What airlines fly to Illinois?

American Airlines, United Airlines and Frontier 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 44% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 9 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 May 2026, there are 321 flights per day flying from California to Illinois. The most common time of day flights depart is 10:00AM, with 46% of flights taking off at noon.

What is the cheapest airline that flies from California to Illinois?

Frontier, Delta, and Alaska Airlines are the most popular carriers operating from California to Illinois

How many flights depart from California to Illinois on average per week?

As of May 2026, 2,248 flights take off from California and land in Illinois each week. The most common flight departure day for this route is Wed, with 17% of weekly flights taking off on this day.

How long is the flight from California to Illinois?

The flight from California to Illinois depends on which airports you’re departing and arriving from and whether or not you have a layover. If you fly from Los Angeles (a popular airport in California) to Chicago O'Hare Intl Airport (the most popular airport in Illinois), then the flight time is 4h 02m on average. If you fly from Ontario (another popular airport in California) to Chicago O'Hare Intl Airport, then the average flight time is 4h 03m.

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 May 2026, there are 9 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.

$103 Cheap Flights from California to Illinois in 2026

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Find the cheapest flights from California to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

11:20 pm - 5:07 am

LAS

ORD

3h 47mnonstop

7:15 am - 9:23 am

ORD

LAS

4h 08mnonstop

$203Frontier

Wed, Jul 1 - Tue, Jul 7

11:59 pm - 6:17 am

LAX

ORD

4h 18mnonstop

9:13 pm - 11:57 pm

ORD

LAX

4h 44mnonstop

$204Frontier

Tue, Jul 7 - Tue, Jul 14

2:20 pm - 9:50 pm

LAX

MDW

5h 30m

1 stop

9:15 pm - 11:45 pm

MDW

LAX

4h 30mnonstop

$211Southwest

Wed, Jul 8 - Wed, Jul 15

7:30 am - 4:10 pm

LAX

MDW

6h 40m

1 stop

9:25 am - 1:05 pm

MDW

LAX

5h 40m

1 stop

$216Southwest

Tue, Aug 4 - Wed, Aug 19

6:10 am - 12:25 pm

ONT

ORD

4h 15mnonstop

8:18 pm - 10:51 pm

ORD

ONT

4h 33mnonstop

$281United Airlines

Tue, Jul 14 - Tue, Jul 21

10:12 am - 7:03 pm

SJC

ORD

6h 51m

1 stop

7:20 am - 1:30 pm

ORD

SJC

8h 10m

1 stop

$296Alaska Airlines

Tue, Sep 29 - Wed, Sep 30

3:15 pm - 11:36 pm

SJC

ORD

6h 21m

1 stop

6:20 am - 11:24 am

ORD

SJC

7h 04m

1 stop

$303Alaska Airlines

Tue, Jun 23 - Tue, Jun 30

12:51 pm - 9:18 pm

SJC

ORD

6h 27m

1 stop

7:55 pm - 10:42 pm

ORD

SJC

4h 47mnonstop

$308United Airlines

Tue, Oct 6 - Tue, Oct 20

6:00 am - 12:34 pm

SFO

ORD

4h 34mnonstop

6:09 pm - 11:30 pm

ORD

SFO

7h 21m

1 stop

$312American Airlines

Sat, Sep 26 - Sat, Sep 26

10:09 am - 7:59 pm

SFO

ORD

7h 50m

1 stop

8:45 am - 11:27 am

ORD

SFO

4h 42mnonstop

$313American Airlines

Fri, Jul 10 - Wed, Jul 15

Frontier flights from California to Illinois

Our best Frontier deals on California to Illinois flight tickets

Frontier

Jul 1

LAS11:20 pmLas Vegas Harry Reid Intl

3h 47m

ORD5:07 amChicago O'Hare Intl

Jul 7

ORD7:15 amChicago O'Hare Intl

4h 08m

LAS9:23 amLas Vegas Harry Reid Intl

$203

Frontier

Jul 7

LAX11:59 pmLos Angeles

4h 18m

ORD6:17 amChicago O'Hare Intl

Jul 11

ORD9:13 pmChicago O'Hare Intl

4h 44m

LAX11:57 pmLos Angeles

$204

Frontier

Jul 21

LAX6:30 amLos Angeles

12h 22m

1 stop

ORD8:52 pmChicago O'Hare Intl

Jul 28

ORD9:13 pmChicago O'Hare Intl

4h 44m

LAX11:57 pmLos Angeles

$205

Delta flights from California to Illinois

Our best Delta deals on California to Illinois flight tickets

Delta

Jul 8

LAX5:15 pmLos Angeles

4h 03m

ORD11:18 pmChicago O'Hare Intl

Jul 28

ORD9:45 amChicago O'Hare Intl

8h 32m

1 stop

LAX4:17 pmLos Angeles

$211

Delta

Jul 8

LAX5:15 pmLos Angeles

4h 03m

ORD11:18 pmChicago O'Hare Intl

Jul 15

ORD7:37 amChicago O'Hare Intl

4h 23m

LAX10:00 amLos Angeles

$219

Delta

Jul 8

LAX6:15 amLos Angeles

6h 50m

1 stop

ORD3:05 pmChicago O'Hare Intl

Jul 28

ORD9:45 amChicago O'Hare Intl

8h 32m

1 stop

LAX4:17 pmLos Angeles

$221

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

Las VegasChicago

LAS - ORD

LASORD

Las Vegas Harry Reid Intl

Wed 7/1

11:20 pm-5:07 am

Nonstop3h 47m

Chicago O'Hare Intl

Tue 7/7

7:15 am-9:23 am

Nonstop4h 08m

$203

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Tue 7/7

11:59 pm-6:17 am

Nonstop4h 18m

Chicago O'Hare Intl

Tue 7/14

9:13 pm-11:57 pm

Nonstop4h 44m

$204

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Wed 7/8

2:20 pm-9:50 pm

1 stop5h 30m

Chicago Midway

Wed 7/15

9:15 pm-11:45 pm

Nonstop4h 30m

$211

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Tue 8/4

7:30 am-4:10 pm

1 stop6h 40m

Chicago Midway

Wed 8/19

9:25 am-1:05 pm

1 stop5h 40m

$216

OntarioChicago

ONT - ORD

ONTORD

Ontario

Tue 7/14

6:10 am-12:25 pm

Nonstop4h 15m

Chicago O'Hare Intl

Tue 7/21

8:18 pm-10:51 pm

Nonstop4h 33m

$281

San JoseChicago

SJC - ORD

SJCORD

San Jose

Tue 9/29

10:12 am-7:03 pm

1 stop6h 51m

Chicago O'Hare Intl

Wed 9/30

7:20 am-1:30 pm

1 stop8h 10m

$296

San JoseChicago

SJC - ORD

SJCORD

San Jose

Tue 6/23

3:15 pm-11:36 pm

1 stop6h 21m

Chicago O'Hare Intl

Tue 6/30

6:20 am-11:24 am

1 stop7h 04m

$303

San JoseChicago

SJC - ORD

SJCORD

San Jose

Tue 10/6

12:51 pm-9:18 pm

1 stop6h 27m

Chicago O'Hare Intl

Tue 10/20

7:55 pm-10:42 pm

Nonstop4h 47m

$308

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Sat 9/26

6:00 am-12:34 pm

Nonstop4h 34m

Chicago O'Hare Intl

Sat 9/26

6:09 pm-11:30 pm

1 stop7h 21m

$312

San FranciscoChicago

SFO - ORD

SFOORD

San Francisco

Fri 7/10

10:09 am-7:59 pm

1 stop7h 50m

Chicago O'Hare Intl

Wed 7/15

8:45 am-11:27 am

Nonstop4h 42m

$313

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

What is the cheapest month to fly to Illinois?

The cheapest month to fly to Illinois from California is in September. Flight prices, which tend to average around $300, 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 September, then flying in August is also cheap. Prices for this month can be found on momondo for an average of $312.

What is the cheapest day to depart on your flight to Illinois?

The cheapest day to depart from California to Illinois is on a Thursday when prices can be found for as low as $381. Flights from California to Illinois on a Sunday will generally be more expensive and average around $449. 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 $310. Flights at noon are often more expensive with an average ticket price of $489.

What is the cheapest California to Illinois flight route?

Fly from Los Angeles Los Angeles to Chicago O'Hare Intl for the best California - Illinois flight prices

How far in advance should I book a flight from California to Illinois?

You are more likely to see cheaper flights to Illinois from California when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $332 when searching 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 $278 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.

Can stopping save me money on California to Illinois flights?

You could potentially save up to 22% on your flight if you consider stops on a California to Illinois flight.

Cheap California to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from California to Illinois

Best Price Found	$180
Fastest flight time	3h 05m
Direct flights	Every day
Airports in Illinois	98 airports

The best one-way flight to Illinois from California in the past 72 hours is $180. The best round-trip flight deal from California to Illinois found on momondo in the last 72 hours is $348.

The fastest flight from California to Illinois takes 3h 05m

Direct flights go from California to Illinois every day.

There are 98 airports in Illinois. From California there are direct flights to Chicago O'Hare Intl (ORD).

Search flight deals

Frequently asked questions about flying 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 May 2026, there are 9 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 Airbus A321neo, representing 18.96% of all bookings. The subsequent popular models are Boeing 737-800 at 17.15%, Airbus A321-100/200 at 10.75%, and Boeing 737 MAX 8 at 10.14%.

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
Frontier	PriceFrom $51	Free Cancellation	Rating 5.6 2,932 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $97	Free Cancellation	Rating 6.2	Search Spirit Airlines flights
Hawaiian Airlines	PriceFrom $108	Free Cancellation	Rating 7.8 2,835 reviews	Search Hawaiian Airlines flights
Delta	PriceFrom $122	Free Cancellation	Rating 7.9 8,423 reviews	Search Delta flights
Alaska Airlines	PriceFrom $153	Free Cancellation	Rating 7.9 12,422 reviews	Search Alaska Airlines flights
American Airlines	PriceFrom $157	Free Cancellation	Rating 7.1 11,640 reviews	Search American Airlines flights
JetBlue	PriceFrom $166	Free Cancellation	Rating 7.1 2,980 reviews	Search JetBlue flights
United Airlines	PriceFrom $167	Free Cancellation	Rating 7.4 9,753 reviews	Search United Airlines flights
Southwest	PriceFrom $179	Free Cancellation	Rating 7.9 4,265 reviews	Search Southwest flights

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.

An easier way to manage your Illinois trip

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Popular cities in Illinois

Flights to New Yorkfrom $77

Flights to Los Angelesfrom $65

Flights to Orlandofrom $68

Flights to Miamifrom $71

Flights to Chicagofrom $61

Flights to San Franciscofrom $66

Flights to Las Vegasfrom $50

Flights to Washington, D.C.from $57

Flights to Bostonfrom $79

Flights to Atlantafrom $51

Flights to Fort Lauderdalefrom $57

Flights to Dallasfrom $104

Cheap flights from California to Illinois from $103

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 7/3. 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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Frontier flights from California to Illinois

Our best Frontier deals on California to Illinois flight tickets

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Our best Delta deals on California to Illinois flight tickets

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See travel insights to Illinois from

How to get the cheapest flight ticket from California to Illinois

What is the cheapest month to fly to Illinois?

What is the cheapest day to depart on your flight to Illinois?

What is the cheapest time of day to depart on your flight to Illinois?

What is the cheapest California to Illinois flight route?

How far in advance should I book a flight from California to Illinois?

What cabin class options are available on California to Illinois flights?

Can stopping save me money on California to Illinois flights?

What is the cheapest airline that flies from California to Illinois?

What airlines fly to Illinois?

How many flights depart from California to Illinois on average per day?

How many flights depart from California to Illinois on average per week?

How long is the flight from California to Illinois?

Cheap California to Illinois flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from California to Illinois

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

Frequently asked questions about flying from California to Illinois

Best airlines flying from California to Illinois

Compare and see reviews for airlines that fly from California to Illinois with momondo

Why use momondo?

An easier way to manage your Illinois trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Illinois

Popular cities in Illinois

Popular flights according to clicks in the last 7 days on momondo

California flight routes

According to popular flight searches on momondo this year

Illinois flight routes

According to popular flight searches on momondo this year

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