$38+ 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 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — ORD
Feb 25 — Mar 41
1 adult, Economy
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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 February 20, 2025.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $105 (Cheapflightsfares) |
One-way from | $38 (Trip.com) |
Popular in | March |
Cheapest in | October |
Average price | $274 |
Good round-trip deal | $168 or less |
Good one-way deal | $61 or less |
Find flight deals from California to Illinois
Cheapest flights from California to IllinoisExplore 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 February 20, 2025.
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 February 20, 2025.
This Cheapflightsfares deal was found by Cheapflights users on 2/19. 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.
Tue 3/257:58 pmBUR - ORD
1 stop8h 44mSpirit Airlines
Tue 4/18:00 amORD - BUR
1 stop11h 18mSpirit Airlines
Deal found 2/19![Spirit Airlines logo]()
$105
This CheapOair deal was found by Cheapflights users on 2/19. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/105:52 pmOAK - ORD
1 stop10h 50mSpirit Airlines
Wed 3/1210:49 amORD - OAK
1 stop8h 08mSpirit Airlines
Deal found 2/19![Spirit Airlines logo]()
$118
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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.
Sat 3/224:36 pmBUR - ORD
1 stop6h 21mFrontier
Wed 3/266:45 amORD - BUR
1 stop6h 48mFrontier
Deal found 2/20![Frontier logo]()
$123
This Kiwi.com deal was found by Cheapflights users on 2/20. 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.
Mon 4/212:35 pmLAX - MDW
1 stop7h 46mFrontier
Tue 4/2212:19 pmMDW - LAX
1 stop6h 14mFrontier
Deal found 2/20![Frontier logo]()
$132
This eDestinos deal was found by Cheapflights users on 2/20. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/225:35 amLAX - ORD
1 stop6h 46mSpirit Airlines
Wed 3/268:09 amORD - LAX
1 stop8h 39mSpirit Airlines
Deal found 2/20![Spirit Airlines logo]()
$132
This Frontier deal was found by Cheapflights users on 2/20. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/44:08 pmLAX - ORD
1 stop13h 37mFrontier
Thu 5/296:10 amORD - LAX
Nonstop4h 33mFrontier
Deal found 2/20![Frontier logo]()
$134
This FlightHub deal was found by Cheapflights users on 2/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/158:09 pmLAX - ORD
1 stop6h 55mMultiple Airlines
Wed 3/197:51 pmORD - LAX
Nonstop4h 56mMultiple Airlines
Deal found 2/20![Multiple Airlines logo]()
$135
This Booking.com deal was found by Cheapflights users on 2/19. 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.
Fri 3/712:59 amONT - ORD
1 stop10h 21mFrontier
Tue 3/116:45 amORD - ONT
1 stop19h 19mFrontier
Deal found 2/19![Frontier logo]()
$135
This FlightHub deal was found by Cheapflights users on 2/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/85:34 pmBUR - ORD
1 stop9h 52mMultiple Airlines
Wed 3/126:45 amORD - BUR
1 stop6h 48mMultiple Airlines
Deal found 2/19![Multiple Airlines logo]()
$144
This Frontier deal was found by Cheapflights users on 2/19. 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.
Wed 4/1610:10 amSAN - ORD
1 stop12h 53mFrontier
Sun 4/206:45 amORD - SAN
1 stop6h 44mFrontier
Deal found 2/19![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 2/18. 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.
Thu 4/37:39 pmSAN - ORD
1 stop27h 03mMultiple Airlines
Sat 4/52:34 pmORD - SAN
1 stop11h 17mMultiple Airlines
Deal found 2/18![Multiple Airlines logo]()
$145
This Mytrip deal was found by Cheapflights users on 2/18. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/13:29 pmSAN - ORD
2 stops20h 10mSpirit Airlines
Sat 4/52:34 pmORD - SAN
1 stop11h 17mSpirit Airlines
Deal found 2/18![Spirit Airlines logo]()
$146
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 February 20, 2025.
Fly from
California
Fly to
Illinois
Route
Depart
Return
Price
BurbankChicago
BUR - ORD
BURORD
Burbank Bob Hope
Tue 3/25
7:58 pm-6:42 am
1 stop8h 44m
Chicago O'Hare Intl
Tue 4/1
8:00 am-5:18 pm
1 stop11h 18m
$105
BurbankChicago
BUR - ORD
BURORD
Burbank Bob Hope
Mon 3/24
12:33 pm-12:44 am
1 stop10h 11m
Chicago O'Hare Intl
Wed 3/26
6:45 am-11:33 am
1 stop6h 48m
$110
OaklandChicago
OAK - ORD
OAKORD
Oakland
Mon 4/7
6:55 pm-6:42 am
1 stop9h 47m
Chicago O'Hare Intl
Wed 4/9
7:41 am-5:34 pm
1 stop11h 53m
$118
BurbankChicago
BUR - ORD
BURORD
Burbank Bob Hope
Thu 3/13
5:34 pm-6:42 am
1 stop11h 08m
Chicago O'Hare Intl
Wed 3/19
6:45 am-11:33 am
1 stop6h 48m
$125
Los AngelesChicago
LAX - MDW
LAXMDW
Los Angeles
Mon 4/21
2:35 pm-12:21 am
1 stop7h 46m
Chicago Midway
Tue 4/22
12:19 pm-4:33 pm
1 stop6h 14m
$132
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Sat 3/22
5:35 am-2:21 pm
1 stop6h 46m
Chicago O'Hare Intl
Wed 3/26
8:09 am-2:48 pm
1 stop8h 39m
$132
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Sun 5/4
4:08 pm-7:45 am
1 stop13h 37m
Chicago O'Hare Intl
Thu 5/29
6:10 am-8:43 am
Nonstop4h 33m
$134
OntarioChicago
ONT - ORD
ONTORD
Ontario
Fri 3/7
12:59 am-1:20 pm
1 stop10h 21m
Chicago O'Hare Intl
Tue 3/11
6:45 am-12:04 am
1 stop19h 19m
$135
Los AngelesChicago
LAX - ORD
LAXORD
Los Angeles
Tue 3/4
11:18 pm-8:21 am
1 stop7h 03m
Chicago O'Hare Intl
Thu 3/13
6:25 am-1:03 pm
1 stop8h 38m
$139
San DiegoChicago
SAN - ORD
SANORD
San Diego
Wed 4/16
10:10 am-1:03 am
1 stop12h 53m
Chicago O'Hare Intl
Sun 4/20
6:45 am-11:29 am
1 stop6h 44m
$144
Showing 1-10 of 60 results
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 $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 February 20, 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 February 20, 2025.
The most flights from USCA to USIL are scheduled on a Thursday (94 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (72 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 February 20, 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.
Entertainment
7.6
Overall
8.1
Food
7.1
Crew
8.7
Boarding
8.2
Comfort
8.1
Reviews
1 / 20
10.0
ExcellentArlene,May 2024
SAN - OAK
Entertainment
7.6
Overall
8.1
Food
7.1
Crew
8.7
Boarding
8.2
Comfort
8.1
Reviews
1 / 20
10.0
ExcellentArlene,May 2024
SAN - OAK
Entertainment
7.6
Overall
8.1
Food
7.1
Crew
8.7
Boarding
8.2
Comfort
8.1
Reviews
1 / 20
10.0
ExcellentArlene,May 2024
SAN - OAK
Entertainment
7.6
Overall
8.1
Food
7.1
Crew
8.7
Boarding
8.2
Comfort
8.1
Reviews
1 / 20
10.0
ExcellentArlene,May 2024
SAN - OAK
Entertainment
7.6
Overall
8.1
Food
7.1
Crew
8.7
Boarding
8.2
Comfort
8.1
Reviews
1 / 20
10.0
ExcellentArlene,May 2024
SAN - OAK
Entertainment
7.6
Overall
8.1
Food
7.1
Crew
8.7
Boarding
8.2
Comfort
8.1
Reviews
1 / 20
10.0
ExcellentArlene,May 2024
SAN - OAK
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.
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.
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 February 20, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$49 | Average$120 | FlexibilityNo cancel fee | On-time88% | |
| Cheapest$74 | Average$232 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$74 | Average$218 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$100 | Average$409 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$149 | Average$362 | FlexibilityNo cancel fee | On-time83% | |
| Cheapest$157 | Average$440 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$179 | Average$487 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$182 | Average$490 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$182 | Average$458 | FlexibilityNo cancel fee | On-timeN/A |