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Pasadena

$62+ Cheap flights from Illinois to Pasadena, CA

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — LAX
Jan 17 — Jan 241
Sat 1/17
Sat 1/24
1 adult, Economy
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Cheap flight deals from Illinois to Pasadena

Cheapest flights from Illinois to Pasadena
Explore the most affordable flight options available from Illinois to Pasadena. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 18, 2025.

This Mytrip deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:02 pmORD - LAX
Nonstop4h 39mFrontier
Thu 12/259:41 amLAX - ORD
Nonstop4h 08mFrontier
Deal found 12/17$188
This Frontier deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/189:33 pmORD - LAX
1 stop12h 42mFrontier
Sat 1/1710:45 pmLAX - ORD
1 stop11h 23mFrontier
Deal found 12/15$211
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/189:33 pmORD - LAX
1 stop12h 42mMultiple Airlines
Thu 12/2511:59 pmLAX - ORD
Nonstop4h 06mMultiple Airlines
Deal found 12/15$225
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/253:27 pmORD - LAX
1 stop7h 04mMultiple Airlines
Tue 1/611:59 pmLAX - ORD
Nonstop4h 06mMultiple Airlines
Deal found 12/16$228
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/247:00 amORD - LAX
1 stop26h 42mMultiple Airlines
Thu 12/2511:59 pmLAX - ORD
Nonstop4h 06mMultiple Airlines
Deal found 12/16$230
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/259:33 pmORD - LAX
1 stop12h 42mMultiple Airlines
Wed 12/3111:59 pmLAX - ORD
Nonstop4h 06mMultiple Airlines
Deal found 12/15$231
This Kiwi.com deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:40 amSTL - LAX
1 stop9h 23mFrontier
Thu 1/89:46 pmLAX - STL
1 stop12h 26mFrontier
Deal found 12/17$232
This CheapOair deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:10 pmSTL - LAX
1 stop24h 21mFrontier
Sat 1/1011:31 amLAX - STL
1 stop22h 08mFrontier
Deal found 12/17$234
This Kiwi.com deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/2310:10 pmSTL - LAX
1 stop16h 06mFrontier
Thu 1/89:46 pmLAX - STL
1 stop12h 26mFrontier
Deal found 12/17$238
This Mytrip deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/2210:10 pmSTL - LAX
1 stop16h 06mFrontier
Thu 12/259:58 pmLAX - STL
1 stop21h 27mFrontier
Deal found 12/15$240
This Kiwi.com deal was found by Cheapflights users on 12/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:02 pmORD - LAX
Nonstop4h 39mMultiple Airlines
Wed 12/3111:59 pmLAX - ORD
Nonstop4h 06mMultiple Airlines
Deal found 12/17$240
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/313:10 pmMDW - LAX
2 stops22h 54mFrontier
Wed 1/73:42 pmLAX - MDW
1 stop18h 03mFrontier
Deal found 12/16$245

Find flight deals from Illinois to Pasadena

Keep the following information in mind while searching for Illinois to Pasadena flight deals. Data was last updated December 18, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$135
(Kiwi.com)

One-way from

$62
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$374
Provider with most accurate pricing for Chicago (CHI)-Los Angeles flight deals.
Search Deals
Provider most trusted by Cheapflights users for Chicago (CHI)-Los Angeles flights.
Search Deals
From Illinois to Pasadena
Search Deals
One-way flight from Illinois to Pasadena
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($38 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Illinois to Pasadena that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Illinois to Pasadena that are best for you.

Fly from

Illinois

Fly to

Pasadena

Route

Depart

Return

Price

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Sat 1/17

2:40 pm-5:17 pm

Nonstop4h 37m

Los Angeles

Tue 1/20

6:50 pm-12:58 am

Nonstop4h 08m

$159

ChicagoLos Angeles

MDW - LAX

MDWLAX

Chicago Midway

Sat 1/17

11:00 am-2:55 pm

1 stop5h 55m

Los Angeles

Tue 1/20

8:45 pm-5:05 am

1 stop6h 20m

$218

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Sat 2/14

4:00 pm-6:45 pm

Nonstop4h 45m

Los Angeles

Mon 2/16

12:25 am-6:20 am

Nonstop3h 55m

$236

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Wed 1/14

8:10 pm-10:57 pm

Nonstop4h 47m

Los Angeles

Sat 1/17

12:30 am-6:30 am

Nonstop4h 00m

$236

ChicagoLos Angeles

ORD - LAX

ORDLAX

Chicago O'Hare Intl

Sat 1/17

8:10 pm-10:59 pm

Nonstop4h 49m

Los Angeles

Tue 2/3

4:49 pm-10:59 pm

Nonstop4h 10m

$236

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 3/10

8:06 pm-12:39 pm

1 stop18h 33m

Los Angeles

Tue 3/17

8:57 pm-9:49 am

1 stop10h 52m

$237

ChicagoLos Angeles

MDW - LAX

MDWLAX

Chicago Midway

Wed 1/14

8:10 am-2:40 pm

2 stops8h 30m

Los Angeles

Sat 1/17

11:00 pm-5:00 am

Nonstop4h 00m

$251

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 3/3

7:00 am-4:35 pm

2 stops11h 35m

Los Angeles

Tue 3/10

11:50 am-11:15 pm

2 stops9h 25m

$274

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Wed 1/21

6:10 am-4:38 pm

2 stops12h 28m

Los Angeles

Sat 1/24

11:55 am-11:25 pm

2 stops9h 30m

$274

MolineLos Angeles

MLI - LAX

MLILAX

Moline Quad-City

Thu 1/15

10:47 am-3:31 pm

1 stop6h 44m

Los Angeles

Sat 1/17

12:30 am-10:12 am

1 stop7h 42m

$277

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 60 results
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Best time to book a flight from Illinois to Pasadena

Have a flexible travel schedule? Discover the best time to fly to Pasadena from Illinois with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Illinois to Pasadena

What is the cheapest month to book a flight from Illinois to Pasadena?

Currently, September is the cheapest month in which you can book a flight from Illinois to Pasadena (average of $80). Flying from Illinois to Pasadena in January is currently the most expensive (average of $122). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IL to P4S?

Find hourly flight availability from Illinois to Pasadena. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 18, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 38% on flights from Illinois to Pasadena by exploring options for tickets in the evening.

What is the cheapest day to fly from Illinois to Pasadena?

Use this chart to determine the cheapest time to fly round-trip from Illinois to Pasadena. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Illinois to Pasadena flight should consider departing on Wednesday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Illinois to Pasadena

Explore weekly flight availability from Illinois to Pasadena. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 18, 2025.

The most flights from USIL to P4S are scheduled on a Thursday (112 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (55 on average).

Related info for your journey

Find useful and relevant information for your journey from Illinois to Pasadena. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Illinois to Pasadena?

    United Airlines, Southwest, and Frontier can get you from Illinois to Pasadena in just under 4h 37m. Your travel time can differ by up to 13h 56m. Airlines will cover a distance of 1740 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Illinois to Pasadena one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $49. However, be on the lookout for offers from Spirit Airlines and American Airlines, as they are both options that can get you from Illinois to Pasadena for a low price.

  • What are the most popular routes from Illinois to Pasadena?

    The most popular route from Illinois to Pasadena is Chicago O'Hare Intl - Los Angeles. You may also consider Chicago Midway - Los Angeles or Lambert-St Louis - Los Angeles.

  • What are the most reliable airlines from Illinois to Pasadena?

    The top 3 most reliable airlines when flying from Illinois to Pasadena are Air China (87%), Japan Airlines (82%) and ANA (80%).

  • What are the cheapest flights from Illinois to Pasadena?

    While on average a flight from Illinois to Pasadena is generally $939, our data shows the cheapest flight currently is $79. When looking at the most popular route, (Chicago O'Hare Intl - Los Angeles), you can expect to pay $120 for that flight.

  • Can I find deals for flights from Illinois to Pasadena that include hotel bookings?

    Yes. In addition to deals on Illinois to Pasadena flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Illinois to Pasadena?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Illinois to Pasadena.

  • Can I find deals for business class flights from Illinois to Pasadena?

    Yes. Cheapflights offers flight deals from Illinois to Pasadena by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Illinois to Pasadena?

    Currently, September is the cheapest month in which you can book a flight from Illinois to Pasadena (average of $80). Flying from Illinois to Pasadena in January is currently the most expensive (average of $122). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top 9 airlines flying from Illinois to Pasadena

Discover the top 9 airlines that operate flights from Illinois to Pasadena. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$78Average$229FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$85Average$189FlexibilityNo cancel feeOn-time65%
DeltaCheapest$128Average$307FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$147Average$326FlexibilityNo cancel feeOn-time83%
JetBlueCheapest$153Average$306FlexibilityNo cancel feeOn-time62%
Alaska AirlinesCheapest$167Average$338FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$171Average$439FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$180Average$425FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$185Average$468FlexibilityNo cancel feeOn-time71%

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