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Illinois

$67+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ORD
Apr 1 — Apr 81
Tue 4/1
Tue 4/8
1 adult, Economy
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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 March 27, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$149
(CheapOair)

One-way from

$67
(Cheapflightsfares)

Popular in

March

Cheapest in

February

Average price

$354

Good round-trip deal

$257 or less

Good one-way deal

$148 or less
Provider with most accurate pricing for Los Angeles-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Los Angeles-Chicago (CHI) flights.
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From California to Illinois
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One-way flight from California to Illinois
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High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Price to beat on a round-trip flight from California to Illinois.
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Price to beat on a one-way flight from California to Illinois.
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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 March 27, 2025.

This CheapOair deal was found by Cheapflights users on 3/27. 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 4/249:21 pmBUR - ORD
1 stop7h 12mSpirit Airlines
Sun 4/277:12 pmORD - BUR
1 stop13h 58mSpirit Airlines
Deal found 3/27$149
This Cheapflightsfares deal was found by Cheapflights users on 3/26. 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.
Thu 4/1011:40 pmLAX - ORD
Nonstop4h 05mSpirit Airlines
Sun 4/139:38 pmORD - LAX
Nonstop4h 42mSpirit Airlines
Deal found 3/26$151
This Southwest deal was found by Cheapflights users on 3/27. 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.
Sat 5/311:10 pmLAX - MDW
Nonstop4h 05mSouthwest
Tue 5/61:50 pmMDW - LAX
Nonstop4h 30mSouthwest
Deal found 3/27$179
This American Airlines deal was found by Cheapflights users on 3/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/64:20 pmLAX - ORD
Nonstop4h 12mAmerican Airlines
Sat 5/103:15 pmORD - LAX
Nonstop4h 33mAmerican Airlines
Deal found 3/27$179
This Cheapflightsfares deal was found by Cheapflights users on 3/26. 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 5/78:48 pmSAN - ORD
2 stops10h 07mSpirit Airlines
Wed 5/2111:50 amORD - SAN
1 stop10h 03mSpirit Airlines
Deal found 3/26$193
This Frontier deal was found by Cheapflights users on 3/26. 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 6/164:15 pmSAN - ORD
Nonstop4h 16mFrontier
Wed 6/251:08 pmORD - SAN
Nonstop4h 22mFrontier
Deal found 3/26$197
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 7/3011:40 amSAN - ORD
1 stop6h 06mMultiple Airlines
Tue 8/51:08 pmORD - SAN
Nonstop4h 22mMultiple Airlines
Deal found 3/27$201
This United Airlines deal was found by Cheapflights users on 3/26. 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.
Fri 4/184:25 pmSFO - ORD
1 stop6h 10mUnited Airlines
Sun 4/206:30 amORD - SFO
Nonstop4h 50mUnited Airlines
Deal found 3/26$208
This American Airlines deal was found by Cheapflights users on 3/26. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/32:50 pmSFO - ORD
Nonstop4h 33mAmerican Airlines
Thu 6/56:45 amORD - SFO
Nonstop4h 38mAmerican Airlines
Deal found 3/26$209
This Alaska Airlines deal was found by Cheapflights users on 3/27. 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.
Tue 4/296:00 amSFO - ORD
1 stop9h 00mAlaska Airlines
Tue 4/296:58 pmORD - SFO
Nonstop4h 59mAlaska Airlines
Deal found 3/27$211
This Southwest deal was found by Cheapflights users on 3/26. 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.
Sat 4/199:00 amSFO - MDW
1 stop7h 50mSouthwest
Wed 4/236:40 amMDW - SFO
1 stop6h 40mSouthwest
Deal found 3/26$216
This Southwest deal was found by Cheapflights users on 3/26. 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.
Sat 5/35:15 amSFO - ORD
1 stop7h 45mSouthwest
Tue 5/65:25 pmORD - SFO
1 stop6h 50mSouthwest
Deal found 3/26$216

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 March 27, 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

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Thu 4/24

9:21 pm-6:33 am

1 stop7h 12m

Chicago O'Hare Intl

Sun 4/27

7:12 pm-7:10 am

1 stop13h 58m

$149

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Thu 4/10

11:40 pm-5:45 am

Nonstop4h 05m

Chicago O'Hare Intl

Sun 4/13

9:38 pm-12:20 am

Nonstop4h 42m

$151

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Sat 5/3

11:10 pm-5:15 am

Nonstop4h 05m

Chicago Midway

Tue 5/6

1:50 pm-4:20 pm

Nonstop4h 30m

$179

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Tue 5/6

4:20 pm-10:32 pm

Nonstop4h 12m

Chicago O'Hare Intl

Sat 5/10

3:15 pm-5:48 pm

Nonstop4h 33m

$179

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 5/7

8:48 pm-8:55 am

2 stops10h 07m

Chicago O'Hare Intl

Wed 5/21

11:50 am-7:53 pm

1 stop10h 03m

$193

San DiegoChicago

SAN - ORD

SANORD

San Diego

Mon 6/16

4:15 pm-10:31 pm

Nonstop4h 16m

Chicago O'Hare Intl

Wed 6/25

1:08 pm-3:30 pm

Nonstop4h 22m

$197

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 7/30

11:40 am-7:46 pm

1 stop6h 06m

Chicago O'Hare Intl

Tue 8/5

1:08 pm-3:30 pm

Nonstop4h 22m

$201

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 4/18

4:25 pm-12:35 am

1 stop6h 10m

Chicago O'Hare Intl

Sun 4/20

6:30 am-9:20 am

Nonstop4h 50m

$208

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 6/3

2:50 pm-9:23 pm

Nonstop4h 33m

Chicago O'Hare Intl

Thu 6/5

6:45 am-9:23 am

Nonstop4h 38m

$209

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Tue 4/29

6:00 am-5:00 pm

1 stop9h 00m

Chicago O'Hare Intl

Tue 4/29

6:58 pm-9:57 pm

Nonstop4h 59m

$211

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Showing 1-10 of 60 results
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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 $323). 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 March 27, 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 March 27, 2025.

The most flights from USCA to USIL are scheduled on a Thursday (101 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (34 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 March 27, 2025.
See what other customers who have flown with Southwest, Alaska Airlines 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.
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Delta
8.0
Very good
7,895 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
Hawaiian Airlines
7.9
Good
2,336 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Entertainment

7.6

Overall

8.1

Comfort

8.1

Food

7.1

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Merlyn,Feb 2025

LAX - SMF

New Terminal is neat, lost of stores and places to catch a bite.

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 $67. Users have also found prices from $90 and $90 on Southwest and United Airlines, 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 $323). 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 California to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
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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 March 27, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$49Average$120FlexibilityNo cancel feeOn-time88%
FrontierCheapest$66Average$225FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$74Average$236FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$115Average$422FlexibilityNo cancel feeOn-time75%
Sun Country AirCheapest$149Average$362FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$157Average$442FlexibilityNo cancel feeOn-time63%
Hawaiian AirlinesCheapest$178Average$337FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$179Average$476FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$183Average$477FlexibilityNo cancel feeOn-time71%
DeltaCheapest$221Average$443FlexibilityNo cancel feeOn-timeN/A
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