 39mFrontier
dom. 12/286:34 amLAX - ORD
1 stop15h 38mFrontier
Deal found 12/14$205
This Super.com deal was found by Cheapflights users on 12/14. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/2110:49 pmORD - LAS
Nonstop4h 09mFrontier
jue. 12/258:35 amLAS - ORD
Nonstop3h 42mFrontier
Deal found 12/14$209

Find flight deals from Illinois to California

Keep the following information in mind while searching for Illinois to California flight deals. Data was last updated diciembre 15, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$124
(Expedia)

One-way from

$61
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$374

Good round-trip deal

$205 or less

Good one-way deal

$121 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. 12% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 diciembre 15, 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

mar. 1/13

7:35 am-9:49 am

Nonstop4h 14m

Las Vegas Harry Reid Intl

jue. 1/15

11:30 pm-5:06 am

Nonstop3h 36m

$159

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

jue. 1/15

9:00 am-11:43 am

Nonstop4h 43m

San Diego

sáb. 1/17

5:10 pm-11:37 pm

Nonstop4h 27m

$167

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

mié. 1/14

9:05 am-11:48 am

Nonstop4h 43m

San Diego

vie. 1/16

2:11 pm-8:25 pm

Nonstop4h 14m

$167

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

mié. 1/7

9:00 am-11:43 am

Nonstop4h 43m

San Diego

lun. 1/12

5:10 pm-11:37 pm

Nonstop4h 27m

$167

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

lun. 1/12

3:44 pm-6:26 pm

Nonstop4h 42m

San Diego

mié. 1/14

8:00 am-2:29 pm

Nonstop4h 29m

$167

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

dom. 3/1

3:07 pm-5:52 pm

Nonstop4h 45m

San Diego

mar. 3/10

8:35 am-2:58 pm

Nonstop4h 23m

$167

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

mié. 1/14

9:00 am-11:43 am

Nonstop4h 43m

San Diego

vie. 1/16

5:10 pm-11:37 pm

Nonstop4h 27m

$167

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

dom. 2/15

8:20 am-11:09 am

Nonstop4h 49m

San Diego

sáb. 2/21

8:35 am-2:58 pm

Nonstop4h 23m

$167

ChicagoSan Diego

ORD - SAN

ORDSAN

Chicago O'Hare Intl

vie. 1/9

3:44 pm-6:26 pm

Nonstop4h 42m

San Diego

dom. 1/18

8:00 am-2:29 pm

Nonstop4h 29m

$167

ChicagoLas Vegas

MDW - LAS

MDWLAS

Chicago Midway

sáb. 1/17

7:50 pm-9:55 pm

Nonstop4h 05m

Las Vegas Harry Reid Intl

mié. 1/21

11:10 am-4:35 pm

Nonstop3h 25m

$169

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

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 July is currently the most expensive (average of $118). 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 diciembre 15, 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 21% 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 16, 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.

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 diciembre 15, 2025.

The most flights from USIL to USCA are scheduled on a Monday (100 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (6 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 diciembre 15, 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
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Overall

7.9

Entertainment

7.5

Comfort

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
7.9
Good
4,250 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Overall

7.9

Entertainment

7.5

Comfort

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
9,092 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Overall

7.9

Entertainment

7.5

Comfort

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
11,052 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Overall

7.9

Entertainment

7.5

Comfort

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
8,185 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Overall

7.9

Entertainment

7.5

Comfort

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
3,080 reviews
Southwest
7.9
Good
4,250 reviews

Crew

8.6

Boarding

8.1

Overall

7.9

Entertainment

7.5

Comfort

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 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 Spirit Airlines. According to our data, you can fly for as low as $43. Users have also found prices from $49 and $64 on Frontier and American 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 July is currently the most expensive (average of $118). 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 10 airlines flying from Illinois to California

Discover the top 10 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 diciembre 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$221FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$83Average$198FlexibilityNo cancel feeOn-time65%
Hawaiian AirlinesCheapest$108Average$232FlexibilityNo cancel feeOn-time85%
Sun Country AirCheapest$112Average$350FlexibilityNo cancel feeOn-time83%
DeltaCheapest$128Average$328FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$138Average$432FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$141Average$312FlexibilityNo cancel feeOn-time75%
JetBlueCheapest$153Average$366FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$161Average$473FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$163Average$445FlexibilityNo cancel feeOn-time69%

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