What is the cheapest airline that flies from Los Angeles to Illinois?

Frontier, Spirit Airlines, and Southwest are the most popular carriers operating from Los Angeles 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 Los Angeles according to our data. American Airlines is the first choice among our users, with 45% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 8 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 Los Angeles to Illinois on average per week?

809 flights are operational weekly from Los Angeles to Illinois as of September 2025. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.

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

As of September 2025, there are 115 flights per day flying from Los Angeles to Illinois. The most common time of day flights depart is 10:00AM, with 52% of flights taking off at noon.

When did momondo last update prices for flights from Los Angeles Airport to Illinois?

Prices for flights from Los Angeles Airport to Illinois are updated daily.

How many operators does momondo search for flights from Los Angeles Airport to Illinois?

As of September 2025, there are 8 operators available to choose from for flights from Los Angeles Airport to Illinois.

How old do you have to be to fly from Los Angeles Airport 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 Los Angeles Airport to Illinois.

What documentation or ID do you need to fly to Illinois?

The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

$74 Cheap Flights from Los Angeles to Illinois in 2025/26

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Find the cheapest flights from Los Angeles to Illinois

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

1:23 pm - 11:58 pmLAX-ORD

8h 35m1 stop

7:09 pm - 9:40 pmORD-LAX

4h 31mnonstop

$143Multiple Airlines

Find Deal

Sat, Sep 27 - Sat, Oct 4

12:05 pm - 6:14 pmLAX-ORD

4h 09mnonstop

7:09 pm - 9:40 pmORD-LAX

4h 31mnonstop

$144Spirit Airlines

Find Deal

Wed, Oct 1 - Sat, Oct 4

7:00 pm - 7:54 amLAX-ORD

10h 54m1 stop

6:30 am - 8:56 amORD-LAX

4h 26mnonstop

$145Frontier

Find Deal

Sat, Nov 15 - Mon, Nov 17

4:21 pm - 10:43 pmLAX-ORD

4h 22mnonstop

7:00 am - 9:29 amORD-LAX

4h 29mnonstop

$146Frontier

Find Deal

Thu, Oct 2 - Sat, Oct 4

4:00 pm - 10:00 pmLAX-MDW

4h 00mnonstop

9:25 pm - 11:55 pmMDW-LAX

4h 30mnonstop

$197Southwest

Find Deal

Tue, Oct 14 - Tue, Oct 21

5:55 am - 12:00 pmLAX-MDW

4h 05mnonstop

9:25 pm - 11:55 pmMDW-LAX

4h 30mnonstop

$208Southwest

Find Deal

Sat, Oct 11 - Tue, Oct 14

12:45 am - 9:18 amLAX-PIA

6h 33m1 stop

10:45 am - 6:07 pmPIA-LAX

9h 22m1 stop

$289American Airlines

Find Deal

Wed, Nov 19 - Sun, Nov 23

12:45 am - 10:12 amLAX-MLI

7h 27m1 stop

6:20 am - 11:54 amMLI-LAX

7h 34m1 stop

$289American Airlines

Find Deal

Mon, Oct 13 - Tue, Oct 21

12:25 am - 10:15 amLAX-MLI

7h 50m1 stop

5:20 pm - 11:59 pmMLI-LAX

8h 39m1 stop

$313United Airlines

Find Deal

Tue, Nov 11 - Sun, Nov 16

12:20 am - 10:51 amLAX-DEC

8h 31m1 stop

3:20 pm - 9:53 pmDEC-LAX

8h 33m1 stop

$374United Airlines

Find Deal

Thu, Mar 5 - Tue, Mar 10

Frontier flights from Los Angeles to Illinois

Our best Frontier deals on Los Angeles to Illinois flight tickets

Frontier

Nov 15

LAX7:00 pmLos Angeles

10h 54m

1 stop

ORD7:54 amChicago O'Hare Intl

Nov 17

ORD6:30 amChicago O'Hare Intl

4h 26m

LAX8:56 amLos Angeles

$145

Find similar

Frontier

Oct 2

LAX4:21 pmLos Angeles

4h 22m

ORD10:43 pmChicago O'Hare Intl

Oct 4

ORD7:00 amChicago O'Hare Intl

4h 29m

LAX9:29 amLos Angeles

$146

Find similar

Frontier

Sep 27

LAX4:51 pmLos Angeles

4h 22m

ORD11:13 pmChicago O'Hare Intl

Oct 4

ORD7:00 amChicago O'Hare Intl

4h 29m

LAX9:29 amLos Angeles

$149

Find similar

Spirit Airlines flights from Los Angeles to Illinois

Our best Spirit Airlines deals on Los Angeles to Illinois flight tickets

Spirit Airlines

Oct 1

LAX12:05 pmLos Angeles

4h 09m

ORD6:14 pmChicago O'Hare Intl

Oct 4

ORD7:09 pmChicago O'Hare Intl

4h 31m

LAX9:40 pmLos Angeles

$144

Find similar

Spirit Airlines

Sep 27

LAX12:05 pmLos Angeles

4h 09m

ORD6:14 pmChicago O'Hare Intl

Oct 4

ORD12:46 pmChicago O'Hare Intl

8h 09m

1 stop

LAX6:55 pmLos Angeles

$154

Find similar

Spirit Airlines

Sep 29

LAX5:50 amLos Angeles

4h 09m

ORD11:59 amChicago O'Hare Intl

Oct 1

ORD7:09 pmChicago O'Hare Intl

4h 31m

LAX9:40 pmLos Angeles

$176

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Sat 9/27

1:23 pm-11:58 pm

1 stop8h 35m

Chicago O'Hare Intl

Sat 10/4

7:09 pm-9:40 pm

Nonstop4h 31m

$143

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Wed 10/1

12:05 pm-6:14 pm

Nonstop4h 09m

Chicago O'Hare Intl

Sat 10/4

7:09 pm-9:40 pm

Nonstop4h 31m

$144

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Sat 11/15

7:00 pm-7:54 am

1 stop10h 54m

Chicago O'Hare Intl

Mon 11/17

6:30 am-8:56 am

Nonstop4h 26m

$145

Los AngelesChicago

LAX - ORD

LAXORD

Los Angeles

Thu 10/2

4:21 pm-10:43 pm

Nonstop4h 22m

Chicago O'Hare Intl

Sat 10/4

7:00 am-9:29 am

Nonstop4h 29m

$146

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Tue 10/14

4:00 pm-10:00 pm

Nonstop4h 00m

Chicago Midway

Tue 10/21

9:25 pm-11:55 pm

Nonstop4h 30m

$197

Los AngelesChicago

LAX - MDW

LAXMDW

Los Angeles

Sat 10/11

5:55 am-12:00 pm

Nonstop4h 05m

Chicago Midway

Tue 10/14

9:25 pm-11:55 pm

Nonstop4h 30m

$208

Los AngelesPeoria

LAX - PIA

LAXPIA

Los Angeles

Wed 11/19

12:45 am-9:18 am

1 stop6h 33m

Greater Peoria

Sun 11/23

10:45 am-6:07 pm

1 stop9h 22m

$289

Los AngelesMoline

LAX - MLI

LAXMLI

Los Angeles

Mon 10/13

12:45 am-10:12 am

1 stop7h 27m

Moline Quad-City

Tue 10/21

6:20 am-11:54 am

1 stop7h 34m

$289

Los AngelesMoline

LAX - MLI

LAXMLI

Los Angeles

Tue 11/11

12:25 am-10:15 am

1 stop7h 50m

Moline Quad-City

Sun 11/16

5:20 pm-11:59 pm

1 stop8h 39m

$313

Los AngelesDecatur

LAX - DEC

LAXDEC

Los Angeles

Thu 3/5

12:20 am-10:51 am

1 stop8h 31m

Decatur Arpt

Tue 3/10

3:20 pm-9:53 pm

1 stop8h 33m

$374

Flights are sorted by cheapest round-trip flights first.

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How to get the cheapest flight ticket from Los Angeles 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 Los Angeles is in February. Flight prices, which tend to average around $247, 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 August is also cheap. Prices for this month can be found on momondo for an average of $263.

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

The cheapest day to depart from Los Angeles to Illinois is on a Wednesday when prices can be found for as low as $361. Flights from Los Angeles to Illinois on a Sunday will generally be more expensive and average around $457. 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 Los Angeles to Illinois during this time can be as low as $280. Flights at noon are often more expensive with an average ticket price of $452.

What is the cheapest Los Angeles to Illinois flight route?

Fly from Los Angeles to Chicago O'Hare Intl for the best Los Angeles - 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 Los Angeles when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $300 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Los Angeles for as low as $254 on momondo.

What cabin class options are available on Los Angeles to Illinois flights?

There are 4 cabin classes available to choose from on Los Angeles 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 Los Angeles to Illinois flights?

No. A direct flight is the cheapest option for a flight between Los Angeles to Illinois.

Cheap Los Angeles to Illinois flight deals and tips

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

Best Price Found	$142
Fastest flight time	3h 25m
Direct flights	Every day
Airports in Illinois	1 airport

The best one-way flight to Illinois from Los Angeles in the past 72 hours is $142. The best round-trip flight deal from Los Angeles to Illinois found on momondo in the last 72 hours is $239.

The fastest flight from Los Angeles to Illinois takes 3h 25m

Direct flights go from Los Angeles to Illinois every day.

There is 1 airport near Illinois: Lambert-St Louis (STL)

Search flight deals

When did momondo last update prices for flights from Los Angeles Airport to Illinois?
Prices for flights from Los Angeles Airport to Illinois are updated daily.
How many operators does momondo search for flights from Los Angeles Airport to Illinois?
As of September 2025, there are 8 operators available to choose from for flights from Los Angeles Airport to Illinois.
How old do you have to be to fly from Los Angeles Airport 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 Los Angeles Airport to Illinois.
What documentation or ID do you need to fly to Illinois?
The necessary travel and health documents for your Illinois trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Los Angeles to Illinois?
momondo data reveals that the most frequently booked plane model on the route from Los Angeles to Illinois is Airbus A321neo, representing 15.56% of all bookings. The subsequent popular models are Boeing 737-800 at 12.29%, Airbus A321-100/200 at 10.60%, and Boeing 757-300 at 7.44%.

Best airlines flying from Los Angeles to Illinois

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

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $91	Free Cancellation	Rating 5.8 3,174 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $97	Free Cancellation	Rating 6.3 8,019 reviews	Search Spirit Airlines flights
Sun Country Air	PriceFrom $130	Free Cancellation	Rating 6.9 330 reviews	Search Sun Country Air flights
United Airlines	PriceFrom $149	Free Cancellation	Rating 7.4 8,924 reviews	Search United Airlines flights
Southwest	PriceFrom $157	Free Cancellation	Rating 8.0 4,242 reviews	Search Southwest flights
American Airlines	PriceFrom $192	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $218	Free Cancellation	Rating 7.9 7,957 reviews	Search Delta flights
Alaska Airlines	PriceFrom $221	Free Cancellation	Rating 8.0 10,000 reviews	Search Alaska Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Los Angeles to Illinois?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Los Angeles to Illinois for you.

Can I find flights from Los Angeles to Illinois with flexible booking policies on momondo?

momondo does allow users to show only those flights to Illinois from Los Angeles which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Los Angeles to Illinois?

Once all potential Los Angeles to Illinois flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Los Angeles to Illinois right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Illinois from Los Angeles. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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.

Start using Trips

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Thu 10/16

Thu 10/23

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Find better results for your trip to Illinois

Popular cities in Illinois

Flights to New Yorkfrom $49

Flights to Los Angelesfrom $49

Flights to Miamifrom $49

Flights to Chicagofrom $49

Flights to Orlandofrom $60

Flights to Las Vegasfrom $48

Flights to San Franciscofrom $53

Flights to Washington, D.C.from $49

Flights to Bostonfrom $62

Flights to Atlantafrom $51

Flights to Dallasfrom $68

Flights to Seattlefrom $69

Cheap flights from Los Angeles to Illinois from $74

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Los Angeles to Illinois departing on 10/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Los Angeles to Illinois

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

Frontier flights from Los Angeles to Illinois

Our best Frontier deals on Los Angeles to Illinois flight tickets

Spirit Airlines flights from Los Angeles to Illinois

Our best Spirit Airlines deals on Los Angeles to Illinois flight tickets

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Use the filters below to find and compare flights from Los Angeles to Illinois that are best for you.

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How to get the cheapest flight ticket from Los Angeles 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?

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?

Our most recent data shows that the best time of day to fly to Illinois is in the afternoon. Flights from Los Angeles to Illinois during this time can be as low as $280. Flights at noon are often more expensive with an average ticket price of $452.

What is the cheapest Los Angeles to Illinois flight route?

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

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

What cabin class options are available on Los Angeles to Illinois flights?

There are 4 cabin classes available to choose from on Los Angeles 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 Los Angeles to Illinois flights?

No. A direct flight is the cheapest option for a flight between Los Angeles to Illinois.

What is the cheapest airline that flies from Los Angeles to Illinois?

Frontier, Spirit Airlines, and Southwest are the most popular carriers operating from Los Angeles to Illinois

What airlines fly to Illinois?

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

As of September 2025, there are 115 flights per day flying from Los Angeles to Illinois. The most common time of day flights depart is 10:00AM, with 52% of flights taking off at noon.

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

809 flights are operational weekly from Los Angeles to Illinois as of September 2025. The most popular departure day for this route is Mon, with 17% of flights per week taking off on this day.

Cheap Los Angeles to Illinois flight deals and tips

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

Best Price Found

Fastest flight time

Direct flights

Airports in Illinois

When did momondo last update prices for flights from Los Angeles Airport to Illinois?

How many operators does momondo search for flights from Los Angeles Airport to Illinois?

How old do you have to be to fly from Los Angeles Airport to Illinois?

What documentation or ID do you need to fly to Illinois?

What is the most popular plane model from Los Angeles to Illinois?

Best airlines flying from Los Angeles to Illinois

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

Why use momondo?

Why should I use momondo to find a flight deal from Los Angeles to Illinois?

Can I find flights from Los Angeles to Illinois with flexible booking policies on momondo?

How can momondo help me find flights from Los Angeles to Illinois?

I’m not ready to book a flight from Los Angeles to Illinois right now. Can momondo alert me if prices change?

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