$142+ 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 4/18. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
May 2 — May 91
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 61 days in advance, depart on a Thursday or Wednesday and return on a Wednesday
Cheap flight deals from St. Louis to Pasadena
Cheapest
Best
Last-minute
One-way
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 April 2, 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 April 2, 2026.
This Frontier deal was found by Cheapflights users on 3/31. 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 4/169:55 pm
STL
- LAX
1 stop12h 23m
Frontier
Mon 4/201:19 pm
LAX
- STL
1 stop5h 41m
Frontier
Deal found 3/31![Frontier logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/144:59 pm
STL
- LAX
2 stops24h 00m
Frontier
Sat 4/256:15 am
LAX
- STL
1 stop11h 17m
Frontier
Deal found 3/31![Frontier logo]()
$284
This Frontier deal was found by Cheapflights users on 3/31. 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 4/138:41 am
STL
- LAX
1 stop11h 53m
Frontier
Sun 4/266:15 am
LAX
- STL
1 stop11h 06m
Frontier
Deal found 3/31![Frontier logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/188:17 pm
STL
- LAX
1 stop13h 24m
Frontier
Thu 4/236:15 am
LAX
- STL
1 stop11h 06m
Frontier
Deal found 3/31![Frontier logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 5/89:18 pm
STL
- LAX
1 stop13h 45m
Frontier
Mon 5/1111:20 pm
LAX
- STL
1 stop16h 13m
Frontier
Deal found 4/1![Frontier logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 6/108:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Mon 6/228:15 pm
LAX
- STL
2 stops16h 33m
Frontier
Deal found 3/30![Frontier logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 5/73:33 pm
STL
- LAX
2 stops19h 30m
Frontier
Sun 5/106:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 4/1![Frontier logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/188:17 pm
STL
- LAX
1 stop13h 24m
Frontier
Sun 4/2610:59 pm
LAX
- STL
2 stops46h 20m
Frontier
Deal found 3/30![Frontier logo]()
$291
This CheapOair deal was found by Cheapflights users on 3/30. 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 4/18:16 pm
STL
- LAX
1 stop16h 44m
Frontier
Thu 4/302:44 pm
LAX
- STL
1 stop26h 37m
Frontier
Deal found 3/30![Frontier logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 4/168:06 pm
STL
- LAX
1 stop6h 05m
Multiple Airlines
Mon 4/205:30 am
LAX
- STL
2 stops47h 20m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 4/158:23 pm
STL
- LAX
2 stops30h 06m
Frontier
Sat 4/186:15 am
LAX
- STL
1 stop11h 17m
Frontier
Deal found 4/1![Frontier logo]()
$294
This Expedia deal was found by Cheapflights users on 3/30. 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.
Thu 4/24:54 pm
STL
- LAX
1 stop27h 45m
Frontier
Mon 4/610:51 pm
LAX
- STL
1 stop22h 34m
Frontier
Deal found 3/30![Frontier logo]()
$295
Best flights from St. Louis to PasadenaDiscover carefully curated flight deals from St. Louis to Pasadena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 2, 2026.
Discover carefully curated flight deals from St. Louis to Pasadena that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 2, 2026.
This Southwest deal was found by Cheapflights users on 3/29. 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.
Wed 5/66:40 pm
STL
- LAX
1 stop7h 00m
Southwest
Sat 5/97:35 am
LAX
- STL
Nonstop3h 30m
Southwest
Deal found 3/29![Southwest logo]()
$383
This Delta deal was found by Cheapflights users on 3/30. 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.
Fri 5/16:45 pm
STL
- LAX
1 stop7h 02m
Delta
Tue 5/512:00 pm
LAX
- STL
2 stops9h 13m
Delta
Deal found 3/30![Delta logo]()
$434
This Southwest deal was found by Cheapflights users on 3/28. 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.
Wed 6/106:15 pm
STL
- LAX
1 stop7h 55m
Southwest
Tue 6/165:00 am
LAX
- STL
Nonstop3h 40m
Southwest
Deal found 3/28![Southwest logo]()
$383
This Southwest deal was found by Cheapflights users on 4/1. 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 5/93:00 pm
STL
- LAX
Nonstop4h 05m
Southwest
Thu 5/145:00 pm
LAX
- STL
1 stop5h 15m
Southwest
Deal found 4/1![Southwest logo]()
$394
This Southwest deal was found by Cheapflights users on 3/28. 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.
Fri 7/39:55 pm
STL
- LAX
Nonstop3h 50m
Southwest
Mon 7/65:00 pm
LAX
- STL
1 stop5h 10m
Southwest
Deal found 3/28![Southwest logo]()
$413
This Southwest deal was found by Cheapflights users on 4/1. 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.
Mon 6/292:15 pm
STL
- LAX
2 stops7h 30m
Southwest
Tue 7/78:10 am
LAX
- STL
2 stops7h 35m
Southwest
Deal found 4/1![Southwest logo]()
$433
This Southwest deal was found by Cheapflights users on 3/28. 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 5/3010:35 am
STL
- LAX
2 stops9h 05m
Southwest
Tue 6/22:20 pm
LAX
- STL
2 stops6h 55m
Southwest
Deal found 3/28![Southwest logo]()
$443
This Southwest deal was found by Cheapflights users on 3/28. 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.
Sun 7/1910:50 pm
STL
- LAX
Nonstop3h 50m
Southwest
Sun 7/2611:40 pm
LAX
- STL
1 stop7h 35m
Southwest
Deal found 3/28![Southwest logo]()
$444
This Southwest deal was found by Cheapflights users on 4/1. 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 7/309:55 pm
STL
- LAX
Nonstop3h 50m
Southwest
Mon 8/36:35 am
LAX
- STL
Nonstop3h 35m
Southwest
Deal found 4/1![Southwest logo]()
$450
This Southwest deal was found by Cheapflights users on 3/31. 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 7/115:40 am
STL
- LAX
2 stops7h 35m
Southwest
Mon 7/131:05 pm
LAX
- STL
2 stops7h 35m
Southwest
Deal found 3/31![Southwest logo]()
$464
This Southwest deal was found by Cheapflights users on 3/29. 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.
Wed 5/136:35 am
STL
- LAX
2 stops8h 45m
Southwest
Wed 5/202:20 pm
LAX
- STL
2 stops6h 55m
Southwest
Deal found 3/29![Southwest logo]()
$478
This Southwest deal was found by Cheapflights users on 3/30. 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 7/185:40 am
STL
- LAX
2 stops7h 35m
Southwest
Tue 7/216:25 am
LAX
- STL
2 stops7h 55m
Southwest
Deal found 3/30![Southwest logo]()
$495
Last-minute flights from St. Louis to PasadenaDiscover last-minute flight deals from St. Louis to Pasadena. Data last updated April 2, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Pasadena. Data last updated April 2, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 3/30. 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 4/18:16 pm
STL
- LAX
1 stop16h 44m
Frontier
Thu 4/302:44 pm
LAX
- STL
1 stop26h 37m
Frontier
Deal found 3/30![Frontier logo]()
$292
This Expedia deal was found by Cheapflights users on 3/30. 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.
Thu 4/24:54 pm
STL
- LAX
1 stop27h 45m
Frontier
Mon 4/610:51 pm
LAX
- STL
1 stop22h 34m
Frontier
Deal found 3/30![Frontier logo]()
$295
This Frontier deal was found by Cheapflights users on 3/31. 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 4/138:41 am
STL
- LAX
1 stop11h 53m
Frontier
Sun 4/266:15 am
LAX
- STL
1 stop11h 06m
Frontier
Deal found 3/31![Frontier logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/144:59 pm
STL
- LAX
2 stops24h 00m
Frontier
Sat 4/256:15 am
LAX
- STL
1 stop11h 17m
Frontier
Deal found 3/31![Frontier logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 4/158:23 pm
STL
- LAX
2 stops30h 06m
Frontier
Sat 4/186:15 am
LAX
- STL
1 stop11h 17m
Frontier
Deal found 4/1![Frontier logo]()
$294
This Frontier deal was found by Cheapflights users on 3/31. 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 4/169:55 pm
STL
- LAX
1 stop12h 23m
Frontier
Mon 4/201:19 pm
LAX
- STL
1 stop5h 41m
Frontier
Deal found 3/31![Frontier logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 3/29. 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 4/168:06 pm
STL
- LAX
1 stop6h 05m
Multiple Airlines
Mon 4/205:30 am
LAX
- STL
2 stops47h 20m
Multiple Airlines
Deal found 3/29![Multiple Airlines logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/178:06 pm
STL
- LAX
1 stop17h 23m
Frontier
Tue 4/211:52 pm
LAX
- STL
1 stop14h 58m
Frontier
Deal found 3/31![Frontier logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/188:17 pm
STL
- LAX
1 stop13h 24m
Frontier
Thu 4/236:15 am
LAX
- STL
1 stop11h 06m
Frontier
Deal found 3/31![Frontier logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 3/30. 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 4/188:17 pm
STL
- LAX
1 stop13h 24m
Frontier
Sun 4/2610:59 pm
LAX
- STL
2 stops46h 20m
Frontier
Deal found 3/30![Frontier logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 5/73:33 pm
STL
- LAX
2 stops19h 30m
Frontier
Sun 5/106:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 4/1![Frontier logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 4/1. 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 5/89:18 pm
STL
- LAX
1 stop13h 45m
Frontier
Mon 5/1111:20 pm
LAX
- STL
1 stop16h 13m
Frontier
Deal found 4/1![Frontier logo]()
$288
One-way flights from St. Louis to PasadenaSearch for one-way flight options from St. Louis to Pasadena. Find affordable one-way fares based on user searches. Data last updated April 2, 2026.
Search for one-way flight options from St. Louis to Pasadena. Find affordable one-way fares based on user searches. Data last updated April 2, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/188:17 pm
STL
- LAX
2 stops15h 43m
Frontier
Deal found 3/31![Frontier logo]()
$142
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/278:08 pm
STL
- LAX
2 stops15h 40m
Frontier
Deal found 3/31![Frontier logo]()
$143
This Frontier deal was found by Cheapflights users on 3/30. 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 5/18:06 pm
STL
- LAX
1 stop6h 05m
Frontier
Deal found 3/30![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/167:08 pm
STL
- LAX
2 stops15h 55m
Frontier
Deal found 3/31![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/158:23 pm
STL
- LAX
2 stops30h 06m
Frontier
Deal found 3/31![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/28:17 pm
STL
- LAX
2 stops18h 19m
Frontier
Deal found 3/31![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 5/17:01 pm
STL
- LAX
3 stops23h 21m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 3/30. 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.
Sun 4/1911:16 am
STL
- LAX
2 stops36h 48m
Frontier
Deal found 3/30![Frontier logo]()
$152
This ezTravel 易遊網 deal was found by Cheapflights users on 4/1. 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 ezTravel 易遊網 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/189:18 pm
STL
- LAX
1 stop13h 45m
Frontier
Deal found 4/1![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 3/31. 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 4/3011:21 am
STL
- LAX
2 stops14h 32m
Multiple Airlines
Deal found 3/31![Multiple Airlines logo]()
$155
This CheapOair deal was found by Cheapflights users on 3/31. 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 4/284:59 pm
STL
- LAX
1 stop28h 07m
Frontier
Deal found 3/31![Frontier logo]()
$157
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 April 2, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $281 (Frontier) |
One-way from | $142 (Kiwi.com) |
Popular in | March |
Cheapest in | September |
Average price | $391 |
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 April 2, 2026.
Use the filters below to find and compare flights from St. Louis to Pasadena that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Wed 5/6
6:40 pm-11:40 pm
1 stop7h 00m
Los Angeles
Sat 5/9
7:35 am-1:05 pm
Nonstop3h 30m
$383
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Wed 6/10
6:15 pm-12:10 am
1 stop7h 55m
Los Angeles
Tue 6/16
5:00 am-10:40 am
Nonstop3h 40m
$383
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 5/9
3:00 pm-5:05 pm
Nonstop4h 05m
Los Angeles
Thu 5/14
5:00 pm-12:15 am
1 stop5h 15m
$394
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 7/3
9:55 pm-11:45 pm
Nonstop3h 50m
Los Angeles
Mon 7/6
5:00 pm-12:10 am
1 stop5h 10m
$413
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Mon 6/29
2:15 pm-7:45 pm
2 stops7h 30m
Los Angeles
Tue 7/7
8:10 am-5:45 pm
2 stops7h 35m
$433
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 5/1
6:45 pm-11:47 pm
1 stop7h 02m
Los Angeles
Tue 5/5
12:00 pm-11:13 pm
2 stops9h 13m
$434
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 5/30
10:35 am-5:40 pm
2 stops9h 05m
Los Angeles
Tue 6/2
2:20 pm-11:15 pm
2 stops6h 55m
$443
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sun 7/19
10:50 pm-12:40 am
Nonstop3h 50m
Los Angeles
Sun 7/26
11:40 pm-9:15 am
1 stop7h 35m
$444
Quickest round-trip
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Thu 7/30
9:55 pm-11:45 pm
Nonstop3h 50m
Los Angeles
Mon 8/3
6:35 am-12:10 pm
Nonstop3h 35m
$450
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 7/11
5:40 am-11:15 am
2 stops7h 35m
Los Angeles
Mon 7/13
1:05 pm-10:40 pm
2 stops7h 35m
$464
Showing 1-10 of 22 resultsSorted by cheapest first
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.
STL-LAX
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
STL-P4S
STL-LAX
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 March 13, 2026.
The best time to book flights from St. Louis to Pasadena is 61 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 $250). 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 April 2, 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 15% 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 February 17, 2026.
Travelers seeking maximum savings on their St. Louis to Pasadena flight should consider departing on Thursday afternoons 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 April 2, 2026.
The most flights from STL to P4S are scheduled on a Monday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 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 April 2, 2026.
Get a feel of what it's like to fly with Southwest,Delta, andUnited 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
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Entertainment
7.5
Crew
8.6
Comfort
8.0
Food
7.0
Boarding
8.1
Overall
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
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.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from St. Louis
Popular flights
Top destinations
Alternative routes for St. Louis to Pasadena
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Pasadena by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Pasadena by cabin class
Find flights from St. Louis to Pasadena, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Pasadena flights
Browse other St. Louis and Pasadena flight options. Last updated on April 2, 2026.
Other flights from St. Louis
Browse through other flights departing from St. Louis. Flights are based on user searches made on Cheapflights and were last updated on April 2, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
St. Louis to Pasadena flights
Consider these flights traveling from St. Louis to Pasadena.
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 April 2, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$128 | Average$229 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$172 | Average$173 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$228 | Average$368 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$260 | Average$425 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$273 | Average$422 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$276 | Average$401 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$304 | Average$360 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$347 | Average$531 | FlexibilityNo cancel fee | On-time75% |