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Orange County

$65+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SNA
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
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 November 4, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$134
(CheapOair)

One-way from

$65
(Priceline)

Popular in

December

Cheapest in

September

Average price

$290
Provider with most accurate pricing for Chicago (CHI)-Los Angeles flight deals.
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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 November 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 November 4, 2025.

This CheapOair deal was found by Cheapflights users on 11/2. 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 12/81:16 pmSTL - SNA
1 stop6h 23mFrontier
Sun 12/146:34 pmSNA - STL
1 stop15h 38mFrontier
Deal found 11/2$134
This CheapOair deal was found by Cheapflights users on 11/4. 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 12/41:16 pmSTL - SNA
1 stop6h 23mFrontier
Sun 12/76:34 pmSNA - STL
1 stop15h 38mFrontier
Deal found 11/4$138
This CheapOair deal was found by Cheapflights users on 11/3. 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 12/107:43 pmSTL - SNA
1 stop18h 59mFrontier
Sun 12/146:34 pmSNA - STL
1 stop15h 38mFrontier
Deal found 11/3$142
This CheapOair deal was found by Cheapflights users on 11/3. 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 11/197:45 pmSTL - SNA
1 stop17h 34mFrontier
Sun 11/2312:04 pmSNA - STL
1 stop19h 58mFrontier
Deal found 11/3$145
This CheapOair deal was found by Cheapflights users on 11/3. 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 11/117:45 pmSTL - SNA
1 stop19h 45mFrontier
Thu 12/116:34 pmSNA - STL
1 stop25h 14mFrontier
Deal found 11/3$176
This CheapOair deal was found by Cheapflights users on 11/2. 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 11/137:45 pmSTL - SNA
1 stop17h 31mFrontier
Sun 11/168:16 pmSNA - STL
1 stop15h 41mFrontier
Deal found 11/2$184
This CheapOair deal was found by Cheapflights users on 11/3. 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 11/197:45 pmSTL - SNA
1 stop17h 34mFrontier
Wed 11/2610:58 amSNA - STL
1 stop8h 11mFrontier
Deal found 11/3$199
This Kiwi.com deal was found by Cheapflights users on 11/4. 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 12/23:30 pmSTL - SNA
2 stops27h 21mMultiple Airlines
Fri 12/51:35 pmSNA - STL
1 stop18h 39mMultiple Airlines
Deal found 11/4$203
This CheapOair deal was found by Cheapflights users on 11/2. 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.
Sat 11/87:45 pmSTL - SNA
1 stop17h 55mFrontier
Tue 11/183:01 pmSNA - STL
1 stop16h 06mFrontier
Deal found 11/2$206
This CheapOair deal was found by Cheapflights users on 11/3. 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.
Fri 11/142:42 pmSTL - SNA
1 stop6h 06mFrontier
Tue 11/183:01 pmSNA - STL
1 stop16h 06mFrontier
Deal found 11/3$211
This CheapOair deal was found by Cheapflights users on 11/2. 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 11/102:42 pmSTL - SNA
1 stop6h 06mFrontier
Thu 11/138:16 pmSNA - STL
1 stop15h 41mFrontier
Deal found 11/2$222
This American Airlines deal was found by Cheapflights users on 11/3. 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.
Thu 12/48:14 amORD - SNA
Nonstop4h 37mAmerican Airlines
Mon 12/83:04 pmSNA - ORD
Nonstop4h 20mAmerican Airlines
Deal found 11/3$269

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 November 4, 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

Wed 11/19

7:45 pm-11:19 am

1 stop17h 34m

Santa Ana J. Wayne/Orange Cnty

Sun 11/23

12:04 pm-10:02 am

1 stop19h 58m

$183

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Tue 12/2

3:30 pm-4:51 pm

2 stops27h 21m

Santa Ana J. Wayne/Orange Cnty

Fri 12/5

1:35 pm-10:14 am

1 stop18h 39m

$203

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Thu 1/29

5:44 pm-6:01 pm

1 stop26h 17m

Santa Ana J. Wayne/Orange Cnty

Sun 2/1

10:38 am-7:41 pm

1 stop7h 03m

$214

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Mon 12/1

9:54 pm-4:51 pm

1 stop20h 57m

Santa Ana J. Wayne/Orange Cnty

Thu 12/4

6:34 pm-8:59 am

2 stops12h 25m

$251

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Thu 11/13

7:45 pm-11:16 am

1 stop17h 31m

Santa Ana J. Wayne/Orange Cnty

Mon 11/17

12:01 pm-9:07 am

1 stop19h 06m

$252

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Tue 11/11

7:45 pm-1:30 pm

1 stop19h 45m

Santa Ana J. Wayne/Orange Cnty

Fri 11/14

12:01 pm-9:07 am

1 stop19h 06m

$257

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Thu 11/13

2:42 pm-7:31 pm

1 stop6h 49m

Santa Ana J. Wayne/Orange Cnty

Sun 11/16

8:16 pm-1:57 pm

1 stop15h 41m

$257

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Wed 2/11

7:48 pm-10:24 pm

Nonstop4h 36m

Santa Ana J. Wayne/Orange Cnty

Thu 2/19

2:22 pm-8:25 pm

Nonstop4h 03m

$269

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Wed 11/19

6:05 pm-11:19 am

1 stop19h 14m

Santa Ana J. Wayne/Orange Cnty

Fri 11/21

12:04 pm-12:10 am

1 stop10h 06m

$272

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Fri 12/5

7:50 pm-10:28 pm

Nonstop4h 38m

Santa Ana J. Wayne/Orange Cnty

Mon 12/8

12:15 pm-9:16 pm

1 stop7h 01m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/3

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 November 4, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 47% 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 1, 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 November 4, 2025.

The most flights from USIL to zzKFI are scheduled on a Monday (20 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 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 ($69), Alaska Airlines ($144), and Southwest ($145).

  • 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 November 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$99Average$203FlexibilityNo cancel feeOn-time65%
FrontierCheapest$109Average$179FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$234Average$473FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$272Average$426FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$288Average$435FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$336Average$459FlexibilityNo cancel feeOn-time75%

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