Cheap flights from Illinois to Los Angeles from $145

In general, January is the cheapest month to fly from Illinois to Santa Ana, California. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $378. If you aren’t able to travel during the month of January, then book flights to Santa Ana, California from Illinois during May instead. Flights to Santa Ana, California in May, while not as cheap as those in January, still average around $408.

The cheapest day to depart from Illinois to Santa Ana, California is on a Saturday. Travelers who choose to depart for Santa Ana, California on a Saturday will often find tickets for as low as $402. The most expensive day to fly to Santa Ana, California is Sunday, with ticket prices averaging around $551.

In the morning is the cheapest time of day to fly from Illinois to Santa Ana, California when you can find flight prices for as low as $427. Flying to Santa Ana, California in the morning is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Santa Ana, California is in the evening when prices are around $451.

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

You are more likely to see cheaper flights to Santa Ana, California from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Santa Ana, California for around $418 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Santa Ana, California from Illinois for as low as $352 on momondo.

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

United Airlines, Frontier, and Southwest are the most popular carriers operating from Illinois to Santa Ana J. Wayne/Orange Cnty

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Santa Ana, California from Illinois according to our data. American Airlines is the first choice among our users, with 44% of people opting to fly with this airline when traveling to Santa Ana, California. Keep in mind that there are 7 different airlines that fly to Santa Ana, California on a routine basis, so you have a few additional options to choose from.

As of October 2026, there are 13 flights per day flying from Illinois to Santa Ana, California. The most common time of day flights depart is 5:00PM, with 51% of flights taking off in the afternoon.

As of October 2026, there are 96 flights per week flying from Illinois to Santa Ana, California. The most common day of the week flights depart is Thu, with 21% of flights taking off on this day.