Cheap flights from Santa Ana, California to Illinois from $135

The cheapest month to fly to Illinois from Santa Ana, California is in February. Flight prices, which tend to average around $416, 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 February, then flying in December is also cheap. Prices for this month can be found on momondo for an average of $422.

The cheapest day to depart from Santa Ana, California to Illinois is on a Wednesday when prices can be found for as low as $477. Flights from Santa Ana, California to Illinois on a Sunday will generally be more expensive and average around $697. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Santa Ana, California to Illinois during this time can be as low as $445. Flights in the morning are often more expensive with an average ticket price of $529.

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

You are more likely to see cheaper flights to Illinois from Santa Ana, California when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $457 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Santa Ana, California for as low as $376 on momondo.

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

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

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Illinois from Santa Ana, California according to our data. American Airlines is the first choice among our users, with 42% 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.

The number of flights available between Santa Ana, California and Illinois is 21 per day as of October 2026. The most frequent departure time is 11:00AM, with 78% of daily flights leaving at noon.

As of October 2026, there are 152 flights per week flying from Santa Ana, California to Illinois. The most common day of the week flights depart is Wed, with 16% of flights taking off on this day.