HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Illinois

$59+ Cheap flights from California to Illinois

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 5/29. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ORD
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from California to Illinois with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from California to Illinois

Keep the following information in mind while searching for California to Illinois flight deals. Data was last updated April 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$159
(FlightHub)

One-way from

$59
(Cheapflightsfares)

Popular in

December

Cheapest in

February

Average price

$313

Good round-trip deal

$260 or less

Good one-way deal

$144 or less
Provider with most accurate pricing for Los Angeles-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Chicago (CHI) flights.
Search Deals
From California to Illinois
Search Deals
One-way flight from California to Illinois
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($18 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals
Price to beat on a round-trip flight from California to Illinois.
Search Deals
Price to beat on a one-way flight from California to Illinois.
Search Deals

Find flight deals from California to Illinois

Cheapest flights from California to Illinois
Explore the most affordable flight options available from California to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 30, 2025.

This FlightHub deal was found by Cheapflights users on 4/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/610:35 pmLAX - ORD
1 stop9h 03mMultiple Airlines
Sat 5/178:37 amORD - LAX
Nonstop4h 31mMultiple Airlines
Deal found 4/29$159
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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.
Wed 5/286:52 pmLAX - ORD
1 stop14h 03mSpirit Airlines
Wed 6/49:02 pmORD - LAX
1 stop11h 49mSpirit Airlines
Deal found 4/29$161
This Frontier deal was found by Cheapflights users on 4/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/74:36 pmLAX - ORD
Nonstop4h 19mFrontier
Mon 6/96:10 amORD - LAX
Nonstop4h 33mFrontier
Deal found 4/29$166
This Frontier deal was found by Cheapflights users on 4/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/126:15 amLAX - MDW
1 stop10h 53mFrontier
Sat 5/1710:48 amMDW - LAX
1 stop12h 47mFrontier
Deal found 4/29$178
This CheapOair deal was found by Cheapflights users on 4/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/65:45 amSFO - MDW
1 stop7h 11mFrontier
Wed 6/112:10 pmMDW - SFO
1 stop9h 04mFrontier
Deal found 4/28$211
This CheapOair deal was found by Cheapflights users on 4/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/19:50 pmSFO - ORD
1 stop29h 20mFrontier
Sat 5/3111:55 amORD - SFO
1 stop12h 28mFrontier
Deal found 4/28$211
This Booking.com deal was found by Cheapflights users on 4/29. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/288:48 pmSAN - ORD
2 stops10h 07mSpirit Airlines
Sat 5/319:02 pmORD - SAN
1 stop12h 11mSpirit Airlines
Deal found 4/29$213
This Orbitz deal was found by Cheapflights users on 4/29. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/1411:45 pmSFO - ORD
1 stop9h 58mMultiple Airlines
Sat 5/317:59 pmORD - SFO
Nonstop4h 50mMultiple Airlines
Deal found 4/29$213
This Kiwi.com deal was found by Cheapflights users on 4/28. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/194:53 pmSAN - ORD
Nonstop4h 03mFrontier
Sun 6/221:56 pmORD - SAN
Nonstop4h 12mFrontier
Deal found 4/28$215
This Southwest deal was found by Cheapflights users on 4/28. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/107:45 pmSFO - MDW
1 stop7h 15mSouthwest
Sat 6/287:00 pmMDW - SFO
1 stop6h 10mSouthwest
Deal found 4/28$216
This FlightHub deal was found by Cheapflights users on 4/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/125:50 pmSAN - ORD
1 stop10h 22mMultiple Airlines
Mon 6/231:56 pmORD - SAN
Nonstop4h 12mMultiple Airlines
Deal found 4/29$216
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/412:33 pmSFO - ORD
Nonstop4h 26mAlaska Airlines
Fri 6/67:59 pmORD - SFO
Nonstop4h 50mAlaska Airlines
Deal found 4/29$217

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated April 30, 2025.
Use the filters below to find and compare flights from California to Illinois that are best for you.

Fly from

California

Fly to

Illinois

Route

Depart

Return

Price

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Tue 5/6

10:35 pm-9:38 am

1 stop9h 03m

Chicago O'Hare Intl

Sat 5/17

8:37 am-11:08 am

Nonstop4h 31m

$159

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Wed 5/28

6:52 pm-10:55 am

1 stop14h 03m

Chicago O'Hare Intl

Wed 6/4

9:02 pm-6:51 am

1 stop11h 49m

$161

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Sat 6/7

4:36 pm-10:55 pm

Nonstop4h 19m

Chicago O'Hare Intl

Mon 6/9

6:10 am-8:43 am

Nonstop4h 33m

$166

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Mon 5/12

6:15 am-7:08 pm

1 stop10h 53m

Chicago Midway

Sat 5/17

10:48 am-9:35 pm

1 stop12h 47m

$178

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Fri 6/6

5:45 am-2:56 pm

1 stop7h 11m

Chicago Midway

Wed 6/11

2:10 pm-9:14 pm

1 stop9h 04m

$211

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 5/10

11:50 pm-11:00 am

1 stop9h 10m

Chicago O'Hare Intl

Thu 5/15

7:35 am-3:44 pm

1 stop10h 09m

$212

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 5/28

8:48 pm-8:55 am

2 stops10h 07m

Chicago O'Hare Intl

Sat 5/31

9:02 pm-7:13 am

1 stop12h 11m

$213

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Wed 5/14

11:45 pm-11:43 am

1 stop9h 58m

Chicago O'Hare Intl

Sat 5/31

7:59 pm-10:49 pm

Nonstop4h 50m

$213

San DiegoChicago

SAN - ORD

SANORD

San Diego

Thu 6/19

4:53 pm-10:56 pm

Nonstop4h 03m

Chicago O'Hare Intl

Sun 6/22

1:56 pm-4:08 pm

Nonstop4h 12m

$215

San FranciscoChicago

SFO - MDW

SFOMDW

San Francisco

Tue 6/10

7:45 pm-5:00 am

1 stop7h 15m

Chicago Midway

Sat 6/28

7:00 pm-11:10 pm

1 stop6h 10m

$216

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 60 results
1
2
3
...
6

Best time to book a flight from California to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from California 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 California to Illinois

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

Currently, August is the cheapest month in which you can book a flight from California to Illinois (average of $245). Flying from California to Illinois in March is currently the most expensive (average of $321). 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 CA to IL?

Find hourly flight availability from California to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 30, 2025.

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

Weekly flight availability from California to Illinois

Explore weekly flight availability from California to Illinois. 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 April 30, 2025.

The most flights from USCA to USIL are scheduled on a Tuesday (97 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (46 on average).

Rainfall in Illinois by month

Plan your trip to Illinois by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

Plan your trip to Illinois by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated April 30, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from California to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,295 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,406 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Crew

8.5

Entertainment

7.1

Boarding

8.2

Comfort

7.9

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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

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

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $59. Users have also found prices from $78 and $100 on Frontier and Southwest, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from California to Illinois 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 California to Illinois?

    Currently, August is the cheapest month in which you can book a flight from California to Illinois (average of $245). Flying from California to Illinois in March is currently the most expensive (average of $321). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for California to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Los Angeles flights
Los Angeles to John F Kennedy Intl flights
LaGuardia to Fort Lauderdale flights
LaGuardia to Dallas/Fort Worth flights
John F Kennedy Intl to Miami flights
Newark to Fort Lauderdale flights
Dallas/Fort Worth to LaGuardia flights
Newark to Las Vegas flights
LaGuardia to Miami flights
Newark to Miami flights
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to Seattle flights
San Francisco to John F Kennedy Intl flights
Los Angeles to Seattle flights
Seattle to Los Angeles flights
Los Angeles to Newark flights
LaGuardia to O'Hare Intl flights
O'Hare Intl to LaGuardia flights
Dallas/Fort Worth to O'Hare Intl flights
John F Kennedy Intl to Seattle flights
Newark to Dallas/Fort Worth flights
John F Kennedy Intl to San Francisco flights
John F Kennedy Intl to Las Vegas flights
Newark to Los Angeles flights
John F Kennedy Intl to O'Hare Intl flights
Newark to Seattle flights
John F Kennedy Intl to Dallas/Fort Worth flights
O'Hare Intl to Dallas/Fort Worth flights
Newark to Orlando flights
Dallas/Fort Worth to Newark flights
John F Kennedy Intl to Orlando flights
LaGuardia to Orlando flights
John F Kennedy Intl to Fort Lauderdale flights
Los Angeles to Dallas/Fort Worth flights
John F Kennedy Intl to Atlanta flights
Seattle to Dallas/Fort Worth flights
LaGuardia to Atlanta flights
Seattle to John F Kennedy Intl flights
Newark to Atlanta flights
San Francisco to Newark flights
Newark to O'Hare Intl flights
Los Angeles to LaGuardia flights
LaGuardia to Los Angeles flights
Los Angeles to Honolulu flights
Dallas/Fort Worth to Las Vegas flights
O'Hare Intl to Las Vegas flights
John F Kennedy Intl to Hobby flights
Dallas/Fort Worth to Los Angeles flights
LaGuardia to Las Vegas flights
O'Hare Intl to John F Kennedy Intl flights

Top 10 airlines flying from California to Illinois

Discover the top 10 airlines that operate flights from California to Illinois. 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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$49Average$120FlexibilityNo cancel feeOn-time88%
FrontierCheapest$55Average$227FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$74Average$232FlexibilityNo cancel feeOn-time65%
Sun Country AirCheapest$130Average$330FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$138Average$415FlexibilityNo cancel feeOn-time75%
Hawaiian AirlinesCheapest$138Average$337FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$157Average$438FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$179Average$468FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$181Average$475FlexibilityNo cancel feeOn-time71%
DeltaCheapest$235Average$426FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.