$68+ 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Feb 3 — Feb 101
1 adult, Economy
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Find cheap flights from St. Louis to Pasadena with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.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 PasadenaExplore 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 4, 2026.
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 4, 2026.
This Kiwi.com deal was found by Cheapflights users on 1/4. 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 1/237:39 pmSTL - LAX
1 stop20h 05mFrontier
Sun 1/258:57 pmLAX - STL
2 stops13h 53mFrontier
Deal found 1/4![Frontier logo]()
$253
This Southwest deal was found by Cheapflights users on 1/4. 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.
Sat 2/215:35 pmSTL - LAX
1 stop7h 15mSouthwest
Tue 2/247:50 amLAX - STL
2 stops6h 45mSouthwest
Deal found 1/4![Southwest logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 1/2. 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 1/167:27 pmSTL - LAX
1 stop27h 05mFrontier
Mon 1/199:46 pmLAX - STL
2 stops39h 00mFrontier
Deal found 1/2![Frontier logo]()
$255
This Frontier deal was found by Cheapflights users on 1/3. 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.
Sun 1/119:46 pmSTL - LAX
1 stop12h 33mFrontier
Wed 1/147:10 amLAX - STL
1 stop5h 38mFrontier
Deal found 1/3![Frontier logo]()
$256
This CheapOair deal was found by Cheapflights users on 1/4. 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 1/119:46 pmSTL - LAX
1 stop23h 35mFrontier
Thu 1/159:46 pmLAX - STL
1 stop12h 54mFrontier
Deal found 1/4![Frontier logo]()
$257
This Kiwi.com deal was found by Cheapflights users on 1/3. 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 1/143:43 pmSTL - LAX
1 stop6h 49mFrontier
Sat 1/179:51 amLAX - STL
2 stops24h 49mFrontier
Deal found 1/3![Frontier logo]()
$258
This Kiwi.com deal was found by Cheapflights users on 1/3. 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 1/151:35 pmSTL - LAX
1 stop7h 47mFrontier
Sat 1/179:51 amLAX - STL
2 stops24h 49mFrontier
Deal found 1/3![Frontier logo]()
$259
This CheapOair deal was found by Cheapflights users on 1/4. 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 4/33:30 pmSTL - LAX
1 stop28h 33mFrontier
Tue 4/711:59 pmLAX - STL
1 stop20h 34mFrontier
Deal found 1/4![Frontier logo]()
$261
This Expedia deal was found by Cheapflights users on 1/3. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1812:14 pmSTL - LAX
1 stop7h 16mMultiple Airlines
Tue 3/3112:46 pmLAX - STL
1 stop9h 13mMultiple Airlines
Deal found 1/3![Multiple Airlines logo]()
$263
This Travelocity deal was found by Cheapflights users on 1/4. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/68:12 pmSTL - LAX
1 stop6h 05mFrontier
Tue 3/108:57 pmLAX - STL
1 stop10h 52mFrontier
Deal found 1/4![Frontier logo]()
$264
This Frontier deal was found by Cheapflights users on 1/4. 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.
Fri 1/231:03 pmSTL - LAX
1 stop6h 08mFrontier
Mon 1/261:13 pmLAX - STL
1 stop5h 37mFrontier
Deal found 1/4![Frontier logo]()
$266
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 January 4, 2026.
Most accurate provider | Justfly.com 3 stars |
|---|---|
Most trusted provider | Justfly.com 3 stars |
Round-trip from | $253 (Kiwi.com) |
One-way from | $68 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $362 |
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 4, 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 4/7
2:30 pm-7:00 pm
1 stop6h 30m
Los Angeles
Sat 4/11
7:35 am-1:05 pm
Nonstop3h 30m
$279
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 6/6
4:20 pm-9:20 pm
1 stop7h 00m
Los Angeles
Sat 6/13
5:05 am-10:45 am
Nonstop3h 40m
$284
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 2/21
8:45 pm-11:05 pm
Nonstop4h 20m
Los Angeles
Mon 3/2
5:50 am-11:30 am
Nonstop3h 40m
$284
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Mon 4/6
9:55 pm-12:05 am
Nonstop4h 10m
Los Angeles
Sat 4/11
7:35 am-1:05 pm
Nonstop3h 30m
$284
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 2/28
7:00 am-4:35 pm
2 stops11h 35m
Los Angeles
Wed 3/4
11:45 am-12:25 am
2 stops10h 40m
$294
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Wed 2/18
2:22 pm-10:45 pm
2 stops10h 23m
Los Angeles
Wed 2/25
11:45 am-12:25 am
2 stops10h 40m
$294
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 2/28
7:00 am-4:35 pm
2 stops11h 35m
Los Angeles
Sat 3/7
11:45 am-11:23 pm
2 stops9h 38m
$294
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Wed 1/28
6:40 am-4:38 pm
2 stops11h 58m
Los Angeles
Mon 2/2
11:55 am-11:25 pm
2 stops9h 30m
$304
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 6/23
6:15 pm-12:10 am
1 stop7h 55m
Los Angeles
Tue 6/30
5:00 am-10:40 am
Nonstop3h 40m
$305
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 2/14
4:45 pm-11:45 pm
1 stop9h 00m
Los Angeles
Tue 2/17
5:50 am-11:30 am
Nonstop3h 40m
$305
Showing 1-10 of 21 results
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 January 4, 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 3, 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.
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 4, 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.
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
Entertainment
7.5
Overall
8.0
Boarding
8.1
Food
7.0
Comfort
8.0
Crew
8.6
Reviews
1 / 20
8.0
ExcellentWalter,Aug 2025
OAK - SAN
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.
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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.
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 January 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$119 | Average$227 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$171 | Average$368 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$172 | Average$173 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$262 | Average$422 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$264 | Average$374 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$279 | Average$422 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$296 | Average$500 | FlexibilityNo cancel fee | On-time75% |