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$69+ 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 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
SNA — ORD
Dec 4 — Dec 111
Thu 12/4
Thu 12/11
1 adult, Economy
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Find 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 November 4, 2025.

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 11/183:01 pmSNA - STL
1 stop16h 06mFrontier
Thu 11/209:54 pmSTL - SNA
1 stop20h 05mFrontier
Deal found 11/3$130
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.
Thu 12/46:34 pmSNA - STL
1 stop15h 38mFrontier
Sun 12/79:14 pmSTL - SNA
1 stop22h 25mFrontier
Deal found 11/3$134
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/192:15 pmSNA - STL
1 stop26h 43mFrontier
Sun 11/237:57 pmSTL - SNA
1 stop17h 22mFrontier
Deal found 11/4$146
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.
Sat 11/152:20 pmSNA - STL
1 stop16h 47mFrontier
Thu 11/209:54 pmSTL - SNA
1 stop20h 05mFrontier
Deal found 11/3$176
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.
Wed 11/191:31 pmSNA - STL
2 stops27h 27mMultiple Airlines
Sun 11/237:57 pmSTL - SNA
1 stop17h 22mMultiple Airlines
Deal found 11/4$200
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:34 pmSNA - STL
1 stop15h 38mMultiple Airlines
Mon 12/87:43 pmSTL - SNA
2 stops17h 01mMultiple Airlines
Deal found 11/2$201
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 12/121:35 pmSNA - STL
1 stop18h 39mFrontier
Sun 1/181:07 pmSTL - SNA
1 stop8h 17mFrontier
Deal found 11/3$219
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.
Thu 11/1312:01 pmSNA - STL
1 stop19h 06mFrontier
Sat 11/157:45 pmSTL - SNA
1 stop17h 31mFrontier
Deal found 11/3$222
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:01 pmSNA - STL
1 stop19h 06mFrontier
Sun 11/167:45 pmSTL - SNA
1 stop17h 31mFrontier
Deal found 11/2$231
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 11/156:45 amSNA - STL
1 stop7h 11mMultiple Airlines
Thu 11/209:54 pmSTL - SNA
1 stop22h 52mMultiple Airlines
Deal found 11/1$238
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 12/161:35 pmSNA - STL
1 stop18h 39mFrontier
Fri 12/1910:10 pmSTL - SNA
1 stop22h 00mFrontier
Deal found 11/3$244
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 12/47:35 amSNA - ORD
Nonstop4h 07mAmerican Airlines
Mon 12/86:55 pmORD - SNA
Nonstop4h 46mAmerican Airlines
Deal found 11/3$269

Cheap 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 November 4, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$130
(CheapOair)

One-way from

$69
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$323
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. 9% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 4, 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

Thu 12/4

6:34 pm-12:12 pm

1 stop15h 38m

Lambert-St Louis

Sun 12/7

9:14 pm-5:39 pm

1 stop22h 25m

$134

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Thu 1/15

8:18 pm-12:15 pm

1 stop13h 57m

Lambert-St Louis

Sun 1/18

1:07 pm-7:24 pm

1 stop8h 17m

$138

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Wed 11/19

2:15 pm-6:58 pm

1 stop26h 43m

Lambert-St Louis

Sun 11/23

7:57 pm-11:19 am

1 stop17h 22m

$146

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Mon 1/5

11:53 am-10:02 am

1 stop20h 09m

Lambert-St Louis

Mon 1/12

7:43 pm-12:51 pm

1 stop19h 08m

$200

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Tue 12/16

1:35 pm-10:14 am

1 stop18h 39m

Lambert-St Louis

Fri 12/19

10:10 pm-6:10 pm

1 stop22h 00m

$244

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Thu 11/20

12:04 pm-10:02 am

1 stop19h 58m

Lambert-St Louis

Sun 11/23

7:57 pm-11:19 am

1 stop17h 22m

$246

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Thu 11/20

6:45 am-9:09 pm

1 stop12h 24m

Lambert-St Louis

Sun 11/23

7:57 pm-11:19 am

1 stop17h 22m

$248

Santa AnaMoline

SNA - MLI

SNAMLI

Santa Ana J. Wayne/Orange Cnty

Wed 11/19

2:15 pm-8:53 pm

2 stops28h 38m

Moline Quad-City

Sun 11/23

9:43 pm-2:48 pm

1 stop19h 05m

$273

Santa AnaChicago

SNA - ORD

SNAORD

Santa Ana J. Wayne/Orange Cnty

Mon 12/8

6:45 am-4:55 pm

1 stop8h 10m

Chicago O'Hare Intl

Wed 12/10

2:05 pm-10:26 pm

1 stop10h 21m

$277

Santa AnaChicago

SNA - ORD

SNAORD

Santa Ana J. Wayne/Orange Cnty

Wed 12/3

2:15 pm-8:20 pm

Nonstop4h 05m

Chicago O'Hare Intl

Sat 12/6

2:35 pm-8:42 pm

1 stop8h 07m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

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 November 4, 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 Friday evenings 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.

Weekly flight availability from Orange County to Illinois

Explore weekly flight availability from Orange County to Illinois. 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 zzKFI to USIL are scheduled on a Monday (22 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (11 on average).

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 November 4, 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
11,237 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
11,237 reviews
Alaska Airlines
8.0
Very good
11,237 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,237 reviews
Alaska Airlines
8.0
Very good
11,237 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,998 reviews
Alaska Airlines
8.0
Very good
11,237 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
11,038 reviews
Alaska Airlines
8.0
Very good
11,237 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Spirit Airlines
6.3
Okay
8,112 reviews
Alaska Airlines
8.0
Very good
11,237 reviews

Food

7.1

Overall

8.0

Entertainment

7.0

Boarding

8.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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, Alaska Airlines, and United Airlines can get you from Orange County to Illinois in just under 4h 05m. Your travel time can differ by up to 11h 33m. 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 $69. United Airlines flights start at $135 while deals on Alaska Airlines start at $138 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 November 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$103Average$201FlexibilityNo cancel feeOn-time65%
FrontierCheapest$110Average$216FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$190Average$476FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$269Average$493FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$269Average$459FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$288Average$443FlexibilityNo cancel feeOn-time63%

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