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Illinois

$54+ 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 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ORD
Dec 23 — Dec 301
Mon 12/23
Mon 12/30
1 adult, Economy
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Find cheap flights from California to Illinois with Cheapflights

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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 December 18, 2024.

Round-trip from

$108
(Frontier)

One-way from

$54
(Frontier)
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 December 18, 2024.

This Booking.com deal was found by Cheapflights users on 12/17. 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.
Mon 12/3012:59 amONT - ORD
1 stop10h 21mFrontier
Mon 1/66:00 amORD - ONT
1 stop19h 59mFrontier
Deal found 12/17$158
This FlightHub deal was found by Cheapflights users on 12/18. 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.
Wed 12/256:30 amLAX - ORD
1 stop15h 16mFrontier
Sun 1/58:34 pmORD - LAX
1 stop25h 57mFrontier
Deal found 12/18$169
This eDestinos deal was found by Cheapflights users on 12/17. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/284:41 pmLAX - MDW
1 stop5h 46mFrontier
Sun 1/124:35 pmMDW - LAX
1 stop23h 16mFrontier
Deal found 12/17$174
This Kiwi.com deal was found by Cheapflights users on 12/18. 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.
Tue 12/248:09 pmLAX - ORD
1 stop25h 37mMultiple Airlines
Wed 1/88:55 pmORD - LAX
1 stop12h 44mMultiple Airlines
Deal found 12/18$175
This Frontier deal was found by Cheapflights users on 12/17. 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.
Wed 12/2511:18 amBUR - ORD
1 stop10h 28mFrontier
Mon 1/66:00 amORD - BUR
1 stop7h 46mFrontier
Deal found 12/17$188
This Expedia deal was found by Cheapflights users on 12/17. 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.
Tue 12/246:37 pmLAX - ORD
1 stop8h 53mSpirit Airlines
Wed 1/86:15 amORD - LAX
Nonstop4h 38mSpirit Airlines
Deal found 12/17$194
This American Airlines deal was found by Cheapflights users on 12/17. 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.
Wed 12/2511:27 pmSFO - ORD
Nonstop4h 19mAmerican Airlines
Wed 1/88:30 amORD - SFO
Nonstop4h 54mAmerican Airlines
Deal found 12/17$227
This FlightHub deal was found by Cheapflights users on 12/17. 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.
Wed 12/256:25 amSAN - ORD
1 stop15h 21mFrontier
Sun 1/58:34 pmORD - SAN
1 stop14h 42mFrontier
Deal found 12/17$234
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Tue 12/314:55 pmSAN - ORD
Nonstop4h 03mUnited Airlines
Wed 1/17:10 amORD - SAN
Nonstop4h 37mUnited Airlines
Deal found 12/17$237
This CheapOair deal was found by Cheapflights users on 12/18. 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.
Wed 12/256:00 amSFO - MDW
1 stop13h 32mFrontier
Wed 1/88:15 amMDW - SFO
1 stop17h 56mFrontier
Deal found 12/18$238
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Wed 12/256:45 pmSFO - ORD
Nonstop4h 26mUnited Airlines
Mon 1/62:35 pmORD - SFO
Nonstop4h 55mUnited Airlines
Deal found 12/16$244
This eDestinos deal was found by Cheapflights users on 12/16. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/253:03 pmSFO - ORD
1 stop6h 43mFrontier
Fri 1/36:00 amORD - SFO
1 stop28h 09mFrontier
Deal found 12/16$247

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 December 18, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Thu 1/16

11:50 am-11:44 pm

1 stop9h 54m

Chicago O'Hare Intl

Mon 1/20

7:50 am-3:01 pm

1 stop9h 11m

$108

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Sat 1/11

7:22 pm-5:31 am

1 stop8h 09m

Chicago O'Hare Intl

Mon 1/13

7:50 am-3:06 pm

1 stop9h 16m

$129

OaklandChicago

OAK - ORD

OAKORD

Oakland

Wed 1/15

7:02 pm-5:31 am

1 stop8h 29m

Chicago O'Hare Intl

Wed 1/22

1:39 pm-9:35 pm

1 stop9h 56m

$131

BurbankChicago

BUR - ORD

BURORD

Burbank Bob Hope

Sat 2/1

7:22 pm-5:31 am

1 stop8h 09m

Chicago O'Hare Intl

Tue 2/4

1:39 pm-6:27 pm

1 stop6h 48m

$136

OntarioChicago

ONT - ORD

ONTORD

Ontario

Fri 1/10

10:40 am-12:35 am

1 stop11h 55m

Chicago O'Hare Intl

Mon 1/13

6:20 am-8:25 pm

1 stop16h 05m

$145

San DiegoChicago

SAN - ORD

SANORD

San Diego

Wed 1/8

6:15 am-10:57 pm

1 stop14h 42m

Chicago O'Hare Intl

Mon 1/13

3:56 pm-12:55 pm

3 stops22h 59m

$163

OntarioChicago

ONT - ORD

ONTORD

Ontario

Wed 1/29

3:04 pm-11:59 pm

1 stop6h 55m

Chicago O'Hare Intl

Tue 2/4

11:47 am-6:37 pm

1 stop8h 50m

$168

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Thu 1/2

10:24 am-1:07 am

1 stop12h 43m

Chicago O'Hare Intl

Sun 1/5

8:34 pm-8:31 pm

1 stop25h 57m

$169

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Tue 2/4

4:18 pm-5:31 am

1 stop11h 13m

Chicago O'Hare Intl

Sun 2/9

6:20 am-12:35 pm

1 stop8h 15m

$170

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Thu 2/13

2:35 pm-12:17 am

1 stop7h 42m

Chicago Midway

Sun 2/16

7:00 am-3:59 pm

1 stop10h 59m

$170

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

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, September is the cheapest month in which you can book a flight from California to Illinois (average of $232). Flying from California to Illinois in June is currently the most expensive (average of $308). 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 December 18, 2024.

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 December 18, 2024.

The most flights from USCA to USIL are scheduled on a Tuesday (98 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (1 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 December 18, 2024.
See what other customers who have flown with Alaska Airlines, Sun Country Air 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
4,848 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.7

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
4,848 reviews
Southwest
8.1
Very good
4,848 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.7

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
9,552 reviews
Southwest
8.1
Very good
4,848 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.7

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
8,604 reviews
Southwest
8.1
Very good
4,848 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.7

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

JetBlue
7.4
Good
3,279 reviews
Southwest
8.1
Very good
4,848 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.7

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
9,059 reviews
Southwest
8.1
Very good
4,848 reviews

Boarding

8.2

Overall

8.1

Crew

8.7

Comfort

8.1

Entertainment

7.7

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 $54. Users have also found prices from $65 and $84 on Spirit Airlines and American 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, September is the cheapest month in which you can book a flight from California to Illinois (average of $232). Flying from California to Illinois in June is currently the most expensive (average of $308). 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 December 18, 2024.
AirlineCheapestAverageFlexibilityOn-time
Allegiant AirCheapest$49Average$120FlexibilityNo cancel feeOn-time88%
FrontierCheapest$82Average$216FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$82Average$238FlexibilityNo cancel feeOn-time65%
Alaska AirlinesCheapest$100Average$415FlexibilityNo cancel feeOn-time75%
Sun Country AirCheapest$149Average$362FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$179Average$481FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$182Average$518FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$185Average$466FlexibilityNo cancel feeOn-time63%
DeltaCheapest$199Average$467FlexibilityNo cancel feeOn-timeN/A
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