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Pasadena

$66+ 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 2/14. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Feb 18 — Feb 251
Wed 2/18
Wed 2/25
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 Thursday or Wednesday and return on a Friday

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 January 19, 2026.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$221
(CheapOair)

One-way from

$66
(Kiwi.com)

Popular in

March

Cheapest in

September

Average price

$362
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.
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From Lambert-St Louis to Pasadena
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One-way flight from Lambert-St Louis to Pasadena
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Highest demand for flights based on searches. 3% potential increase in price ($12 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 19, 2026.

This CheapOair deal was found by Cheapflights users on 1/16. 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.
Wed 3/45:18 pm
STL
-
LAX
1 stop22h 24m
Frontier
Mon 3/910:43 pm
LAX
-
STL
1 stop22h 36m
Frontier
Deal found 1/16$221
This Frontier deal was found by Cheapflights users on 1/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/283:46 pm
STL
-
LAX
1 stop9h 45m
Frontier
Sat 2/146:20 am
LAX
-
STL
1 stop5h 36m
Frontier
Deal found 1/16$222
This CheapOair deal was found by Cheapflights users on 1/18. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/283:46 pm
STL
-
LAX
1 stop9h 45m
Frontier
Tue 2/31:56 pm
LAX
-
STL
1 stop22h 50m
Frontier
Deal found 1/18$223
This Kiwi.com deal was found by Cheapflights users on 1/17. 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.
Fri 2/2710:11 pm
STL
-
LAX
1 stop12h 04m
Multiple Airlines
Sun 3/19:09 pm
LAX
-
STL
2 stops20h 43m
Multiple Airlines
Deal found 1/17$224
This Kiwi.com deal was found by Cheapflights users on 1/17. 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.
Sat 2/142:51 pm
STL
-
LAX
1 stop18h 55m
Multiple Airlines
Mon 2/1611:59 pm
LAX
-
STL
2 stops28h 52m
Multiple Airlines
Deal found 1/17$225
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
Fri 3/68:12 pm
STL
-
LAX
1 stop30h 05m
Frontier
Wed 3/1110:15 pm
LAX
-
STL
1 stop21h 47m
Frontier
Deal found 1/16$228
This Kiwi.com deal was found by Cheapflights users on 1/16. 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.
Fri 2/69:43 pm
STL
-
LAX
1 stop12h 39m
Multiple Airlines
Sun 2/811:59 pm
LAX
-
STL
2 stops52h 52m
Multiple Airlines
Deal found 1/16$230
This Kiwi.com deal was found by Cheapflights users on 1/17. 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 3/188:12 pm
STL
-
LAX
1 stop6h 05m
Frontier
Mon 3/2310:33 pm
LAX
-
STL
2 stops33h 16m
Frontier
Deal found 1/17$231
This Kiwi.com deal was found by Cheapflights users on 1/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/2010:11 pm
STL
-
LAX
1 stop12h 04m
Multiple Airlines
Sun 2/229:21 pm
LAX
-
STL
1 stop20h 41m
Multiple Airlines
Deal found 1/18$232
This Frontier deal was found by Cheapflights users on 1/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/282:51 pm
STL
-
LAX
1 stop11h 39m
Frontier
Sun 3/88:57 pm
LAX
-
STL
1 stop10h 52m
Frontier
Deal found 1/17$233
This Kiwi.com deal was found by Cheapflights users on 1/18. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:11 pm
STL
-
LAX
1 stop10h 38m
Frontier
Thu 2/269:16 pm
LAX
-
STL
1 stop22h 10m
Frontier
Deal found 1/18$235
This Frontier deal was found by Cheapflights users on 1/18. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/21:40 pm
STL
-
LAX
1 stop12h 50m
Frontier
Fri 2/66:30 am
LAX
-
STL
1 stop10h 14m
Frontier
Deal found 1/18$236

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 January 19, 2026.
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

5:40 am-4:10 pm

1 stop8h 30m

$273

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 2/21

8:45 pm-11:05 pm

Nonstop4h 20m

Los Angeles

Mon 2/23

5:50 am-11:30 am

Nonstop3h 40m

$278

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 2/21

2:20 pm-9:10 pm

2 stops8h 50m

Los Angeles

Sat 2/28

8:35 am-6:00 pm

2 stops7h 25m

$287

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Wed 2/25

6:10 am-4:35 pm

2 stops12h 25m

Los Angeles

Sat 2/28

9:56 am-9:38 pm

2 stops9h 42m

$294

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 2/17

6:10 am-4:35 pm

2 stops12h 25m

Los Angeles

Wed 2/25

11:45 am-11:23 pm

2 stops9h 38m

$294

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 2/17

6:10 am-4:35 pm

2 stops12h 25m

Los Angeles

Tue 2/24

11:45 am-11:23 pm

2 stops9h 38m

$294

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Mon 3/9

9:55 pm-12:05 am

Nonstop4h 10m

Los Angeles

Sat 3/14

4:05 pm-12:05 am

1 stop6h 00m

$322

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 3/7

8:12 pm-12:17 am

1 stop6h 05m

$110

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 5/16

1:30 pm-9:25 pm

1 stop9h 55m

$116

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 4/14

3:50 pm-10:55 pm

1 stop9h 05m

$129

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/15

Showing 1-10 of 18 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 January 16, 2026.

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 January 19, 2026.

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 January 17, 2026.

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 January 19, 2026.

The most flights from STL to P4S are scheduled on a Monday (10 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (9 on average).

How much does it cost to fly round-trip from St. Louis to Pasadena?

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 January 19, 2026.
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
4,262 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

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
4,262 reviews
Southwest
8.0
Very good
4,262 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

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
8,075 reviews
Southwest
8.0
Very good
4,262 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

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
9,176 reviews
Southwest
8.0
Very good
4,262 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

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
11,160 reviews
Southwest
8.0
Very good
4,262 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

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
5.7
Fair
3,058 reviews
Southwest
8.0
Very good
4,262 reviews

Crew

8.6

Food

7.0

Overall

8.0

Boarding

8.1

Comfort

8.0

Entertainment

7.5

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 9 daily outbound flights to Pasadena from 8 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 or Delta to get the fastest option. Airlines will cover a distance of 1588 mi. This flight may include one or multiple stops.

  • 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 ($75), American Airlines ($138), 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: Malaysia Airlines (82%), Japan Airlines (71%), Air Tahiti Nui( 71%).

  • 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 $595. The most popular route, (Lambert-St Louis - Los Angeles), can usually be booked for $130.

  • 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 8 airlines flying from St. Louis to Pasadena

Discover the top 8 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 January 19, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$120Average$224FlexibilityNo cancel feeOn-time62%
DeltaCheapest$171Average$369FlexibilityNo cancel feeOn-timeN/A
Spirit AirlinesCheapest$172Average$173FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$201Average$416FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$228Average$370FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$258Average$420FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$296Average$500FlexibilityNo cancel feeOn-time75%
JetBlueCheapest$304Average$360FlexibilityNo cancel feeOn-time62%

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