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Pasadena

$63+ 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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheapflights Tip: The best prices from Lambert-St Louis to Pasadena are usually found in September or October, booked 58 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap 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 December 28, 2025.

This Delta deal was found by Cheapflights users on 12/26. 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 12/312:18 pmSTL - LAX
1 stop9h 31mDelta
Thu 1/11:36 pmLAX - STL
1 stop5h 58mDelta
Deal found 12/26$315
This CheapOair deal was found by Cheapflights users on 12/25. 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.
Tue 12/3010:10 pmSTL - LAX
1 stop24h 21mFrontier
Mon 1/59:15 amLAX - STL
1 stop8h 52mFrontier
Deal found 12/25$354
This Delta deal was found by Cheapflights users on 12/26. 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 12/312:18 pmSTL - LAX
1 stop6h 30mDelta
Sat 1/311:15 amLAX - STL
1 stop8h 19mDelta
Deal found 12/26$355
This CheapOair deal was found by Cheapflights users on 12/25. 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.
Sun 12/2810:10 pmSTL - LAX
1 stop16h 06mFrontier
Sat 1/173:32 pmLAX - STL
1 stop27h 42mFrontier
Deal found 12/25$363
This Frontier deal was found by Cheapflights users on 12/26. 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.
Mon 12/297:43 pmSTL - LAX
1 stop6h 47mFrontier
Mon 1/59:15 amLAX - STL
1 stop8h 52mFrontier
Deal found 12/26$383
This CheapOair deal was found by Cheapflights users on 12/25. 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.
Fri 12/267:43 pmSTL - LAX
1 stop6h 47mFrontier
Thu 1/13:58 pmLAX - STL
1 stop16h 04mFrontier
Deal found 12/25$389
This CheapOair deal was found by Cheapflights users on 12/26. 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.
Sun 12/2810:10 pmSTL - LAX
1 stop24h 21mFrontier
Sun 1/411:59 pmLAX - STL
1 stop20h 34mFrontier
Deal found 12/26$408
This Delta deal was found by Cheapflights users on 12/27. 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.
Sat 12/272:18 pmSTL - LAX
1 stop9h 31mDelta
Mon 12/2911:55 amLAX - STL
1 stop8h 21mDelta
Deal found 12/27$417
This CheapOair deal was found by Cheapflights users on 12/26. 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.
Tue 12/3010:10 pmSTL - LAX
1 stop24h 21mFrontier
Fri 1/29:15 amLAX - STL
1 stop8h 32mFrontier
Deal found 12/26$418
This American Airlines deal was found by Cheapflights users on 12/25. 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.
Fri 12/268:00 amSTL - LAX
1 stop6h 17mAmerican Airlines
Thu 1/16:16 pmLAX - STL
Nonstop3h 35mAmerican Airlines
Deal found 12/25$429

Find 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 December 28, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$245
(Kiwi.com)

One-way from

$63
(Trip.com)

Popular in

March

Cheapest in

September

Average price

$422
Provider with most accurate pricing for Lambert-St Louis-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Los Angeles flights.
Search Deals
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. 2% potential increase in price ($11 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 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 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 December 28, 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

Tue 2/17

7:45 pm-10:00 pm

Nonstop4h 15m

Los Angeles

Sat 2/21

5:15 am-10:40 am

Nonstop3h 25m

$269

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 1/24

5:30 am-9:50 am

1 stop6h 20m

Los Angeles

Sat 1/31

11:25 am-5:00 pm

Nonstop3h 35m

$284

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sun 1/18

2:35 pm-9:10 pm

1 stop8h 35m

Los Angeles

Tue 1/27

11:35 am-5:10 pm

Nonstop3h 35m

$305

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 1/31

7:00 am-12:05 pm

1 stop7h 05m

Los Angeles

Tue 2/3

11:35 am-5:10 pm

Nonstop3h 35m

$305

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 1/20

2:20 pm-9:25 pm

1 stop9h 05m

Los Angeles

Tue 1/27

11:35 am-5:10 pm

Nonstop3h 35m

$305

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Wed 5/27

8:50 am-1:03 pm

1 stop6h 13m

Los Angeles

Tue 6/2

12:45 am-8:40 am

1 stop5h 55m

$315

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 2/17

7:00 am-12:26 pm

1 stop7h 26m

Los Angeles

Tue 2/24

11:55 pm-10:43 am

1 stop8h 48m

$315

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 5/30

5:00 pm-9:55 pm

1 stop6h 55m

Los Angeles

Tue 6/2

12:45 am-8:40 am

1 stop5h 55m

$315

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 5/26

6:30 am-10:57 am

1 stop6h 27m

Los Angeles

Wed 6/3

9:50 am-6:00 pm

1 stop6h 10m

$315

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 4/4

3:05 pm-8:22 pm

1 stop7h 17m

Los Angeles

Wed 4/15

6:00 am-1:25 pm

1 stop5h 25m

$315

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 21 results
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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 December 26, 2025.

The best time to book flights from St. Louis to Pasadena is 58 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, November is the cheapest month in which you can book a flight from St. Louis to Pasadena (average of $67). Flying from St. Louis to Pasadena in June is currently the most expensive (average of $248). 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 December 28, 2025.

A simple way to save on the total cost of your ticket is to fly from St. Louis to Pasadena in the evening. If you’re flexible enough to do this you can expect to save up to 46% on your trip compared to booking a flight in the morning.

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 December 27, 2025.

Travelers seeking maximum savings on their St. Louis to Pasadena flight should consider departing on Wednesday evenings when fares are most often at their lowest. Monday mornings 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 December 28, 2025.

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

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 December 28, 2025.
Get a feel of what it's like to fly with Southwest, Delta, and United Airlines from St. Louis to Pasadena by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Southwest
8.0
Very good
4,256 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Delta
7.9
Good
8,019 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
United Airlines
7.4
Good
9,113 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
American Airlines
7.2
Good
11,072 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.
Frontier
5.8
Fair
3,065 reviews
Southwest
8.0
Very good
4,256 reviews

Entertainment

7.5

Overall

8.0

Food

7.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Reviews

1 / 20
8.0
Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

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 10 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 17 times in the past calendar month.

  • How long is the flight from St. Louis to Pasadena?

    There are many flights that can get you from St. Louis to Pasadena in 4h 15m. Fly via Southwest to get the fastest option. Airlines will cover a distance of 1588 mi. All flights are typically nonstop.

  • 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 ($69), American Airlines ($139), and Southwest ($148).

  • 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: Japan Airlines (75%), Air Tahiti Nui (75%), Alaska Airlines( 75%).

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

    The cheapest flight price from St. Louis to Pasadena is $187. On average you can expect to pay $489. The most popular route, (Lambert-St Louis - Los Angeles), can usually be booked for $133.

  • 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, November is the cheapest month in which you can book a flight from St. Louis to Pasadena (average of $67). Flying from St. Louis to Pasadena in June is currently the most expensive (average of $248). 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$119Average$226FlexibilityNo cancel feeOn-time62%
DeltaCheapest$171Average$371FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$172Average$173FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$259Average$423FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$264Average$378FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$279Average$421FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$296Average$531FlexibilityNo cancel feeOn-time75%

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