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Orange County

$72+ 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 11/14. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SNA
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheap 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 September 16, 2025.

Round-trip from

$189
(Kiwi.com)

One-way from

$72
(Cheapflightsfares)

Popular in

December

Cheapest in

January

Average price

$250
From Illinois to Orange County
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One-way flight from Illinois to Orange County
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Highest demand for flights based on searches. 9% potential increase in price ($28 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 16, 2025.

This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:55 pmSTL - SNA
1 stop17h 12mFrontier
Fri 9/2611:52 amSNA - STL
1 stop19h 14mFrontier
Deal found 9/16$188
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Sat 11/157:45 pmSTL - SNA
1 stop17h 31mFrontier
Tue 11/182:20 pmSNA - STL
1 stop16h 47mFrontier
Deal found 9/14$189
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 11/197:45 pmSTL - SNA
1 stop17h 34mMultiple Airlines
Wed 12/35:46 pmSNA - STL
1 stop21h 03mMultiple Airlines
Deal found 9/14$193
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Fri 10/319:07 pmSTL - SNA
1 stop24h 07mMultiple Airlines
Mon 11/312:01 pmSNA - STL
1 stop19h 06mMultiple Airlines
Deal found 9/14$197
This Kiwi.com deal was found by Cheapflights users on 9/14. 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 10/1312:38 pmSTL - SNA
1 stop8h 36mMultiple Airlines
Wed 10/158:09 pmSNA - STL
2 stops10h 58mMultiple Airlines
Deal found 9/14$200
This Booking.com deal was found by Cheapflights users on 9/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/237:55 pmSTL - SNA
1 stop18h 08mFrontier
Thu 9/257:16 pmSNA - STL
1 stop16h 37mFrontier
Deal found 9/16$213
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Fri 10/107:52 pmSTL - SNA
1 stop19h 43mMultiple Airlines
Fri 10/178:09 pmSNA - STL
1 stop17h 47mMultiple Airlines
Deal found 9/15$232
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Fri 10/107:52 pmSTL - SNA
1 stop19h 43mFrontier
Fri 10/172:35 pmSNA - STL
2 stops16h 32mFrontier
Deal found 9/15$233
This Kiwi.com deal was found by Cheapflights users on 9/15. 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.
Fri 11/77:45 pmSTL - SNA
1 stop19h 50mFrontier
Sun 11/98:16 pmSNA - STL
2 stops10h 51mFrontier
Deal found 9/15$239
This Kiwi.com deal was found by Cheapflights users on 9/14. 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.
Fri 11/147:45 pmSTL - SNA
1 stop19h 50mFrontier
Sun 11/168:16 pmSNA - STL
2 stops10h 51mFrontier
Deal found 9/14$240
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/317:35 pmORD - SNA
Nonstop4h 38mUnited Airlines
Mon 11/32:07 pmSNA - ORD
Nonstop4h 05mUnited Airlines
Deal found 9/15$269
This CheapOair deal was found by Cheapflights users on 9/14. 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 11/137:35 amORD - SNA
2 stops15h 24mSpirit Airlines
Mon 11/175:46 pmSNA - ORD
2 stops13h 58mSpirit Airlines
Deal found 9/14$270

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 September 16, 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

Sat 11/15

7:45 pm-11:16 am

1 stop17h 31m

Santa Ana J. Wayne/Orange Cnty

Tue 11/18

2:20 pm-9:07 am

1 stop16h 47m

$189

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Fri 10/31

9:07 pm-7:14 pm

1 stop24h 07m

Santa Ana J. Wayne/Orange Cnty

Mon 11/3

12:01 pm-9:07 am

1 stop19h 06m

$197

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Mon 10/13

12:38 pm-7:14 pm

1 stop8h 36m

Santa Ana J. Wayne/Orange Cnty

Wed 10/15

8:09 pm-9:07 am

2 stops10h 58m

$200

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Wed 11/19

7:45 pm-4:51 pm

2 stops23h 06m

Santa Ana J. Wayne/Orange Cnty

Wed 12/3

5:46 pm-4:49 pm

1 stop21h 03m

$201

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Fri 10/10

7:52 pm-1:35 pm

1 stop19h 43m

Santa Ana J. Wayne/Orange Cnty

Fri 10/17

2:35 pm-9:07 am

2 stops16h 32m

$233

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Thu 10/9

5:01 am-9:17 am

1 stop6h 16m

Santa Ana J. Wayne/Orange Cnty

Sat 10/11

1:48 pm-7:59 pm

Nonstop4h 11m

$275

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Sat 10/11

5:01 am-9:17 am

1 stop6h 16m

Santa Ana J. Wayne/Orange Cnty

Sat 10/18

1:48 pm-7:59 pm

Nonstop4h 11m

$275

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Fri 10/24

5:01 am-9:17 am

1 stop6h 16m

Santa Ana J. Wayne/Orange Cnty

Mon 10/27

2:07 pm-8:12 pm

Nonstop4h 05m

$275

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Fri 10/17

5:01 am-9:17 am

1 stop6h 16m

Santa Ana J. Wayne/Orange Cnty

Sat 10/25

1:48 pm-7:59 pm

Nonstop4h 11m

$275

ChicagoSanta Ana

MDW - SNA

MDWSNA

Chicago Midway

Tue 12/16

5:15 am-11:30 am

1 stop8h 15m

Santa Ana J. Wayne/Orange Cnty

Tue 1/13

6:40 pm-5:05 am

1 stop8h 25m

$277

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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, January is the cheapest month in which you can book a flight from Illinois to Orange County (average of $298). Flying from Illinois to Orange County in March is currently the most expensive (average of $375). 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 September 16, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Orange County as you normally would.

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 September 16, 2025.

The most flights from USIL to zzKFI are scheduled on a Monday (23 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (15 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 6h 16m. 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 ($111), and Alaska Airlines ($124).

  • 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, January is the cheapest month in which you can book a flight from Illinois to Orange County (average of $298). Flying from Illinois to Orange County in March is currently the most expensive (average of $375). 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$99Average$202FlexibilityNo cancel feeOn-time65%
FrontierCheapest$109Average$201FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$234Average$477FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$279Average$430FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$288Average$440FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$336Average$476FlexibilityNo cancel feeOn-time75%

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