$163+ 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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Aug 21 — Aug 281
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 55 days in advance, depart on a Thursday or Friday and return on a Thursday
Cheap flight deals from St. Louis to Riverside
Cheapest
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 July 22, 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 July 22, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 10/258:10 pm
STL
- LAX
1 stop29h 53m
Frontier
Fri 10/306:30 am
LAX
- STL
1 stop10h 45m
Frontier
Deal found 7/20![Frontier logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 10/3110:35 am
STL
- LAX
1 stop10h 13m
Frontier
Sun 11/85:38 pm
LAX
- STL
2 stops23h 37m
Frontier
Deal found 7/21![Frontier logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 9/138:10 pm
STL
- LAX
1 stop5h 53m
Frontier
Tue 9/1512:07 pm
LAX
- STL
1 stop19h 33m
Frontier
Deal found 7/20![Frontier logo]()
$320
This CheapOair deal was found by Cheapflights users on 7/22. 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 8/47:03 pm
STL
- LAX
1 stop16h 27m
Frontier
Tue 8/1810:15 am
LAX
- STL
1 stop5h 35m
Frontier
Deal found 7/22![Frontier logo]()
$321
This Frontier deal was found by Cheapflights users on 7/17. 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 8/18:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Sat 8/296:55 am
LAX
- STL
1 stop8h 55m
Frontier
Deal found 7/17![Frontier logo]()
$322
This Orbitz deal was found by Cheapflights users on 7/18. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:10 pm
STL
- LAX
1 stop27h 04m
Frontier
Tue 8/116:30 am
LAX
- STL
1 stop9h 35m
Frontier
Deal found 7/18![Frontier logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Sun 8/166:34 pm
STL
- LAX
2 stops25h 22m
Frontier
Fri 8/2111:20 pm
LAX
- STL
1 stop14h 51m
Frontier
Deal found 7/18![Frontier logo]()
$324
This Orbitz deal was found by Cheapflights users on 7/20. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/168:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Sun 8/2310:27 pm
LAX
- STL
1 stop17h 23m
Frontier
Deal found 7/20![Frontier logo]()
$326
This CheapOair deal was found by Cheapflights users on 7/19. 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.
Thu 9/35:02 pm
STL
- LAX
1 stop27h 10m
Frontier
Mon 9/710:22 pm
LAX
- STL
1 stop17h 28m
Frontier
Deal found 7/19![Frontier logo]()
$327
This Priceline deal was found by Cheapflights users on 7/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/18:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Wed 8/266:55 am
LAX
- STL
1 stop8h 55m
Frontier
Deal found 7/18![Frontier logo]()
$329
This CheapOair deal was found by Cheapflights users on 7/19. 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 10/305:32 pm
STL
- LAX
1 stop20h 25m
Frontier
Mon 11/29:22 am
LAX
- STL
1 stop6h 32m
Frontier
Deal found 7/19![Frontier logo]()
$330
This Frontier deal was found by Cheapflights users on 7/17. 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.
Tue 8/48:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Tue 8/1110:00 am
LAX
- STL
1 stop7h 23m
Frontier
Deal found 7/17![Frontier logo]()
$331
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 July 22, 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 July 22, 2026.
This Southwest deal was found by Cheapflights users on 7/19. 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 8/189:00 pm
STL
- LAX
Nonstop3h 55m
Southwest
Tue 8/256:50 am
LAX
- STL
Nonstop3h 35m
Southwest
Deal found 7/19![Southwest logo]()
$393
This Southwest deal was found by Cheapflights users on 7/20. 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 8/209:05 pm
STL
- LAX
Nonstop3h 55m
Southwest
Wed 8/2612:20 pm
LAX
- STL
Nonstop3h 30m
Southwest
Deal found 7/20![Southwest logo]()
$415
This Southwest deal was found by Cheapflights users on 7/20. 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 9/186:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Tue 9/2212:20 pm
LAX
- STL
Nonstop3h 30m
Southwest
Deal found 7/20![Southwest logo]()
$418
This Southwest deal was found by Cheapflights users on 7/21. 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 10/311:45 pm
STL
- LAX
Nonstop4h 00m
Southwest
Sun 11/87:00 pm
LAX
- STL
Nonstop3h 25m
Southwest
Deal found 7/21![Southwest logo]()
$418
This Southwest deal was found by Cheapflights users on 7/21. 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 11/178:30 am
STL
- LAX
Nonstop4h 00m
Southwest
Thu 11/267:50 am
LAX
- STL
2 stops8h 40m
Southwest
Deal found 7/21![Southwest logo]()
$420
This Southwest deal was found by Cheapflights users on 7/19. 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 8/292:25 pm
STL
- LAX
2 stops7h 50m
Southwest
Sat 9/58:50 am
LAX
- STL
2 stops8h 05m
Southwest
Deal found 7/19![Southwest logo]()
$423
This Southwest deal was found by Cheapflights users on 7/18. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/19:50 pm
STL
- LAX
Nonstop4h 00m
Southwest
Sat 11/79:50 am
LAX
- STL
1 stop8h 05m
Southwest
Deal found 7/18![Southwest logo]()
$428
This Southwest deal was found by Cheapflights users on 7/21. 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 8/139:05 pm
STL
- LAX
Nonstop3h 55m
Southwest
Fri 8/217:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Deal found 7/21![Southwest logo]()
$430
This Southwest deal was found by Cheapflights users on 7/21. 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 9/58:30 am
STL
- LAX
2 stops9h 05m
Southwest
Sat 9/125:35 am
LAX
- STL
2 stops7h 50m
Southwest
Deal found 7/21![Southwest logo]()
$433
This Southwest deal was found by Cheapflights users on 7/21. 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 10/166:00 am
STL
- LAX
Nonstop4h 05m
Southwest
Mon 10/192:20 pm
LAX
- STL
1 stop7h 00m
Southwest
Deal found 7/21![Southwest logo]()
$440
This Southwest deal was found by Cheapflights users on 7/21. 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 10/304:50 pm
STL
- LAX
1 stop7h 45m
Southwest
Sun 11/17:00 pm
LAX
- STL
Nonstop3h 25m
Southwest
Deal found 7/21![Southwest logo]()
$450
This Southwest deal was found by Cheapflights users on 7/21. 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 12/48:25 am
STL
- LAX
1 stop7h 30m
Southwest
Sat 12/125:40 am
LAX
- STL
2 stops8h 40m
Southwest
Deal found 7/21![Southwest logo]()
$453
Last-minute flights from St. Louis to RiversideDiscover last-minute flight deals from St. Louis to Riverside. Data last updated July 22, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Riverside. Data last updated July 22, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 7/18. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/247:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Sun 8/2310:27 pm
LAX
- STL
1 stop17h 23m
Frontier
Deal found 7/18![Frontier logo]()
$339
This Frontier deal was found by Cheapflights users on 7/17. 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 8/18:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Sat 8/296:55 am
LAX
- STL
1 stop8h 55m
Frontier
Deal found 7/17![Frontier logo]()
$322
This Priceline deal was found by Cheapflights users on 7/18. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/18:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Wed 8/266:55 am
LAX
- STL
1 stop8h 55m
Frontier
Deal found 7/18![Frontier logo]()
$329
This Expedia deal was found by Cheapflights users on 7/20. 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.
Mon 8/37:10 pm
STL
- LAX
1 stop26h 53m
Frontier
Mon 8/109:09 pm
LAX
- STL
1 stop18h 56m
Frontier
Deal found 7/20![Frontier logo]()
$336
This CheapOair deal was found by Cheapflights users on 7/22. 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 8/47:03 pm
STL
- LAX
1 stop16h 27m
Frontier
Tue 8/1810:15 am
LAX
- STL
1 stop5h 35m
Frontier
Deal found 7/22![Frontier logo]()
$321
This Frontier deal was found by Cheapflights users on 7/17. 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.
Tue 8/48:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Tue 8/1110:00 am
LAX
- STL
1 stop7h 23m
Frontier
Deal found 7/17![Frontier logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 7/17. 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.
Tue 8/47:03 pm
STL
- LAX
1 stop16h 27m
Frontier
Thu 8/66:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 7/17![Frontier logo]()
$337
This Frontier deal was found by Cheapflights users on 7/17. 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.
Thu 8/68:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Wed 8/1210:00 am
LAX
- STL
1 stop7h 23m
Frontier
Deal found 7/17![Frontier logo]()
$330
This Orbitz deal was found by Cheapflights users on 7/18. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/97:10 pm
STL
- LAX
1 stop27h 04m
Frontier
Tue 8/116:30 am
LAX
- STL
1 stop9h 35m
Frontier
Deal found 7/18![Frontier logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Sun 8/166:34 pm
STL
- LAX
2 stops25h 22m
Frontier
Fri 8/2111:20 pm
LAX
- STL
1 stop14h 51m
Frontier
Deal found 7/18![Frontier logo]()
$324
This Orbitz deal was found by Cheapflights users on 7/20. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/168:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Sun 8/2310:27 pm
LAX
- STL
1 stop17h 23m
Frontier
Deal found 7/20![Frontier logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/178:08 pm
STL
- LAX
1 stop14h 47m
Frontier
Fri 8/2111:59 pm
LAX
- STL
2 stops39h 23m
Frontier
Deal found 7/21![Frontier logo]()
$338
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 July 22, 2026.
Search for one-way flight options from St. Louis to Riverside. Find affordable one-way fares based on user searches. Data last updated July 22, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Tue 10/1310:35 am
STL
- LAX
2 stops14h 45m
Frontier
Deal found 7/18![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 7/17. 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.
Thu 8/138:08 pm
STL
- LAX
2 stops17h 14m
Frontier
Deal found 7/17![Frontier logo]()
$166
This Super.com deal was found by Cheapflights users on 7/18. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/148:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 7/18![Frontier logo]()
$171
This Frontier deal was found by Cheapflights users on 7/20. 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 7/258:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 7/20![Frontier logo]()
$172
This Kiwi.com deal was found by Cheapflights users on 7/18. 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 10/165:19 pm
STL
- LAX
1 stop24h 33m
Frontier
Deal found 7/18![Frontier logo]()
$173
This Super.com deal was found by Cheapflights users on 7/17. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/287:03 pm
STL
- LAX
1 stop16h 22m
Frontier
Deal found 7/17![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 9/218:34 pm
STL
- LAX
2 stops19h 10m
Frontier
Deal found 7/21![Frontier logo]()
$180
This Kiwi.com deal was found by Cheapflights users on 7/18. 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.
Mon 10/198:34 pm
STL
- LAX
2 stops19h 25m
Frontier
Deal found 7/18![Frontier logo]()
$183
This Super.com deal was found by Cheapflights users on 7/19. 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 7/308:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 7/19![Frontier logo]()
$184
This Kiwi.com deal was found by Cheapflights users on 7/21. 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 8/98:08 pm
STL
- LAX
2 stops26h 06m
Frontier
Deal found 7/21![Frontier logo]()
$185
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 July 22, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $320 (Kiwi.com) |
One-way from | $163 (Kiwi.com) |
Popular in | June |
Cheapest in | September |
Average price | $437 |
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 July 22, 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
Tue 8/18
9:00 pm-10:55 pm
Nonstop3h 55m
Los Angeles Los Angeles
Tue 8/25
6:50 am-12:25 pm
Nonstop3h 35m
$393
Quickest round-trip
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Thu 8/20
9:05 pm-11:00 pm
Nonstop3h 55m
Los Angeles Los Angeles
Wed 8/26
12:20 pm-5:50 pm
Nonstop3h 30m
$415
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 9/18
6:25 am-8:20 am
Nonstop3h 55m
Los Angeles Los Angeles
Tue 9/22
12:20 pm-5:50 pm
Nonstop3h 30m
$418
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 10/31
1:45 pm-3:45 pm
Nonstop4h 00m
Los Angeles Los Angeles
Sun 11/8
7:00 pm-12:25 am
Nonstop3h 25m
$418
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 11/17
8:30 am-10:30 am
Nonstop4h 00m
Los Angeles Los Angeles
Thu 11/26
7:50 am-6:30 pm
2 stops8h 40m
$420
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 8/29
2:25 pm-8:15 pm
2 stops7h 50m
Los Angeles Los Angeles
Sat 9/5
8:50 am-6:55 pm
2 stops8h 05m
$423
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sun 11/1
9:50 pm-11:50 pm
Nonstop4h 00m
Los Angeles Los Angeles
Sat 11/7
9:50 am-7:55 pm
1 stop8h 05m
$428
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Thu 8/13
9:05 pm-11:00 pm
Nonstop3h 55m
Los Angeles Los Angeles
Fri 8/21
7:10 pm-12:45 am
Nonstop3h 35m
$430
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 9/5
8:30 am-3:35 pm
2 stops9h 05m
Los Angeles Los Angeles
Sat 9/12
5:35 am-3:25 pm
2 stops7h 50m
$433
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 10/16
6:00 am-8:05 am
Nonstop4h 05m
Los Angeles Los Angeles
Mon 10/19
2:20 pm-11:20 pm
1 stop7h 00m
$440
Showing 1-10 of 23 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
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 July 22, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 7% on flights from St. Louis to Riverside by exploring options for tickets in the afternoon.
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 July 22, 2026.
The most flights from STL to R1V are scheduled on a Tuesday (10 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (8 on average).
How much does it cost to fly round-trip from St. Louis to Riverside?
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 July 18, 2026.
Travelers seeking maximum savings on their St. Louis to Riverside flight should consider departing on Wednesday mornings 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.
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 July 22, 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.
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Boarding
8.1
Comfort
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
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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Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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Top destinations
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 July 22, 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 July 22, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
St. Louis to Riverside flights
Consider these flights traveling from St. Louis to Riverside.
Top 7 airlines flying from St. Louis to Riverside
Discover the top 7 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 July 22, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$266 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$201 | Average$481 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$284 | Average$410 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$292 | Average$463 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$293 | Average$392 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$304 | Average$384 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$385 | Average$531 | FlexibilityNo cancel fee | On-time75% |