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Pasadena

$105+ Cheap flights from St. Louis (STL) 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 6/21. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Jun 23 — Jun 301
Mon 6/23
Mon 6/30
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Pasadena are usually found in September or August, booked 89 days in advance, depart on a Wednesday or Thursday and return on a Tuesday

Cheap flight deals from St. Louis to Pasadena

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

Round-trip from

$242
(CheapOair)

One-way from

$105
(CheapOair)

Popular in

March

Cheapest in

September

Average price

$425
From Lambert-St Louis to Pasadena
Search Deals
One-way flight from Lambert-St Louis to Pasadena
Search Deals
Highest demand for flights based on searches. 4% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from St. Louis to Pasadena

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

This CheapOair deal was found by Cheapflights users on 6/16. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/252:27 pmSTL - LAX
1 stop10h 24mSpirit Airlines
Thu 8/2810:31 pmLAX - STL
1 stop13h 01mSpirit Airlines
Deal found 6/16$242
This Booking.com deal was found by Cheapflights users on 6/15. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/132:27 pmSTL - LAX
1 stop23h 41mMultiple Airlines
Sun 7/2010:10 pmLAX - STL
1 stop9h 42mMultiple Airlines
Deal found 6/15$245
This American Airlines deal was found by Cheapflights users on 6/18. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/46:20 amSTL - LAX
Nonstop4h 03mAmerican Airlines
Sat 10/115:17 pmLAX - STL
Nonstop3h 36mAmerican Airlines
Deal found 6/18$295
This Southwest deal was found by Cheapflights users on 6/16. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/236:45 pmSTL - LAX
1 stop7h 35mSouthwest
Mon 10/275:30 amLAX - STL
Nonstop3h 40mSouthwest
Deal found 6/16$307
This Alaska Airlines deal was found by Cheapflights users on 6/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/93:35 pmSTL - LAX
1 stop9h 13mAlaska Airlines
Tue 9/237:00 amLAX - STL
1 stop8h 34mAlaska Airlines
Deal found 6/16$314
This Delta deal was found by Cheapflights users on 6/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/208:46 amSTL - LAX
1 stop6h 04mDelta
Thu 9/411:35 pmLAX - STL
1 stop9h 02mDelta
Deal found 6/16$317
This Booking.com deal was found by Cheapflights users on 6/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/262:36 pmSTL - LAX
1 stop9h 04mFrontier
Tue 7/16:15 amLAX - STL
1 stop24h 57mFrontier
Deal found 6/16$339
This United Airlines deal was found by Cheapflights users on 6/16. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/225:15 amSTL - LAX
1 stop6h 17mUnited Airlines
Sat 8/2312:56 amLAX - STL
1 stop7h 05mUnited Airlines
Deal found 6/16$341

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis 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 June 18, 2025.
Use the filters below to find and compare flights from St. Louis to Pasadena that are best for you.

Fly from

St. Louis

Fly to

Pasadena

Route

Depart

Return

Price

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Mon 8/25

2:27 pm-10:51 pm

1 stop10h 24m

Los Angeles

Thu 8/28

10:31 pm-1:32 pm

1 stop13h 01m

$242

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sun 7/13

2:27 pm-12:08 pm

1 stop23h 41m

Los Angeles

Sun 7/20

10:10 pm-9:52 am

1 stop9h 42m

$245

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 7/19

6:14 am-8:37 am

Nonstop4h 23m

Los Angeles

Sat 7/26

5:42 pm-11:30 pm

Nonstop3h 48m

$295

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 9/9

3:35 pm-10:48 pm

1 stop9h 13m

Los Angeles

Tue 9/23

7:00 am-5:34 pm

1 stop8h 34m

$314

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Thu 7/3

2:36 pm-9:40 pm

1 stop9h 04m

Los Angeles

Sun 7/6

6:15 am-9:11 am

1 stop24h 56m

$316

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Wed 8/20

8:46 am-12:50 pm

1 stop6h 04m

Los Angeles

Thu 9/4

11:35 pm-10:37 am

1 stop9h 02m

$317

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sun 9/14

6:25 am-8:20 am

Nonstop3h 55m

Los Angeles

Wed 9/17

4:30 pm-10:15 pm

Nonstop3h 45m

$323

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Fri 8/22

5:15 am-9:32 am

1 stop6h 17m

Los Angeles

Sat 8/23

12:56 am-10:01 am

1 stop7h 05m

$341

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 6/21

2:52 pm-9:25 pm

1 stop8h 33m

$105

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Mon 7/21

10:47 am-8:45 am

1 stop23h 58m

$110

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/17

Showing 1-10 of 17 results
1
2

Best time to book a flight from St. Louis to Pasadena

Have a flexible travel schedule? Discover the best time to fly to Pasadena from St. Louis 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 St. Louis to Pasadena

How far ahead should I book a flight from St. Louis to Pasadena?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Pasadena. Price data was last updated on June 13, 2025.

The best time to book flights from St. Louis to Pasadena is 89 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from St. Louis to Pasadena?

Currently, January is the cheapest month in which you can book a flight from St. Louis to Pasadena (average of $246). Flying from St. Louis to Pasadena in March is currently the most expensive (average of $327). 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 STL to P4S?

Find hourly flight availability from St. Louis 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 June 18, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from St. Louis to Pasadena as you normally would.

What is the cheapest day to fly from St. Louis to Pasadena?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Pasadena. Price data was last updated on June 15, 2025.

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

Weekly flight availability from St. Louis to Pasadena

Explore weekly flight availability from St. Louis 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 June 18, 2025.

The most flights from STL to P4S are scheduled on a Monday (11 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).

Rainfall in Pasadena by month

Plan your trip to Pasadena by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Pasadena ranges from 0.0 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. July is typically the driest time to visit Pasadena when rainfall is around 0.0 in.

Temperature in Pasadena by month

Plan your trip to Pasadena by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Pasadena, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).

Reviews of airlines servicing Pasadena

Get insights into the airlines that provide service to Pasadena. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Pasadena. Reviews last updated June 18, 2025.
Get a feel of what it's like to fly with Alaska Airlines, Southwest and Delta from St. Louis to Pasadena by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,280 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,964 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,810 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Crew

8.5

Entertainment

7.1

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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

  • What airport do you fly from for flights from St. Louis to Pasadena?

    Located just 12.7 mi from the city center, Lambert-St Louis is the airport most travelers will use when flying to Pasadena from St. Louis. Booking flights from Lambert-St Louis (STL) to Pasadena should be relatively easy as there are 9 daily outbound flights to Pasadena from 7 different airlines.

  • How popular is this St. Louis to Pasadena flight route?

    Flights from Lambert-St Louis to Pasadena have been viewed 9 times in the past calendar month.

  • What are the cheapest airlines to fly from St. Louis to Pasadena one-way?

    The cheapest airlines for a one-way flight from St. Louis to Pasadena are Frontier ($105), Spirit Airlines ($110), and Sun Country Air ($133).

  • What are the most reliable airlines from St. Louis to Pasadena?

    Before booking your flight to Pasadena from St. Louis, check out the most reliable airlines to get you to your destination on time: Alaska Airlines (85%), American Airlines (82%), Japan Airlines( 79%).

  • What are the cheapest flights from St. Louis to Pasadena?

    The cheapest flight price from St. Louis to Pasadena is $160. On average you can expect to pay $699. The most popular route, (Lambert-St Louis - Los Angeles), can usually be booked for $203.

  • Can I find deals for flights from St. Louis to Pasadena that include hotel bookings?

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

  • How can I find direct flights from St. Louis to Pasadena?

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

  • Can I find deals for business class flights from St. Louis to Pasadena?

    Yes. Cheapflights offers flight deals from St. Louis 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 St. Louis to Pasadena?

    Currently, January is the cheapest month in which you can book a flight from St. Louis to Pasadena (average of $246). Flying from St. Louis to Pasadena in March is currently the most expensive (average of $327). 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.

See more FAQs

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Alternative routes for St. Louis to Pasadena

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Top 7 airlines flying from St. Louis to Pasadena

Discover the top 7 airlines that operate flights from St. Louis 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 June 18, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$56Average$260FlexibilityNo cancel feeOn-time65%
FrontierCheapest$94Average$219FlexibilityNo cancel feeOn-time62%
DeltaCheapest$181Average$418FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$250Average$401FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$281Average$446FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$289Average$440FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$296Average$562FlexibilityNo cancel feeOn-time75%

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