Cheap flights from Santa Ana, California to Chicago from $145

The month of February is another great option to travel to Chicago O'Hare Intl Airport, with average flight prices from Santa Ana, California averaging around $415.

The cheapest day to depart on your flight to Chicago O'Hare Intl Airport is on a Wednesday when prices can be found for as low as $406. This is often the case because there is less demand to fly during this day of the week. On the other hand, Sunday is the most expensive day to depart from Santa Ana, California because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $514.

Flying to Chicago O'Hare Intl Airport from Santa Ana, California in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $373 when looking at flights departing in the afternoon. Try not to purchase tickets at noon because they tend to be around $545. Of course, these prices can vary depending on the time of year and what airport you fly to.

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

You are more likely to see cheaper flights to Chicago O'Hare Intl Airport from Santa Ana, California when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago O'Hare Intl Airport for around $456 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Frontier is the most popular carrier operating from Santa Ana J. Wayne/Orange Cnty to Chicago O'Hare Intl

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Chicago O'Hare Intl Airport 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 Chicago O'Hare Intl Airport. Keep in mind that there are 7 different airlines that fly to Chicago O'Hare Intl Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 9% of flights between Santa Ana and Chicago have experienced a delay on any given week. The average delay length over the past 12 months has been 200 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the early afternoon have, in the past, seen delays more frequently in comparison.

Friday is statistically the day of the week which experiences the fewest number of delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, United Airlines have had the least number of delays on this route over the last 12 months; with about 5% of their flights experiencing any sort of delay.

As of October 2026, there are 22 flights per day flying from Santa Ana, California to Chicago O'Hare Intl Airport. The most common time of day flights depart is 11:00AM, with 77% of flights taking off at noon.

As of October 2026, there are 160 flights per week flying from Santa Ana, California to Chicago O'Hare Intl Airport. The most common day of the week flights depart is Tue, with 16% of flights taking off on this day.