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$53+ 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 3/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ORD
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from California to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from California (USCA) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$125
(Frontier)

One-way from

$53
(Trip.com)
From California to Illinois
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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 January 21, 2025.

This Frontier deal was found by Cheapflights users on 1/19. 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 3/1012:33 pmBUR - ORD
1 stop10h 11mFrontier
Sat 3/157:45 amORD - BUR
1 stop12h 23mFrontier
Deal found 1/19$125
This Cheapflightsfares deal was found by Cheapflights users on 1/21. 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 2/1912:40 pmOAK - ORD
1 stop7h 10mSpirit Airlines
Wed 2/261:32 pmORD - OAK
1 stop10h 40mSpirit Airlines
Deal found 1/21$132
This Priceline deal was found by Cheapflights users on 1/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1312:56 pmBUR - ORD
1 stop8h 43mMultiple Airlines
Sat 2/154:30 pmORD - BUR
1 stop6h 30mMultiple Airlines
Deal found 1/19$135
This Cheapflightsfares deal was found by Cheapflights users on 1/19. 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 2/129:55 pmBUR - ORD
1 stop6h 12mSpirit Airlines
Sat 2/154:30 pmORD - BUR
1 stop6h 30mSpirit Airlines
Deal found 1/19$137
This Kiwi.com deal was found by Cheapflights users on 1/20. 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 3/512:59 pmSAN - ORD
1 stop8h 40mFrontier
Sat 3/86:50 amORD - SAN
1 stop19h 24mFrontier
Deal found 1/20$152
This Cheapflightsfares deal was found by Cheapflights users on 1/20. 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 2/199:56 amSAN - ORD
1 stop9h 54mSpirit Airlines
Sun 2/2310:45 pmORD - SAN
1 stop12h 16mSpirit Airlines
Deal found 1/20$154
This CheapOair deal was found by Cheapflights users on 1/20. 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.
Tue 2/187:58 pmONT - ORD
1 stop11h 53mFrontier
Thu 2/206:50 amORD - ONT
1 stop19h 19mFrontier
Deal found 1/20$158
This CheapOair deal was found by Cheapflights users on 1/20. 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.
Tue 2/46:15 amSAN - ORD
1 stop21h 16mMultiple Airlines
Mon 2/108:23 pmORD - SAN
1 stop17h 42mMultiple Airlines
Deal found 1/20$169
This American Airlines deal was found by Cheapflights users on 1/19. 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.
Mon 2/1712:25 amLAX - ORD
Nonstop3h 49mAmerican Airlines
Sat 2/225:40 pmORD - LAX
Nonstop4h 42mAmerican Airlines
Deal found 1/19$179
This Mytrip deal was found by Cheapflights users on 1/20. 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.
Fri 2/142:35 pmLAX - MDW
1 stop7h 42mFrontier
Mon 2/178:44 pmMDW - LAX
1 stop14h 56mFrontier
Deal found 1/20$180
This Priceline deal was found by Cheapflights users on 1/19. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 2/2311:18 pmLAX - ORD
1 stop10h 24mMultiple Airlines
Wed 2/266:50 amORD - LAX
1 stop8h 45mMultiple Airlines
Deal found 1/19$180
This Booking.com deal was found by Cheapflights users on 1/19. 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.
Thu 5/12:35 pmSJC - ORD
1 stop12h 35mFrontier
Sun 5/45:25 pmORD - SJC
1 stop19h 39mFrontier
Deal found 1/19$180

Find flights from California to Illinois within your budget

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Mon 3/10

12:33 pm-12:44 am

1 stop10h 11m

Chicago O'Hare Intl

Sat 3/15

7:45 am-6:08 pm

1 stop12h 23m

$125

OaklandChicago

OAK - ORD

OAKORD

Oakland

Wed 2/12

12:40 pm-9:50 pm

1 stop7h 10m

Chicago O'Hare Intl

Wed 2/19

1:32 pm-10:12 pm

1 stop10h 40m

$131

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Thu 2/13

12:56 pm-11:39 pm

1 stop8h 43m

Chicago O'Hare Intl

Sat 2/15

4:30 pm-9:00 pm

1 stop6h 30m

$135

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Wed 2/12

9:55 pm-6:07 am

1 stop6h 12m

Chicago O'Hare Intl

Wed 2/19

10:45 pm-8:15 am

1 stop11h 30m

$137

San DiegoChicago

SAN - ORD

SANORD

San Diego

Fri 3/7

9:19 pm-5:15 am

1 stop5h 56m

Chicago O'Hare Intl

Sun 3/9

6:45 am-11:48 am

1 stop7h 03m

$152

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 2/19

9:56 am-9:50 pm

1 stop9h 54m

Chicago O'Hare Intl

Sun 2/23

10:45 pm-9:01 am

1 stop12h 16m

$154

OntarioChicago

ONT - ORD

ONTORD

Ontario

Tue 2/18

7:58 pm-9:51 am

1 stop11h 53m

Chicago O'Hare Intl

Thu 2/20

6:50 am-12:09 am

1 stop19h 19m

$158

San DiegoChicago

SAN - ORD

SANORD

San Diego

Thu 2/6

1:47 pm-11:44 pm

1 stop7h 57m

Chicago O'Hare Intl

Wed 2/12

10:45 pm-9:01 am

1 stop12h 16m

$160

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Mon 2/24

12:25 am-6:14 am

Nonstop3h 49m

Chicago O'Hare Intl

Tue 3/4

7:18 am-10:05 am

Nonstop4h 47m

$179

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Sun 2/23

11:18 pm-11:42 am

1 stop10h 24m

Chicago O'Hare Intl

Wed 2/26

6:50 am-1:35 pm

1 stop8h 45m

$180

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

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.

Travel insights for flights from California to Illinois

Get recent, data-driven insights about flights from California to Illinois including ideal travel times, pricing trends, and more.

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 $320). 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 January 21, 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 January 21, 2025.

The most flights from USCA to USIL are scheduled on a Monday (89 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (64 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 January 21, 2025.
See what other customers who have flown with Frontier, Spirit Airlines and American Airlines 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
4,659 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Southwest
8.1
Very good
4,659 reviews
Southwest
8.1
Very good
4,659 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Alaska Airlines
8.0
Very good
9,696 reviews
Southwest
8.1
Very good
4,659 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,659 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

United Airlines
7.4
Good
8,982 reviews
Southwest
8.1
Very good
4,659 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,659 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.7

Overall

8.1

Boarding

8.2

Food

7.2

Reviews

1 / 10

My original flight was delayed so they found this flight for me so I could arrive at a reasonable time

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 Frontier. According to our data, you can fly for as low as $53. Users have also found prices from $54 and $90 on Spirit Airlines 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 $320). 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 California to Illinois

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

Discover the top 9 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$49Average$120FlexibilityNo cancel feeOn-time88%
FrontierCheapest$77Average$216FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$82Average$235FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$100Average$420FlexibilityNo cancel feeOn-time75%
Sun Country AirCheapest$149Average$362FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$157Average$450FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$179Average$487FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$183Average$506FlexibilityNo cancel feeOn-time71%
DeltaCheapest$199Average$461FlexibilityNo cancel feeOn-timeN/A
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