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Orange County

$100+ 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 2/20. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SNA
Mar 5 — Mar 121
Thu 3/5
Thu 3/12
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 February 3, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/31. 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.
Sun 3/158:06 pm
STL
-
SNA
1 stop18h 21m
Frontier
Mon 3/239:40 am
SNA
-
STL
2 stops46h 09m
Frontier
Deal found 1/31$199
This Trip.com deal was found by Cheapflights users on 2/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/212:51 pm
STL
-
SNA
1 stop21h 46m
Multiple Airlines
Sat 2/286:45 am
SNA
-
STL
1 stop9h 01m
Multiple Airlines
Deal found 2/1$204
This Kiwi.com deal was found by Cheapflights users on 1/31. 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.
Sun 3/158:06 pm
STL
-
SNA
1 stop18h 21m
Multiple Airlines
Thu 3/192:53 pm
SNA
-
STL
1 stop18h 26m
Multiple Airlines
Deal found 1/31$212
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 2/142:51 pm
STL
-
SNA
2 stops23h 00m
Frontier
Thu 2/197:25 pm
SNA
-
STL
1 stop22h 42m
Frontier
Deal found 2/1$227
This Kiwi.com deal was found by Cheapflights users on 1/31. 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 3/168:12 pm
STL
-
SNA
2 stops39h 41m
Multiple Airlines
Mon 3/232:53 pm
SNA
-
STL
1 stop18h 26m
Multiple Airlines
Deal found 1/31$229
This Kiwi.com deal was found by Cheapflights users on 2/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/2312:14 pm
STL
-
SNA
1 stop10h 59m
Multiple Airlines
Sun 3/297:53 pm
SNA
-
STL
2 stops11h 56m
Multiple Airlines
Deal found 2/3$236
This Kiwi.com deal was found by Cheapflights users on 2/1. 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 2/142:51 pm
STL
-
SNA
2 stops23h 00m
Multiple Airlines
Wed 2/184:37 pm
SNA
-
STL
1 stop26h 49m
Multiple Airlines
Deal found 2/1$241
This CheapOair deal was found by Cheapflights users on 2/1. 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 5/78:12 pm
STL
-
SNA
1 stop16h 34m
Frontier
Sun 5/1011:32 am
SNA
-
STL
1 stop5h 40m
Frontier
Deal found 2/1$245
This CheapOair deal was found by Cheapflights users on 2/3. 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.
Thu 3/1910:47 pm
STL
-
SNA
1 stop12h 03m
Frontier
Mon 3/301:12 pm
SNA
-
STL
1 stop20h 07m
Frontier
Deal found 2/3$249
This CheapOair deal was found by Cheapflights users on 2/2. 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 4/168:12 pm
STL
-
SNA
1 stop16h 34m
Frontier
Sun 4/198:20 pm
SNA
-
STL
1 stop22h 40m
Frontier
Deal found 2/2$256
This United Airlines deal was found by Cheapflights users on 2/2. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/177:49 pm
ORD
-
SNA
Nonstop4h 41m
United Airlines
Mon 5/42:20 pm
SNA
-
ORD
Nonstop4h 06m
United Airlines
Deal found 2/2$269
This Kiwi.com deal was found by Cheapflights users on 2/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/2511:51 am
ORD
-
SNA
2 stops22h 22m
Multiple Airlines
Fri 2/276:45 am
SNA
-
ORD
1 stop8h 41m
Multiple Airlines
Deal found 2/2$270

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 February 3, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$199
(Kiwi.com)

One-way from

$100
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$301
Provider with most accurate pricing for Chicago (CHI)-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Los Angeles flights.
Search Deals
From Illinois to Orange County
Search Deals
One-way flight from Illinois to Orange County
Search Deals
Highest demand for flights based on searches. 16% potential increase in price ($54 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($8 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 3, 2026.
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

Sun 3/15

8:06 pm-12:27 pm

1 stop18h 21m

Santa Ana J. Wayne/Orange Cnty

Mon 3/23

2:53 pm-11:19 am

1 stop18h 26m

$212

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Mon 3/16

8:12 pm-9:53 am

2 stops39h 41m

Santa Ana J. Wayne/Orange Cnty

Mon 3/23

2:53 pm-11:19 am

1 stop18h 26m

$229

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Thu 3/19

10:47 pm-8:50 am

1 stop12h 03m

Santa Ana J. Wayne/Orange Cnty

Mon 3/30

1:12 pm-11:19 am

1 stop20h 07m

$249

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Sat 4/25

5:20 am-10:05 am

1 stop6h 45m

Santa Ana J. Wayne/Orange Cnty

Sat 5/2

3:12 pm-11:46 pm

1 stop6h 34m

$257

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Tue 3/31

8:54 am-1:18 pm

1 stop6h 24m

Santa Ana J. Wayne/Orange Cnty

Sat 4/18

12:15 pm-10:28 pm

1 stop8h 13m

$257

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Tue 4/14

7:45 am-3:03 pm

2 stops9h 18m

Santa Ana J. Wayne/Orange Cnty

Tue 4/21

11:10 am-8:54 pm

1 stop7h 44m

$262

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Tue 4/28

7:49 pm-10:30 pm

Nonstop4h 41m

Santa Ana J. Wayne/Orange Cnty

Sat 5/2

6:45 am-1:01 pm

Nonstop4h 16m

$269

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Tue 3/10

2:45 pm-9:03 pm

1 stop8h 18m

Santa Ana J. Wayne/Orange Cnty

Tue 3/17

2:22 pm-8:25 pm

Nonstop4h 03m

$279

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Fri 4/17

6:25 am-12:18 pm

1 stop7h 53m

Santa Ana J. Wayne/Orange Cnty

Mon 5/4

2:20 pm-8:26 pm

Nonstop4h 06m

$279

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Sat 3/7

2:45 pm-9:03 pm

1 stop8h 18m

Santa Ana J. Wayne/Orange Cnty

Tue 3/10

2:22 pm-8:25 pm

Nonstop4h 03m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/31

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 January 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 February 3, 2026.

Unlike at noon, when flights are generally more expensive, you can save up to 17% on flights from Illinois to Orange County by exploring options for tickets in the morning.

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 February 3, 2026.

The most flights from USIL to zzKFI are scheduled on a Monday (18 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (11 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 24m. The distance from Illinois to Orange County is about 1565 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 ($76), Spirit Airlines ($79), 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 January 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 February 3, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$60Average$165FlexibilityNo cancel feeOn-time65%
FrontierCheapest$85Average$212FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$234Average$461FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$269Average$401FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$288Average$409FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$336Average$440FlexibilityNo cancel feeOn-time75%

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