Cheap flights from California to Illinois from $44
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to Illinois departing on 5/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from California 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
What is the cheapest month to fly to Illinois?
The cheapest month to fly to Illinois from California is in February. Flight prices, which tend to average around $246, 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 October is also cheap. Prices for this month can be found on momondo for an average of $270.
What is the cheapest day to depart on your flight to Illinois?
The cheapest day to depart from California to Illinois is on a Wednesday when prices can be found for as low as $372. Flights from California to Illinois on a Sunday will generally be more expensive and average around $481. 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 California to Illinois during this time can be as low as $308. Flights at noon are often more expensive with an average ticket price of $464.
What is the cheapest California to Illinois flight route?
Fly from San Diego to Chicago O'Hare Intl for the best California - 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 California when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $309 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from California for as low as $264 on momondo.
What cabin class options are available on California to Illinois flights?
There are 4 cabin classes available to choose from on California to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from California to Illinois?
Spirit Airlines, Frontier, and Hawaiian Airlines are the most popular carriers operating from California to Illinois
What airlines fly to Illinois?
American Airlines, United Airlines and Spirit Airlines are the top three most popular airlines that fly to Illinois from California according to our data. American Airlines is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 10 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.
How many flights depart from California to Illinois on average per day?
As of April 2025, there are 177 flights per day flying from California to Illinois. The most common time of day flights depart is 11:00PM, with 43% of flights taking off at noon.
How many flights depart from California to Illinois on average per week?
As of April 2025, 1,239 flights take off from California and land in Illinois each week. The most common flight departure day for this route is Wed, with 22% of weekly flights taking off on this day.
Cheap California to Illinois flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from California to Illinois
When did momondo last update prices for flights from California to Illinois?
Prices for flights from California to Illinois were last updated today.
How many operators does momondo search for flights from California to Illinois?
As of April 2025, there are 10 operators available to choose from for flights from California to Illinois.
How old do you have to be to fly from California to Illinois?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from California to Illinois.
What documentation or ID do you need to fly to Illinois?
The required travel and health documents for your Illinois trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Illinois. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from California to Illinois?
momondo data reveals that the most frequently booked plane model on the route from California to Illinois is Boeing 737-800, representing 18.39% of all bookings. The subsequent popular models are Airbus A321neo at 16.90%, Boeing 737 MAX 8 at 8.62%, and Boeing 757-300 at 8.43%.
Best airlines flying from California to Illinois
Compare and see reviews for airlines that fly from California to Illinois with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $49 | Free Cancellation | Rating 7.3 734 reviews | |||
| PriceFrom $55 | Free Cancellation | Rating 5.9 3,287 reviews | |||
| PriceFrom $74 | Free Cancellation | Rating 6.3 7,962 reviews | |||
| PriceFrom $130 | Free Cancellation | Rating 6.9 346 reviews | |||
| PriceFrom $138 | Free Cancellation | Rating 8.0 9,968 reviews | |||
| PriceFrom $138 | Free Cancellation | Rating 7.9 2,408 reviews | |||
| PriceFrom $157 | Free Cancellation | Rating 8.0 4,294 reviews | |||
| PriceFrom $179 | Free Cancellation | Rating 7.4 8,696 reviews | |||
| PriceFrom $181 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $235 | Free Cancellation | Rating 8.0 7,934 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from California to Illinois?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from California to Illinois. momondo saves you time and could save you money on your trip.
Can I find flights from California to Illinois with flexible booking policies on momondo?
Flights from California 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 California to Illinois?
momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from California to Illinois.
I’m not ready to book a flight from California to Illinois right now. Can momondo alert me if prices change?
If you are not ready to book a flight from California to Illinois now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Illinois and let you know when they change.