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$78+ Cheap flights from Orange County to Illinois

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 2/27. Fares are subject to change and may not be available on all flights or dates of travel.
SNA — ORD
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Orange County to Illinois

Cheapest flights from Orange County to Illinois
Explore the most affordable flight options available from Orange County to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:16 pmSNA - ORD
1 stop16h 01mFrontier
Sun 1/118:49 pmORD - SNA
1 stop17h 57mFrontier
Deal found 12/16$269
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1910:30 amSNA - STL
1 stop7h 17mFrontier
Sun 1/410:10 pmSTL - SNA
1 stop23h 11mFrontier
Deal found 12/16$269
This CheapOair deal was found by Cheapflights users on 12/17. 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 12/298:16 pmSNA - STL
1 stop23h 09mFrontier
Thu 1/15:19 pmSTL - SNA
1 stop27h 03mFrontier
Deal found 12/17$275
This Expedia deal was found by Cheapflights users on 12/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/228:16 pmSNA - ORD
1 stop16h 01mFrontier
Thu 12/259:33 pmORD - SNA
1 stop12h 54mFrontier
Deal found 12/16$284
This CheapOair deal was found by Cheapflights users on 12/17. 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 12/228:16 pmSNA - ORD
1 stop16h 01mFrontier
Mon 1/57:00 amORD - SNA
1 stop6h 08mFrontier
Deal found 12/17$285
This Expedia deal was found by Cheapflights users on 12/15. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:30 amSNA - STL
1 stop7h 37mMultiple Airlines
Mon 1/57:00 amSTL - SNA
1 stop9h 03mMultiple Airlines
Deal found 12/15$302
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/298:16 pmSNA - ORD
1 stop16h 01mFrontier
Mon 1/57:00 amORD - SNA
1 stop6h 08mFrontier
Deal found 12/16$305
This CheapOair deal was found by Cheapflights users on 12/15. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1811:52 amSNA - STL
1 stop20h 10mFrontier
Thu 1/81:07 pmSTL - SNA
1 stop25h 39mFrontier
Deal found 12/15$305
This CheapOair deal was found by Cheapflights users on 12/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/287:57 pmSNA - STL
1 stop23h 28mFrontier
Thu 1/15:19 pmSTL - SNA
1 stop27h 03mFrontier
Deal found 12/16$309
This American Airlines deal was found by Cheapflights users on 12/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/307:35 pmSNA - ORD
1 stop7h 59mAmerican Airlines
Wed 1/78:15 amORD - SNA
Nonstop4h 34mAmerican Airlines
Deal found 12/16$314
This Kiwi.com deal was found by Cheapflights users on 12/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/316:45 amSNA - STL
2 stops24h 55mMultiple Airlines
Sun 1/410:10 pmSTL - SNA
1 stop23h 11mMultiple Airlines
Deal found 12/16$314
This Kiwi.com deal was found by Cheapflights users on 12/17. 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 12/316:45 amSNA - ORD
2 stops21h 20mMultiple Airlines
Sun 1/410:49 pmORD - SNA
1 stop13h 27mMultiple Airlines
Deal found 12/17$321

Find flight deals from Orange County to Illinois

Keep the following information in mind while searching for Orange County to Illinois flight deals. Data was last updated December 18, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$153
(Kiwi.com)

One-way from

$78
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$368
Provider with most accurate pricing for Los Angeles-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Chicago (CHI) flights.
Search Deals
From Orange County to Illinois
Search Deals
One-way flight from Orange County to Illinois
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($36 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 December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Orange County to Illinois 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 December 18, 2025.
Use the filters below to find and compare flights from Orange County to Illinois that are best for you.

Fly from

Orange County

Fly to

Illinois

Route

Depart

Return

Price

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Fri 2/6

6:45 am-8:48 pm

1 stop12h 03m

Lambert-St Louis

Sun 2/8

9:32 pm-6:01 pm

1 stop22h 29m

$154

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Thu 1/15

4:37 pm-12:40 pm

1 stop18h 03m

Lambert-St Louis

Sat 1/17

3:43 pm-10:43 am

1 stop21h 00m

$158

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Thu 1/22

6:45 am-9:06 pm

1 stop12h 21m

Lambert-St Louis

Thu 1/29

10:01 pm-12:25 pm

1 stop16h 24m

$161

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Fri 1/9

1:31 pm-9:21 pm

1 stop5h 50m

Lambert-St Louis

Mon 1/12

1:07 pm-7:18 pm

1 stop8h 11m

$217

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Fri 1/30

6:45 am-8:48 pm

1 stop12h 03m

Lambert-St Louis

Tue 2/3

5:42 pm-10:58 am

2 stops43h 16m

$219

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Fri 2/27

4:37 pm-1:56 pm

2 stops19h 19m

Lambert-St Louis

Sun 3/1

10:11 pm-8:13 am

1 stop12h 02m

$225

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Fri 1/30

6:45 am-6:44 pm

2 stops9h 59m

Lambert-St Louis

Fri 1/30

9:43 pm-12:25 pm

1 stop16h 42m

$228

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Sun 1/25

2:27 pm-12:50 pm

2 stops20h 23m

Lambert-St Louis

Wed 1/28

3:46 pm-10:58 am

1 stop21h 12m

$245

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Fri 1/9

12:17 pm-10:02 am

1 stop19h 45m

Lambert-St Louis

Sun 1/11

9:46 pm-12:46 pm

1 stop17h 00m

$253

Santa AnaChicago

SNA - ORD

SNAORD

Santa Ana J. Wayne/Orange Cnty

Thu 3/12

3:24 pm-9:35 pm

Nonstop4h 11m

Chicago O'Hare Intl

Mon 3/16

11:49 am-2:26 pm

Nonstop4h 37m

$269

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

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

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

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

Currently, February is the cheapest month in which you can book a flight from Orange County to Illinois (average of $147). Flying from Orange County to Illinois in March is currently the most expensive (average of $283). 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 KFI to IL?

Find hourly flight availability from Orange County to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

A simple way to save on the total cost of your ticket is to fly from Orange County to Illinois in the evening. If you’re flexible enough to do this you can expect to save up to 38% on your trip compared to booking a flight at noon.

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

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

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

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated December 18, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest, and United Airlines from Orange County to Illinois. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
11,478 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Alaska Airlines
8.0
Very good
11,478 reviews
Alaska Airlines
8.0
Very good
11,478 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Southwest
7.9
Good
4,250 reviews
Alaska Airlines
8.0
Very good
11,478 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
United Airlines
7.4
Good
9,093 reviews
Alaska Airlines
8.0
Very good
11,478 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
American Airlines
7.2
Good
11,055 reviews
Alaska Airlines
8.0
Very good
11,478 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.
Spirit Airlines
6.3
Okay
8,190 reviews
Alaska Airlines
8.0
Very good
11,478 reviews

Entertainment

7.0

Food

7.1

Crew

8.5

Boarding

8.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
2.0
Mediocre

Art,Dec 2025

SAN - OGG

It was a five hour flight and my seat did not recline. I have had three back surgeries and I’m solid bone for my L3 vertebrae all the way to my tailbone. My body has never hurt so much. There was no TV on this flight and only a small can of soda was free.

Related info for your journey

Find useful and relevant information for your journey from Orange County to Illinois. 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 Orange County to Illinois?

    Frontier, American Airlines, and United Airlines can get you from Orange County to Illinois in just under 4h 11m. Your travel time can differ by up to 2h 56m. The distance from Orange County to Illinois is about 1721 mi. This flight may include one or multiple stops.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $40. Spirit Airlines flights start at $67 while deals on Delta start at $128 one-way.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Orange County to Illinois (average of $147). Flying from Orange County to Illinois in March is currently the most expensive (average of $283). 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 Orange County to Illinois

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

Discover the top 6 airlines that operate flights from Orange County to Illinois. 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 December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$103Average$199FlexibilityNo cancel feeOn-time65%
FrontierCheapest$110Average$216FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$190Average$474FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$228Average$465FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$269Average$489FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$288Average$446FlexibilityNo cancel feeOn-time63%

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