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Orange County

$98+ Cheap flights from Illinois to Orange County

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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SNA
ene. 20 — ene. 271
mar. 1/20
mar. 1/27
1 adult, Economy
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Cheap flight deals from Illinois to Orange County

Cheapest flights from Illinois to Orange County
Explore the most affordable flight options available from Illinois to Orange County. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 21, 2025.

This Delta deal was found by Cheapflights users on 12/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/252:15 pmORD - SNA
1 stop10h 06mDelta
jue. 1/81:35 pmSNA - ORD
1 stop6h 17mDelta
Deal found 12/20$325
This United Airlines deal was found by Cheapflights users on 12/20. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/257:54 pmORD - SNA
Nonstop4h 36mUnited Airlines
jue. 1/82:16 pmSNA - ORD
Nonstop4h 09mUnited Airlines
Deal found 12/20$340
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/243:00 pmORD - SNA
1 stop9h 04mDelta
sáb. 12/272:15 pmSNA - ORD
1 stop7h 47mDelta
Deal found 12/18$348
This Delta deal was found by Cheapflights users on 12/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/242:15 pmORD - SNA
1 stop10h 06mDelta
mar. 12/307:00 amSNA - ORD
1 stop9h 00mDelta
Deal found 12/19$375
This American Airlines deal was found by Cheapflights users on 12/21. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/235:25 pmORD - SNA
1 stop6h 23mAmerican Airlines
mar. 1/61:24 pmSNA - ORD
1 stop5h 43mAmerican Airlines
Deal found 12/21$382
This Delta deal was found by Cheapflights users on 12/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/242:15 pmORD - SNA
1 stop10h 06mDelta
lun. 12/2912:05 pmSNA - ORD
1 stop7h 09mDelta
Deal found 12/19$384
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.
mié. 12/247:43 pmSTL - SNA
1 stop18h 52mFrontier
dom. 12/287:57 pmSNA - STL
1 stop23h 28mFrontier
Deal found 12/18$388
This Delta deal was found by Cheapflights users on 12/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/202:15 pmORD - SNA
1 stop10h 06mDelta
mar. 12/232:15 pmSNA - ORD
1 stop7h 47mDelta
Deal found 12/19$405
This American Airlines deal was found by Cheapflights users on 12/19. 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.
mar. 12/2311:45 amORD - SNA
Nonstop4h 29mAmerican Airlines
mar. 12/303:04 pmSNA - ORD
Nonstop4h 21mAmerican Airlines
Deal found 12/19$406
This Delta deal was found by Cheapflights users on 12/20. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/234:13 pmORD - SNA
1 stop8h 03mDelta
lun. 1/59:20 pmSNA - ORD
1 stop9h 23mDelta
Deal found 12/20$409
This Kiwi.com deal was found by Cheapflights users on 12/20. 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.
mié. 12/315:19 pmSTL - SNA
1 stop18h 57mMultiple Airlines
vie. 1/27:16 pmSNA - STL
2 stops12h 46mMultiple Airlines
Deal found 12/20$415
This American Airlines deal was found by Cheapflights users on 12/19. 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.
lun. 12/226:20 amMLI - SNA
1 stop7h 32mAmerican Airlines
lun. 1/52:47 pmSNA - MLI
1 stop6h 04mAmerican Airlines
Deal found 12/19$439

Find flight deals from Illinois to Orange County

Keep the following information in mind while searching for Illinois to Orange County flight deals. Data was last updated diciembre 21, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$145
(Trip.com)

One-way from

$98
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$374
Provider with most accurate pricing for Chicago (CHI)-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Chicago (CHI)-Los Angeles flights.
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From Illinois to Orange County
Search Deals
One-way flight from Illinois to Orange County
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Orange County 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 diciembre 21, 2025.
Use the filters below to find and compare flights from Illinois to Orange County that are best for you.

Fly from

Illinois

Fly to

Orange County

Route

Depart

Return

Price

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

dom. 3/1

10:11 pm-8:13 am

1 stop12h 02m

Santa Ana J. Wayne/Orange Cnty

jue. 3/5

8:58 am-11:19 am

1 stop24h 21m

$237

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

sáb. 1/17

7:00 am-6:17 pm

2 stops13h 17m

Santa Ana J. Wayne/Orange Cnty

sáb. 1/24

7:30 am-9:38 pm

2 stops12h 08m

$256

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

vie. 3/6

2:22 pm-10:18 pm

2 stops9h 56m

Santa Ana J. Wayne/Orange Cnty

vie. 3/13

7:30 am-12:21 am

2 stops14h 51m

$256

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

lun. 1/19

7:48 pm-10:24 pm

Nonstop4h 36m

Santa Ana J. Wayne/Orange Cnty

lun. 1/26

2:16 pm-8:25 pm

Nonstop4h 09m

$269

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

vie. 1/23

4:05 pm-6:41 pm

Nonstop4h 36m

Santa Ana J. Wayne/Orange Cnty

vie. 1/30

2:16 pm-8:25 pm

Nonstop4h 09m

$269

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

mié. 1/28

7:48 pm-10:24 pm

Nonstop4h 36m

Santa Ana J. Wayne/Orange Cnty

lun. 2/2

2:16 pm-8:25 pm

Nonstop4h 09m

$269

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

sáb. 2/21

2:00 pm-9:45 pm

1 stop9h 45m

Santa Ana J. Wayne/Orange Cnty

lun. 2/23

6:45 am-12:55 pm

Nonstop4h 10m

$279

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

mar. 1/13

12:53 pm-5:28 pm

1 stop6h 35m

Santa Ana J. Wayne/Orange Cnty

sáb. 1/17

10:51 am-5:00 pm

Nonstop4h 09m

$279

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

jue. 2/19

7:44 pm-10:30 pm

Nonstop4h 46m

Santa Ana J. Wayne/Orange Cnty

lun. 2/23

3:25 pm-12:26 am

1 stop7h 01m

$279

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

jue. 2/26

6:25 am-12:18 pm

1 stop7h 53m

Santa Ana J. Wayne/Orange Cnty

jue. 3/12

2:22 pm-8:25 pm

Nonstop4h 03m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/20

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Orange County

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

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

Currently, March is the cheapest month in which you can book a flight from Illinois to Orange County (average of $130). Flying from Illinois to Orange County in May is currently the most expensive (average of $269). 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 IL to KFI?

Find hourly flight availability from Illinois to Orange County. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 21, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 50% on flights from Illinois to Orange County by exploring options for tickets in the evening.

What is the cheapest day to fly from Illinois to Orange County?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Orange County. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Orange County flight should consider departing on Saturday evenings when fares are most often at their lowest. Tuesday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Illinois to Orange County

Explore weekly flight availability from Illinois to Orange County. 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 diciembre 21, 2025.

The most flights from USIL to zzKFI are scheduled on a Friday (20 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (8 on average).

Related info for your journey

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

  • How long is the flight from Illinois to Orange County?

    Departing from Illinois to Orange County will take you 4h 36m. The distance from Illinois to Orange County is about 1721 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    The cheapest airlines for a one-way flight from Illinois to Orange County are Frontier ($72), Spirit Airlines ($85), and American Airlines ($114).

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

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

  • How can I find direct flights from Illinois to Orange County?

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

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

    Yes. Cheapflights offers flight deals from Illinois to Orange County 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 Illinois to Orange County?

    Currently, March is the cheapest month in which you can book a flight from Illinois to Orange County (average of $130). Flying from Illinois to Orange County in May is currently the most expensive (average of $269). 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 Illinois to Orange County

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Illinois to Orange County

Discover the top 6 airlines that operate flights from Illinois to Orange County. 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 diciembre 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$85Average$174FlexibilityNo cancel feeOn-time65%
FrontierCheapest$110Average$202FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$234Average$465FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$269Average$409FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$288Average$433FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$336Average$459FlexibilityNo cancel feeOn-time75%

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