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Orange County

$66+ 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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — SNA
Feb 4 — Feb 111
Tue 2/4
Tue 2/11
1 adult, Economy
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Cheap flight deals from Illinois to Orange County

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) to Orange County (zzKFI). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 30, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$135
(CheapOair)

One-way from

$66
(CheapOair)

Popular in

March

Cheapest in

September

Average price

$271
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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. 5% potential increase in price ($16 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 January 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 January 30, 2025.

This CheapOair deal was found by Cheapflights users on 1/30. 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 2/2711:08 pmSTL - SNA
1 stop19h 41mFrontier
Thu 3/612:20 pmSNA - STL
1 stop18h 56mFrontier
Deal found 1/30$135
This CheapOair deal was found by Cheapflights users on 1/30. 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 3/1010:49 amORD - SNA
1 stop25h 08mSpirit Airlines
Sat 3/156:45 amSNA - ORD
1 stop21h 57mSpirit Airlines
Deal found 1/30$266
This Frontier deal was found by Cheapflights users on 1/30. 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.
Thu 3/206:40 amMDW - SNA
1 stop6h 50mFrontier
Wed 3/2612:34 pmSNA - MDW
1 stop9h 43mFrontier
Deal found 1/30$266
This Frontier deal was found by Cheapflights users on 1/29. 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 3/266:45 amORD - SNA
1 stop6h 59mFrontier
Tue 4/112:25 pmSNA - ORD
1 stop9h 50mFrontier
Deal found 1/29$270
This FlightHub deal was found by Cheapflights users on 1/29. 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.
Mon 2/1010:47 pmORD - SNA
1 stop17h 18mMultiple Airlines
Wed 2/1912:30 pmSNA - ORD
1 stop22h 55mMultiple Airlines
Deal found 1/29$272
This American Airlines deal was found by Cheapflights users on 1/29. 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.
Wed 4/2311:03 amPIA - SNA
1 stop6h 58mAmerican Airlines
Sat 4/2610:25 amSNA - PIA
1 stop8h 53mAmerican Airlines
Deal found 1/29$284
This Southwest deal was found by Cheapflights users on 1/30. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/228:35 amMDW - LGB
Nonstop4h 25mSouthwest
Wed 4/233:25 pmLGB - MDW
1 stop5h 30mSouthwest
Deal found 1/30$287
This United Airlines deal was found by Cheapflights users on 1/30. 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.
Sat 3/83:50 pmORD - SNA
Nonstop4h 43mUnited Airlines
Tue 3/117:00 amSNA - ORD
Nonstop4h 07mUnited Airlines
Deal found 1/30$293
This Delta deal was found by Cheapflights users on 1/29. 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.
Tue 2/257:20 amORD - LGB
1 stop7h 02mDelta
Mon 3/107:10 amLGB - ORD
1 stop8h 36mDelta
Deal found 1/29$297
This American Airlines deal was found by Cheapflights users on 1/29. 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.
Sat 2/157:31 pmORD - SNA
Nonstop4h 43mAmerican Airlines
Fri 2/2111:17 amSNA - ORD
1 stop6h 01mAmerican Airlines
Deal found 1/29$302
This Delta deal was found by Cheapflights users on 1/29. 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.
Thu 4/36:15 amORD - SNA
1 stop7h 52mDelta
Wed 4/910:00 amSNA - ORD
1 stop5h 50mDelta
Deal found 1/29$310
This Delta deal was found by Cheapflights users on 1/29. 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.
Tue 3/251:16 pmMDW - SNA
1 stop8h 56mDelta
Mon 3/319:30 pmSNA - MDW
1 stop9h 39mDelta
Deal found 1/29$310

Find flights from Illinois to Orange County within your budget

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 January 30, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

St. LouisSanta Ana

STL - SNA

STLSNA

Lambert-St Louis

Thu 2/27

11:08 pm-4:49 pm

1 stop19h 41m

Santa Ana J. Wayne/Orange Cnty

Thu 3/6

12:20 pm-9:16 am

1 stop18h 56m

$135

MolineSanta Ana

MLI - SNA

MLISNA

Moline Quad-City

Tue 2/25

6:00 am-10:52 am

1 stop6h 52m

Santa Ana J. Wayne/Orange Cnty

Wed 3/5

1:37 pm-9:56 pm

1 stop6h 19m

$229

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Mon 3/10

10:49 am-9:57 am

1 stop25h 08m

Santa Ana J. Wayne/Orange Cnty

Sat 3/15

6:45 am-6:42 am

1 stop21h 57m

$266

ChicagoSanta Ana

MDW - SNA

MDWSNA

Chicago Midway

Thu 2/13

6:40 am-11:30 am

1 stop6h 50m

Santa Ana J. Wayne/Orange Cnty

Tue 2/18

12:30 pm-12:17 am

1 stop9h 47m

$266

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Mon 2/10

10:47 pm-2:05 pm

1 stop17h 18m

Santa Ana J. Wayne/Orange Cnty

Wed 2/19

12:30 pm-1:25 pm

1 stop22h 55m

$272

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Sun 2/23

6:50 am-11:30 am

1 stop6h 40m

Santa Ana J. Wayne/Orange Cnty

Fri 3/7

3:52 pm-5:14 am

1 stop11h 22m

$278

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Fri 2/21

7:00 pm-12:31 pm

1 stop19h 31m

Santa Ana J. Wayne/Orange Cnty

Tue 2/25

5:24 pm-4:58 pm

1 stop21h 34m

$282

PeoriaSanta Ana

PIA - SNA

PIASNA

Greater Peoria

Wed 4/23

11:03 am-4:01 pm

1 stop6h 58m

Santa Ana J. Wayne/Orange Cnty

Sat 4/26

10:25 am-9:18 pm

1 stop8h 53m

$284

ChicagoLong Beach

MDW - LGB

MDWLGB

Chicago Midway

Tue 4/22

8:35 am-11:00 am

Nonstop4h 25m

Long Beach Municipal

Wed 4/23

3:25 pm-10:55 pm

1 stop5h 30m

$287

ChicagoSanta Ana

ORD - SNA

ORDSNA

Chicago O'Hare Intl

Wed 2/26

7:00 pm-9:42 pm

Nonstop4h 42m

Santa Ana J. Wayne/Orange Cnty

Sat 3/8

1:34 pm-7:36 pm

Nonstop4h 02m

$293

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/30

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.

Travel insights for flights from Illinois to Orange County

Get recent, data-driven insights about flights from Illinois to Orange County including ideal travel times, pricing trends, and more.

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 June is currently the most expensive (average of $418). 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 January 30, 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 January 30, 2025.

The most flights from USIL to zzKFI are scheduled on a Monday (18 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (9 on average).

Rainfall in Orange County by month

Plan your trip to Orange County by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Orange County ranges from 0.0 - 3.1 inches per month. February is typically the wettest month, when rainfall can reach 3.1 in. July is typically the driest time to visit Orange County when rainfall is around 0.0 in.

Temperature in Orange County by month

Plan your trip to Orange County by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Orange County, use this chart to help with planning. For those seeking warmer temperatures, August 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 55.4 F).

Reviews of airlines servicing Orange County

Get insights into the airlines that provide service to Orange County. 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 Orange County. Reviews last updated January 30, 2025.
To help decide which airline to fly from Illinois to Orange County, see what other customers have to say about Southwest, Alaska Airlines and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Southwest
8.1
Very good
4,585 reviews
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Alaska Airlines
8.0
Very good
9,688 reviews
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Delta
8.0
Very good
8,454 reviews
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

United Airlines
7.4
Good
8,913 reviews
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

Allegiant Air
7.3
Good
790 reviews
Southwest
8.1
Very good
4,585 reviews

Entertainment

7.7

Food

7.1

Comfort

8.1

Crew

8.7

Overall

8.1

Boarding

8.2

Reviews

1 / 20

2.0
Mediocre

Bhoopal,Nov 2024

STL - BOS

Flight was delayed by one hour and 40 minutes. Also baggage was delivered late at Boston. This delay made me miss my connection from Boston to Hyderabad

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.

  • 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 ($66), Spirit Airlines ($98), and American Airlines ($115).

  • 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 June is currently the most expensive (average of $418). 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

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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 January 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$108Average$229FlexibilityNo cancel feeOn-time65%
FrontierCheapest$109Average$214FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$238Average$502FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$279Average$485FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$328Average$569FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$426Average$460FlexibilityNo cancel feeOn-time63%
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