$80 Find Cheap Flights from California to Illinois - Compare and Save

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from California to Illinois.

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from California to Illinois is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly from California to Illinois with an airline and back with another airline.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying from California to Illinois up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

California and Illinois are connected by different airlines. The airlines that fly that route the most regularly are United Airlines (292 flights per week), Air Canada (252 flights per week), and American Airlines (182 flights per week).

There are 12 airports in Illinois. The busiest airport is Chicago O'Hare Airport (ORD), with 91% of all flights arriving there.

Prices will differ depending on the departure airport, but generally, the cheapest airport to fly to in Illinois is Chicago Midway Airport (MDW), with an average flight price of $282.

Based on KAYAK data, the cheapest day to fly to Illinois is Wednesday where round-trip tickets can be as cheap as $402. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $494 on average.

The cheapest time of day to fly to Illinois is generally in the evening, when round-trip flights cost $347 on average. Morning departures are around 32% more expensive than evening flights, on average. The most expensive time of day to fly to Illinois is generally in the afternoon, which is peak travel time and where the average cost of a ticket is $512.

The cheapest ticket to Illinois from California found in the last 5 days was to Chicago Midway Airport, at $204 round-trip. The most popular route is Burbank (BUR) to Chicago Midway Airport (MDW) and the cheapest round-trip airline ticket found on this route in the last 5 days was $204.

The cheapest month for flights from California to Illinois is September, when tickets cost $191 (return) on average. On the other hand, the most expensive months are March and January, when the average cost of round-trip tickets is $262 and $261 respectively.

To get a below average price on the flight from California to Illinois, you should book around 3 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

From California, there are direct flights to Illinois from 13 cities. The city with the most direct flights is Los Angeles, with 962 direct flights each week.

There are around 339 direct flights from within California to Illinois every day. Most flights (51%) depart in the morning.

Each week there are around 2,367 direct flights from within California to Illinois. The most common day for departures is Sunday, with 15% of flights taking off on this day.

An average nonstop flight from California to Illinois takes 4h 46m, covering a distance of 1695 miles. The shortest route is Las Vegas (LAS) to St. Louis (STL) with an average flight time of 3h 00m.

Each week, there are 2,318 medium-haul flights (3-6 hour flight duration) and 49 short-haul flights (up to 3 hour flight duration) to Illinois. There aren't any long-haul flights (6-12 hour flight duration).

Based on KAYAK flight searches, the most popular destination is Chicago (91% of total searches to Illinois). The next most popular destinations are St. Louis (8%) and Moline (1%). Searches for flights to Peoria (1%), to Evansville (0%) and to Bloomington (0%) are also popular.