How many flights depart from Orange County to Illinois on average per day?

19 flights are operational daily from Orange County to Illinois as of March 2026. The most popular departure time for this route is 11:00AM, with 78% of flights per day taking off at noon.

How many flights depart from Orange County to Illinois on average per week?

As of March 2026, there are 135 flights per week flying from Orange County to Illinois. The most common day of the week flights depart is Fri, with 17% of flights taking off on this day.

What is the cheapest airline that flies from Orange County to Illinois?

Frontier, Delta, and Southwest are the most popular carriers operating from Orange County to Illinois

What airlines fly to Illinois?

American Airlines, United Airlines and Alaska Airlines are the top three most popular airlines that fly to Illinois from Orange County according to our data. American Airlines is the first choice among our users, with 67% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 7 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

When did momondo last update prices for flights from Orange County to Illinois?

Prices for flights from Orange County to Illinois were last updated today.

How many operators does momondo search for flights from Orange County to Illinois?

As of March 2026, there are 8 operators available to choose from for flights from Orange County to Illinois.

How old do you have to be to fly from Orange County to Illinois?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Orange County to Illinois.

What documentation or ID do you need to fly to Illinois?

The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$86 Cheap Flights from Orange County to Illinois in 2026

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Find the cheapest flights from Orange County to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:30 am - 9:00 pm

SNA

STL

11h 30m

1 stop

8:17 pm - 10:44 am

STL

SNA

16h 27m

1 stop

$210Multiple Airlines

Jo, apr 16 - Sâ, apr 18

11:29 am - 7:54 am

SNA

STL

18h 25m

2 stops

9:55 pm - 3:40 pm

STL

SNA

19h 45m

1 stop

$213Multiple Airlines

Jo, apr 16 - Lu, apr 20

8:59 pm - 3:21 pm

SNA

STL

16h 22m

1 stop

9:55 pm - 5:26 pm

STL

SNA

21h 31m

1 stop

$232Frontier

Vi, apr 17 - Du, apr 19

8:20 pm - 11:19 am

SNA

STL

12h 59m

1 stop

8:06 pm - 1:00 pm

STL

SNA

18h 54m

1 stop

$254Frontier

Jo, mar 12 - Jo, mar 19

2:40 pm - 8:45 pm

SNA

ORD

4h 05mnonstop

4:05 pm - 6:46 pm

ORD

SNA

4h 41mnonstop

$269United Airlines

Jo, apr 9 - Sâ, apr 18

1:55 pm - 8:11 pm

SNA

ORD

4h 16mnonstop

5:00 am - 9:05 am

ORD

SNA

6h 05m

1 stop

$275United Airlines

Ma, iun 2 - Ma, iun 16

12:55 pm - 10:55 pm

SNA

ORD

8h 00m

2 stops

10:30 am - 5:00 pm

ORD

SNA

8h 30m

2 stops

$276Southwest

Mi, apr 22 - Ma, apr 28

3:50 pm - 11:40 pm

SNA

MDW

5h 50m

1 stop

5:10 am - 9:40 am

MDW

SNA

6h 30m

1 stop

$277Southwest

Lu, apr 13 - Sâ, apr 18

3:10 pm - 11:59 pm

SNA

PIA

6h 49m

1 stop

6:00 am - 10:37 am

PIA

SNA

6h 37m

1 stop

$334American Airlines

Ma, iun 2 - Mi, iun 10

3:10 pm - 11:59 pm

SNA

PIA

6h 49m

1 stop

9:53 am - 6:48 pm

PIA

SNA

10h 55m

2 stops

$405American Airlines

Ma, iun 2 - Mi, iun 10

United Airlines flights from Orange County to Illinois

Our best United Airlines deals on Orange County to Illinois flight tickets

United Airlines

Apr 9

SNA2:40 pmSanta Ana J. Wayne/Orange Cnty

4h 05m

ORD8:45 pmChicago O'Hare Intl

Apr 18

ORD4:05 pmChicago O'Hare Intl

4h 41m

SNA6:46 pmSanta Ana J. Wayne/Orange Cnty

$269

United Airlines

Jun 2

SNA1:55 pmSanta Ana J. Wayne/Orange Cnty

4h 16m

ORD8:11 pmChicago O'Hare Intl

Jun 16

ORD5:00 amChicago O'Hare Intl

6h 05m

1 stop

SNA9:05 amSanta Ana J. Wayne/Orange Cnty

$275

United Airlines

Apr 9

SNA2:40 pmSanta Ana J. Wayne/Orange Cnty

4h 05m

ORD8:45 pmChicago O'Hare Intl

Apr 18

ORD7:00 amChicago O'Hare Intl

8h 18m

1 stop

SNA1:18 pmSanta Ana J. Wayne/Orange Cnty

$279

Southwest flights from Orange County to Illinois

Our best Southwest deals on Orange County to Illinois flight tickets

Southwest

Apr 22

SNA12:55 pmSanta Ana J. Wayne/Orange Cnty

8h 00m

2 stops

ORD10:55 pmChicago O'Hare Intl

Apr 28

ORD10:30 amChicago O'Hare Intl

8h 30m

2 stops

SNA5:00 pmSanta Ana J. Wayne/Orange Cnty

$276

Southwest

Apr 13

SNA3:50 pmSanta Ana J. Wayne/Orange Cnty

5h 50m

1 stop

MDW11:40 pmChicago Midway

Apr 18

MDW5:10 amChicago Midway

6h 30m

1 stop

SNA9:40 amSanta Ana J. Wayne/Orange Cnty

$277

Southwest

Apr 7

SNA12:55 pmSanta Ana J. Wayne/Orange Cnty

8h 00m

2 stops

ORD10:55 pmChicago O'Hare Intl

Apr 9

ORD4:50 pmChicago O'Hare Intl

7h 30m

1 stop

SNA10:20 pmSanta Ana J. Wayne/Orange Cnty

$282

Fly from

Fly to

Route

Depart

Return

Price

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Jo 4/16

7:30 am-9:00 pm

1 stop11h 30m

Lambert-St Louis

Sâ 4/18

8:17 pm-10:44 am

1 stop16h 27m

$210

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Jo 4/16

11:29 am-7:54 am

2 stops18h 25m

Lambert-St Louis

Lu 4/20

9:55 pm-3:40 pm

1 stop19h 45m

$213

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Vi 4/17

8:59 pm-3:21 pm

1 stop16h 22m

Lambert-St Louis

Du 4/19

9:55 pm-5:26 pm

1 stop21h 31m

$232

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Jo 3/12

8:20 pm-11:19 am

1 stop12h 59m

Lambert-St Louis

Jo 3/19

8:06 pm-1:00 pm

1 stop18h 54m

$254

Santa AnaChicago

SNA - ORD

SNAORD

Santa Ana J. Wayne/Orange Cnty

Jo 4/9

2:40 pm-8:45 pm

Nonstop4h 05m

Chicago O'Hare Intl

Sâ 4/18

4:05 pm-6:46 pm

Nonstop4h 41m

$269

Santa AnaChicago

SNA - ORD

SNAORD

Santa Ana J. Wayne/Orange Cnty

Ma 6/2

1:55 pm-8:11 pm

Nonstop4h 16m

Chicago O'Hare Intl

Ma 6/16

5:00 am-9:05 am

1 stop6h 05m

$275

Santa AnaChicago

SNA - ORD

SNAORD

Santa Ana J. Wayne/Orange Cnty

Mi 4/22

12:55 pm-10:55 pm

2 stops8h 00m

Chicago O'Hare Intl

Ma 4/28

10:30 am-5:00 pm

2 stops8h 30m

$276

Santa AnaChicago

SNA - MDW

SNAMDW

Santa Ana J. Wayne/Orange Cnty

Lu 4/13

3:50 pm-11:40 pm

1 stop5h 50m

Chicago Midway

Sâ 4/18

5:10 am-9:40 am

1 stop6h 30m

$277

Santa AnaPeoria

SNA - PIA

SNAPIA

Santa Ana J. Wayne/Orange Cnty

Ma 6/2

3:10 pm-11:59 pm

1 stop6h 49m

Greater Peoria

Mi 6/10

6:00 am-10:37 am

1 stop6h 37m

$334

Santa AnaPeoria

SNA - PIA

SNAPIA

Santa Ana J. Wayne/Orange Cnty

Ma 6/2

3:10 pm-11:59 pm

1 stop6h 49m

Greater Peoria

Mi 6/10

9:53 am-6:48 pm

2 stops10h 55m

$405

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Orange County to Illinois

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from Orange County is in September. Flight prices, which tend to average around $244, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $261.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from Orange County to Illinois is on a Wednesday when prices can be found for as low as $401. Flights from Orange County to Illinois on a Sunday will generally be more expensive and average around $561. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Illinois?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Orange County to Illinois during this time can be as low as $382. Flights in the morning are often more expensive with an average ticket price of $454.

What is the cheapest Orange County to Illinois flight route?

Fly from Santa Ana J. Wayne/Orange Cnty to Chicago O'Hare Intl for the best Orange County - Illinois flight prices

How far in advance should I book a flight to Illinois?

You are more likely to see cheaper flights to Illinois from Orange County when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $312 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Orange County for as low as $259 on momondo.

What cabin class options are available on Orange County to Illinois flights?

There are 4 cabin classes available to choose from on Orange County to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Orange County to Illinois flights?

No. A direct flight is the cheapest option for a flight between Orange County to Illinois.

Cheap Orange County to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Orange County to Illinois

Fastest flight time	3h 45m
Direct flights	Every day
Airports in Illinois	98 airports

The fastest flight from Orange County to Illinois takes 3h 45m

Direct flights go from Orange County to Illinois every day.

There are 98 airports in Illinois. From Orange County there are direct flights to Chicago O'Hare Intl (ORD), Chicago Midway (MDW).

Search flight deals

When did momondo last update prices for flights from Orange County to Illinois?
Prices for flights from Orange County to Illinois were last updated today.
How many operators does momondo search for flights from Orange County to Illinois?
As of March 2026, there are 8 operators available to choose from for flights from Orange County to Illinois.
How old do you have to be to fly from Orange County to Illinois?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Orange County to Illinois.
What documentation or ID do you need to fly to Illinois?
The travel and health documents you'll need for your trip to Illinois may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Illinois. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Orange County to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Orange County to Illinois is Boeing 737-800, representing 17.95% of all bookings. The subsequent popular models are Airbus A321neo at 12.92%, Boeing 737 MAX 8 at 8.24%, and Boeing 737-900 at 7.38%.

Best airlines flying from Orange County to Illinois

Compare and see reviews for airlines that fly from Orange County to Illinois with momondo

Airline	Rating	Free Cancellation	Price
Spirit Airlines	PriceFrom $103	Free Cancellation	Rating 6.3 8,485 reviews	Search Spirit Airlines flights
Frontier	PriceFrom $152	Free Cancellation	Rating 5.7 3,041 reviews	Search Frontier flights
United Airlines	PriceFrom $228	Free Cancellation	Rating 7.4 9,372 reviews	Search United Airlines flights
Alaska Airlines	PriceFrom $239	Free Cancellation	Rating 8.0 11,974 reviews	Search Alaska Airlines flights
JetBlue	PriceFrom $258	Free Cancellation	Rating 7.2 2,894 reviews	Search JetBlue flights
American Airlines	PriceFrom $269	Free Cancellation	Rating 7.1 11,370 reviews	Search American Airlines flights
Southwest	PriceFrom $288	Free Cancellation	Rating 8.0 4,305 reviews	Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Orange County to Illinois?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Orange County to Illinois. momondo saves you time and could save you money on your trip.

Can I find flights from Orange County to Illinois with flexible booking policies on momondo?

Flights from Orange County to Illinois with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Orange County to Illinois?

momondo helps you find the best flight between Orange County and Illinois by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Orange County to Illinois right now. Can momondo alert me if prices change?

Price alerts on flights to Illinois from Orange County are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.