$144+ Cheap flights from St. Louis (STL) to Riverside, 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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
May 11 — May 181
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Riverside 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 Riverside are usually found in September or October, booked 58 days in advance, depart on a Thursday or Wednesday and return on a Wednesday
Cheap flight deals from St. Louis to Riverside
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Best
Last-minute
One-way
Cheapest flights from St. Louis to RiversideExplore the most affordable flight options available from St. Louis to Riverside. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2026.
Explore the most affordable flight options available from St. Louis to Riverside. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 6/68:08 pm
STL
- LAX
1 stop6h 08m
Frontier
Mon 6/810:05 pm
LAX
- STL
2 stops43h 18m
Frontier
Deal found 4/7![Frontier logo]()
$278
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 5/126:51 pm
STL
- LAX
1 stop16h 12m
Frontier
Thu 5/148:59 pm
LAX
- STL
1 stop20h 24m
Frontier
Deal found 4/7![Frontier logo]()
$279
This Frontier deal was found by Cheapflights users on 4/11. 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 4/239:55 pm
STL
- LAX
1 stop12h 23m
Frontier
Sun 4/266:15 am
LAX
- STL
1 stop11h 06m
Frontier
Deal found 4/11![Frontier logo]()
$280
This CheapOair deal was found by Cheapflights users on 4/8. 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 4/294:59 pm
STL
- LAX
1 stop28h 07m
Frontier
Tue 5/1211:20 pm
LAX
- STL
1 stop7h 35m
Frontier
Deal found 4/8![Frontier logo]()
$281
This Frontier deal was found by Cheapflights users on 4/8. 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 4/248:06 pm
STL
- LAX
1 stop6h 05m
Frontier
Mon 4/276:15 am
LAX
- STL
1 stop11h 17m
Frontier
Deal found 4/8![Frontier logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 5/159:18 pm
STL
- LAX
1 stop13h 45m
Frontier
Fri 8/148:15 pm
LAX
- STL
2 stops25h 59m
Frontier
Deal found 4/8![Frontier logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 4/239:55 pm
STL
- LAX
1 stop12h 23m
Multiple Airlines
Sat 4/256:18 pm
LAX
- STL
2 stops23h 03m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$285
This Kiwi.com deal was found by Cheapflights users on 4/9. 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 6/36:51 pm
STL
- LAX
1 stop16h 12m
Frontier
Sun 6/712:49 am
LAX
- STL
2 stops21h 08m
Frontier
Deal found 4/9![Frontier logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 5/126:51 pm
STL
- LAX
1 stop16h 12m
Multiple Airlines
Sat 5/1611:59 pm
LAX
- STL
1 stop12h 49m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$287
This Kiwi.com deal was found by Cheapflights users on 4/10. 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 5/97:08 pm
STL
- LAX
1 stop15h 43m
Frontier
Sat 5/165:45 am
LAX
- STL
1 stop10h 19m
Frontier
Deal found 4/10![Frontier logo]()
$288
This Trip.com deal was found by Cheapflights users on 4/7. 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 Trip.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 stop6h 05m
Frontier
Tue 4/219:04 pm
LAX
- STL
1 stop24h 15m
Frontier
Deal found 4/7![Frontier logo]()
$289
This Frontier deal was found by Cheapflights users on 4/9. 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 7/138:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Thu 7/166:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 4/9![Frontier logo]()
$290
Best flights from St. Louis to RiversideDiscover carefully curated flight deals from St. Louis to Riverside that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 11, 2026.
Discover carefully curated flight deals from St. Louis to Riverside that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 11, 2026.
This Southwest deal was found by Cheapflights users on 4/9. 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 6/59:55 pm
STL
- LAX
Nonstop3h 50m
Southwest
Mon 6/85:00 pm
LAX
- STL
1 stop5h 10m
Southwest
Deal found 4/9![Southwest logo]()
$413
This Delta deal was found by Cheapflights users on 4/10. 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 5/16:20 am
STL
- LAX
1 stop6h 55m
Delta
Tue 5/512:00 pm
LAX
- STL
2 stops9h 13m
Delta
Deal found 4/10![Delta logo]()
$481
This Southwest deal was found by Cheapflights users on 4/9. 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.
Tue 5/58:30 am
STL
- LAX
1 stop6h 30m
Southwest
Mon 5/115:00 am
LAX
- STL
Nonstop3h 35m
Southwest
Deal found 4/9![Southwest logo]()
$420
This Southwest deal was found by Cheapflights users on 4/6. 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 5/49:40 pm
STL
- LAX
Nonstop4h 05m
Southwest
Mon 5/115:00 am
LAX
- STL
Nonstop3h 35m
Southwest
Deal found 4/6![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 4/10. 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 5/96:15 am
STL
- LAX
2 stops7h 55m
Southwest
Sat 5/163:20 pm
LAX
- STL
1 stop5h 40m
Southwest
Deal found 4/10![Southwest logo]()
$430
This Southwest deal was found by Cheapflights users on 4/9. 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 5/1411:30 pm
LAX
- STL
1 stop6h 25m
Southwest
Deal found 4/9![Southwest logo]()
$430
This Southwest deal was found by Cheapflights users on 4/6. 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 6/710:50 pm
STL
- LAX
Nonstop3h 50m
Southwest
Sun 6/145:40 am
LAX
- STL
1 stop5h 30m
Southwest
Deal found 4/6![Southwest logo]()
$460
This Southwest deal was found by Cheapflights users on 4/10. 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 4/308:30 am
STL
- LAX
Nonstop4h 05m
Southwest
Mon 7/277:10 am
LAX
- STL
1 stop5h 40m
Southwest
Deal found 4/10![Southwest logo]()
$460
This Southwest deal was found by Cheapflights users on 4/11. 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 6/189:55 pm
STL
- LAX
Nonstop3h 50m
Southwest
Sun 6/2111:40 pm
LAX
- STL
1 stop7h 35m
Southwest
Deal found 4/11![Southwest logo]()
$543
Last-minute flights from St. Louis to RiversideDiscover last-minute flight deals from St. Louis to Riverside. Data last updated April 11, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Riverside. Data last updated April 11, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 4/6. 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 4/108:41 am
STL
- LAX
1 stop11h 58m
Frontier
Wed 4/2211:00 pm
LAX
- STL
1 stop9h 30m
Frontier
Deal found 4/6![Frontier logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 4/6. 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
Frontier
Mon 4/2011:36 pm
LAX
- STL
2 stops29h 14m
Frontier
Deal found 4/6![Frontier logo]()
$292
This Trip.com deal was found by Cheapflights users on 4/7. 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 Trip.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 stop6h 05m
Frontier
Tue 4/219:04 pm
LAX
- STL
1 stop24h 15m
Frontier
Deal found 4/7![Frontier logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 4/6. 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 stop6h 05m
Frontier
Mon 4/2011:36 pm
LAX
- STL
2 stops29h 14m
Frontier
Deal found 4/6![Frontier logo]()
$291
This Frontier deal was found by Cheapflights users on 4/11. 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 4/239:55 pm
STL
- LAX
1 stop12h 23m
Frontier
Sun 4/266:15 am
LAX
- STL
1 stop11h 06m
Frontier
Deal found 4/11![Frontier logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 4/239:55 pm
STL
- LAX
1 stop12h 23m
Multiple Airlines
Sat 4/256:18 pm
LAX
- STL
2 stops23h 03m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$285
This Frontier deal was found by Cheapflights users on 4/8. 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 4/248:06 pm
STL
- LAX
1 stop6h 05m
Frontier
Mon 4/276:15 am
LAX
- STL
1 stop11h 17m
Frontier
Deal found 4/8![Frontier logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 4/6. 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 4/249:58 pm
STL
- LAX
1 stop20h 17m
Frontier
Tue 4/281:52 pm
LAX
- STL
1 stop14h 58m
Frontier
Deal found 4/6![Frontier logo]()
$283
This CheapOair deal was found by Cheapflights users on 4/8. 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 4/294:59 pm
STL
- LAX
1 stop28h 07m
Frontier
Tue 5/1211:20 pm
LAX
- STL
1 stop7h 35m
Frontier
Deal found 4/8![Frontier logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 4/10. 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 5/97:08 pm
STL
- LAX
1 stop15h 43m
Frontier
Sat 5/165:45 am
LAX
- STL
1 stop10h 19m
Frontier
Deal found 4/10![Frontier logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 5/126:51 pm
STL
- LAX
1 stop16h 12m
Frontier
Thu 5/148:59 pm
LAX
- STL
1 stop20h 24m
Frontier
Deal found 4/7![Frontier logo]()
$279
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 5/126:51 pm
STL
- LAX
1 stop16h 12m
Multiple Airlines
Sat 5/1611:59 pm
LAX
- STL
1 stop12h 49m
Multiple Airlines
Deal found 4/7![Multiple Airlines logo]()
$287
One-way flights from St. Louis to RiversideSearch for one-way flight options from St. Louis to Riverside. Find affordable one-way fares based on user searches. Data last updated April 11, 2026.
Search for one-way flight options from St. Louis to Riverside. Find affordable one-way fares based on user searches. Data last updated April 11, 2026.
This Super.com deal was found by Cheapflights users on 4/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/98:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 4/10![Frontier logo]()
$144
This Frontier deal was found by Cheapflights users on 4/10. 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 5/248:08 pm
STL
- LAX
1 stop6h 08m
Frontier
Deal found 4/10![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 4/9. 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.
Mon 6/18:08 pm
STL
- LAX
2 stops27h 02m
Frontier
Deal found 4/9![Frontier logo]()
$146
This Kiwi.com deal was found by Cheapflights users on 4/9. 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 6/78:08 pm
STL
- LAX
2 stops14h 55m
Frontier
Deal found 4/9![Frontier logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 4/6. 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 4/258:23 pm
STL
- LAX
2 stops18h 18m
Frontier
Deal found 4/6![Frontier logo]()
$148
This Super.com deal was found by Cheapflights users on 4/10. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/142:56 pm
STL
- LAX
1 stop20h 29m
Frontier
Deal found 4/10![Frontier logo]()
$149
This Kiwi.com deal was found by Cheapflights users on 4/11. 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 7/218:08 pm
STL
- LAX
2 stops25h 12m
Frontier
Deal found 4/11![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 4/6. 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 5/196:33 pm
STL
- LAX
2 stops31h 03m
Frontier
Deal found 4/6![Frontier logo]()
$151
This Kiwi.com deal was found by Cheapflights users on 4/9. 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.
Mon 5/189:18 pm
STL
- LAX
1 stop27h 17m
Multiple Airlines
Deal found 4/9![Multiple Airlines logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 4/8. 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 5/103:33 pm
STL
- LAX
2 stops19h 30m
Frontier
Deal found 4/8![Frontier logo]()
$153
This Kiwi.com deal was found by Cheapflights users on 4/9. 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 5/174:19 pm
STL
- LAX
2 stops33h 57m
Frontier
Deal found 4/9![Frontier logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 4/7. 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 6/306:31 pm
STL
- LAX
2 stops25h 31m
Frontier
Deal found 4/7![Frontier logo]()
$156
Find flight deals from St. Louis to Riverside
Keep the following information in mind while searching for St. Louis to Riverside flight deals. Data was last updated April 11, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $278 (Kiwi.com) |
One-way from | $144 (Super.com) |
Popular in | March |
Cheapest in | September |
Average price | $415 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Riverside 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 11, 2026.
Use the filters below to find and compare flights from St. Louis to Riverside that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 6/5
9:55 pm-11:45 pm
Nonstop3h 50m
Los Angeles Los Angeles
Mon 6/8
5:00 pm-12:10 am
1 stop5h 10m
$413
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 5/5
8:30 am-1:00 pm
1 stop6h 30m
Los Angeles Los Angeles
Mon 5/11
5:00 am-10:35 am
Nonstop3h 35m
$420
Quickest round-trip
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Mon 5/4
9:40 pm-11:45 pm
Nonstop4h 05m
Los Angeles Los Angeles
Mon 5/11
5:00 am-10:35 am
Nonstop3h 35m
$427
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 5/9
6:15 am-12:10 pm
2 stops7h 55m
Los Angeles Los Angeles
Sat 5/16
3:20 pm-11:00 pm
1 stop5h 40m
$430
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 5/9
3:00 pm-5:05 pm
Nonstop4h 05m
Los Angeles Los Angeles
Thu 5/14
11:30 pm-7:55 am
1 stop6h 25m
$430
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sun 6/7
10:50 pm-12:40 am
Nonstop3h 50m
Los Angeles Los Angeles
Sun 6/14
5:40 am-1:10 pm
1 stop5h 30m
$460
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Thu 4/30
8:30 am-10:35 am
Nonstop4h 05m
Los Angeles Los Angeles
Mon 7/27
7:10 am-2:50 pm
1 stop5h 40m
$460
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 5/1
6:20 am-11:15 am
1 stop6h 55m
Los Angeles Los Angeles
Tue 5/5
12:00 pm-11:13 pm
2 stops9h 13m
$481
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Thu 6/18
9:55 pm-11:45 pm
Nonstop3h 50m
Los Angeles Los Angeles
Sun 6/21
11:40 pm-9:15 am
1 stop7h 35m
$543
Cheapest one-way
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 5/29
9:40 pm-11:45 pm
Nonstop4h 05m
$187
Showing 1-10 of 19 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Riverside
Have a flexible travel schedule? Discover the best time to fly to Riverside 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 Riverside
STL-R1V
STL-LAX
How far ahead should I book a flight from St. Louis to Riverside?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Riverside. Price data was last updated on April 9, 2026.
To ensure you get the cheapest price possible for a flight from St. Louis to Riverside, you should look to book at least 58 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from St. Louis to Riverside?
Currently, November is the cheapest month in which you can book a flight from St. Louis to Riverside (average of $67). Flying from St. Louis to Riverside in June is currently the most expensive (average of $246). 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 R1V?
Find hourly flight availability from St. Louis to Riverside. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 11, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 24% on flights from St. Louis to Riverside by exploring options for tickets in the afternoon.
What is the cheapest day to fly from St. Louis to Riverside?
Use this chart to determine the cheapest time to fly round-trip from St. Louis to Riverside. Price data was last updated on April 11, 2026.
Travelers seeking maximum savings on their St. Louis to Riverside flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from St. Louis to Riverside
Explore weekly flight availability from St. Louis to Riverside. 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 11, 2026.
The most flights from STL to R1V are scheduled on a Monday (9 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (7 on average).
How much does it cost to fly round-trip from St. Louis to Riverside?
Reviews of airlines servicing Riverside
Get insights into the airlines that provide service to Riverside. 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 Riverside. Reviews last updated April 11, 2026.
Read through reviews of airlines operating flights from St. Louis to Riverside, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
8.0
Entertainment
7.5
Boarding
8.1
Comfort
8.0
Food
7.0
Crew
8.6
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 Riverside. 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 Riverside
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Riverside by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Riverside by cabin class
Find flights from St. Louis to Riverside, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Riverside flights
Browse other St. Louis and Riverside flight options. Last updated on April 11, 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 11, 2026.
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St. Louis to Riverside flights
Consider these flights traveling from St. Louis to Riverside.
Top 8 airlines flying from St. Louis to Riverside
Discover the top 8 airlines that operate flights from St. Louis to Riverside. 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 11, 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$257 | Average$434 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$264 | Average$375 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$276 | Average$404 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$286 | Average$455 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$304 | Average$372 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$347 | Average$550 | FlexibilityNo cancel fee | On-time75% |