$141+ 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 7/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
Jul 5 — Jul 121
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
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 June 5, 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 June 5, 2026.
This CheapOair deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/17:10 pm
STL
- LAX
1 stop27h 04m
Frontier
Sat 8/296:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 6/3![Frontier logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/57:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Tue 7/77:46 pm
LAX
- STL
1 stop21h 37m
Frontier
Deal found 6/2![Frontier logo]()
$274
This Frontier deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:03 pm
STL
- LAX
1 stop6h 24m
Frontier
Wed 7/86:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 6/3![Frontier logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/78:08 pm
STL
- LAX
1 stop30h 03m
Frontier
Wed 7/151:56 pm
LAX
- STL
2 stops23h 00m
Frontier
Deal found 6/2![Frontier logo]()
$277
This Expedia deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/317:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Sat 8/86:30 am
LAX
- STL
1 stop9h 45m
Frontier
Deal found 6/4![Frontier logo]()
$278
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1610:35 am
STL
- LAX
1 stop9h 07m
Frontier
Tue 9/225:58 pm
LAX
- STL
2 stops13h 42m
Frontier
Deal found 6/3![Frontier logo]()
$280
This Kiwi.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/17:10 pm
STL
- LAX
1 stop27h 04m
Frontier
Mon 8/310:10 am
LAX
- STL
2 stops31h 13m
Frontier
Deal found 6/3![Frontier logo]()
$281
This Trip.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/310:35 am
STL
- LAX
1 stop9h 07m
Frontier
Sat 10/103:15 pm
LAX
- STL
1 stop8h 02m
Frontier
Deal found 6/2![Frontier logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:03 pm
STL
- LAX
1 stop16h 22m
Frontier
Wed 7/2911:00 pm
LAX
- STL
2 stops16h 37m
Frontier
Deal found 6/4![Frontier logo]()
$283
This Expedia deal was found by Cheapflights users on 6/5. 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
Tue 7/286:30 am
LAX
- STL
1 stop9h 35m
Frontier
Deal found 6/5![Frontier logo]()
$284
This Super.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/47:19 pm
STL
- LAX
1 stop6h 21m
Frontier
Sun 7/128:49 pm
LAX
- STL
1 stop20h 34m
Frontier
Deal found 6/3![Frontier logo]()
$285
This Expedia deal was found by Cheapflights users on 6/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/18:08 pm
STL
- LAX
1 stop14h 25m
Frontier
Sun 7/55:35 pm
LAX
- STL
1 stop23h 48m
Frontier
Deal found 6/5![Frontier logo]()
$286
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 June 5, 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 June 5, 2026.
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Sat 8/2910:00 am
LAX
- STL
Nonstop3h 30m
Southwest
Deal found 6/4![Southwest logo]()
$383
This Southwest deal was found by Cheapflights users on 6/1. 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.
Fri 8/286:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Tue 9/16:50 am
LAX
- STL
Nonstop3h 35m
Southwest
Deal found 6/1![Southwest logo]()
$393
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/19:00 pm
STL
- LAX
Nonstop3h 55m
Southwest
Mon 9/77:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Deal found 6/4![Southwest logo]()
$416
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/298:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Fri 10/25:55 pm
LAX
- STL
Nonstop3h 30m
Southwest
Deal found 6/4![Southwest logo]()
$418
This Southwest deal was found by Cheapflights users on 5/31. 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.
Wed 7/229:20 pm
STL
- LAX
Nonstop3h 55m
Southwest
Sun 7/265:30 am
LAX
- STL
Nonstop3h 40m
Southwest
Deal found 5/31![Southwest logo]()
$418
This Southwest deal was found by Cheapflights users on 5/31. 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.
Wed 7/19:20 pm
STL
- LAX
Nonstop3h 50m
Southwest
Fri 7/314:20 pm
LAX
- STL
1 stop5h 35m
Southwest
Deal found 5/31![Southwest logo]()
$428
This Southwest deal was found by Cheapflights users on 6/1. 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.
Fri 8/289:05 pm
STL
- LAX
Nonstop3h 55m
Southwest
Mon 8/318:05 am
LAX
- STL
Nonstop3h 30m
Southwest
Deal found 6/1![Southwest logo]()
$441
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/109:55 pm
STL
- LAX
Nonstop3h 55m
Southwest
Sun 7/125:30 am
LAX
- STL
Nonstop3h 40m
Southwest
Deal found 6/4![Southwest logo]()
$480
This Southwest deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/113:05 pm
STL
- LAX
2 stops8h 00m
Southwest
Tue 10/138:15 am
LAX
- STL
2 stops7h 30m
Southwest
Deal found 6/4![Southwest logo]()
$495
This Southwest deal was found by Cheapflights users on 6/1. 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.
Wed 6/176:40 pm
STL
- LAX
1 stop5h 55m
Southwest
Sat 6/203:45 pm
LAX
- STL
2 stops7h 15m
Southwest
Deal found 6/1![Southwest logo]()
$498
Last-minute flights from St. Louis to RiversideDiscover last-minute flight deals from St. Louis to Riverside. Data last updated June 5, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Riverside. Data last updated June 5, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:03 pm
STL
- LAX
1 stop6h 24m
Frontier
Wed 7/86:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 6/3![Frontier logo]()
$276
This Expedia deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:46 pm
STL
- LAX
1 stop15h 39m
Frontier
Sun 7/55:35 pm
LAX
- STL
1 stop23h 48m
Frontier
Deal found 6/4![Frontier logo]()
$291
This Frontier deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:03 pm
STL
- LAX
1 stop6h 24m
Frontier
Tue 7/76:30 am
LAX
- STL
1 stop9h 35m
Frontier
Deal found 6/4![Frontier logo]()
$292
This Frontier deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/37:38 pm
STL
- LAX
1 stop6h 33m
Frontier
Sat 7/116:30 am
LAX
- STL
1 stop9h 45m
Frontier
Deal found 6/3![Frontier logo]()
$290
This Super.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/47:19 pm
STL
- LAX
1 stop6h 21m
Frontier
Sun 7/128:49 pm
LAX
- STL
1 stop20h 34m
Frontier
Deal found 6/3![Frontier logo]()
$285
This Expedia deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/47:19 pm
STL
- LAX
1 stop6h 21m
Frontier
Mon 7/69:09 pm
LAX
- STL
1 stop18h 56m
Frontier
Deal found 6/3![Frontier logo]()
$289
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/57:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Tue 7/77:46 pm
LAX
- STL
1 stop21h 37m
Frontier
Deal found 6/2![Frontier logo]()
$274
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/78:08 pm
STL
- LAX
1 stop30h 03m
Frontier
Wed 7/151:56 pm
LAX
- STL
2 stops23h 00m
Frontier
Deal found 6/2![Frontier logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/147:03 pm
STL
- LAX
1 stop16h 22m
Frontier
Fri 7/176:30 am
LAX
- STL
1 stop9h 45m
Frontier
Deal found 6/4![Frontier logo]()
$288
This Orbitz deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/158:08 pm
STL
- LAX
1 stop14h 22m
Frontier
Mon 7/2011:00 pm
LAX
- STL
1 stop22h 59m
Frontier
Deal found 6/4![Frontier logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/217:03 pm
STL
- LAX
1 stop16h 22m
Frontier
Wed 7/2911:00 pm
LAX
- STL
2 stops16h 37m
Frontier
Deal found 6/4![Frontier logo]()
$283
This Expedia deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/317:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Sat 8/86:30 am
LAX
- STL
1 stop9h 45m
Frontier
Deal found 6/4![Frontier logo]()
$278
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 June 5, 2026.
Search for one-way flight options from St. Louis to Riverside. Find affordable one-way fares based on user searches. Data last updated June 5, 2026.
This Super.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/87:03 pm
STL
- LAX
1 stop27h 11m
Frontier
Deal found 6/4![Frontier logo]()
$141
This Super.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/258:08 pm
STL
- LAX
1 stop14h 22m
Frontier
Deal found 6/2![Frontier logo]()
$142
This Expedia deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/118:08 pm
STL
- LAX
1 stop14h 22m
Frontier
Deal found 6/2![Frontier logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/307:03 pm
STL
- LAX
2 stops20h 02m
Frontier
Deal found 6/4![Frontier logo]()
$144
This United Airlines deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/87:23 pm
STL
- LAX
1 stop6h 54m
United Airlines
Deal found 6/3![United Airlines logo]()
$146
This Trip.com deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/17:46 pm
STL
- LAX
1 stop21h 21m
Frontier
Deal found 6/4![Frontier logo]()
$149
This Super.com deal was found by Cheapflights users on 6/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/68:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 6/3![Frontier logo]()
$150
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/238:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 6/2![Frontier logo]()
$151
This Frontier deal was found by Cheapflights users on 6/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/1312:46 pm
STL
- LAX
1 stop7h 13m
Frontier
Deal found 6/4![Frontier logo]()
$152
This Kiwi.com deal was found by Cheapflights users on 6/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/154:09 pm
STL
- LAX
1 stop28h 01m
Frontier
Deal found 6/2![Frontier logo]()
$155
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 June 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $273 (CheapOair) |
One-way from | $141 (Super.com) |
Popular in | May |
Cheapest in | September |
Average price | $425 |
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 June 5, 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
Quickest round-trip
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 8/18
8:25 am-10:20 am
Nonstop3h 55m
Los Angeles Los Angeles
Sat 8/29
10:00 am-3:30 pm
Nonstop3h 30m
$383
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 8/28
6:25 am-8:20 am
Nonstop3h 55m
Los Angeles Los Angeles
Tue 9/1
6:50 am-12:25 pm
Nonstop3h 35m
$393
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 9/1
9:00 pm-10:55 pm
Nonstop3h 55m
Los Angeles Los Angeles
Mon 9/7
7:10 pm-12:45 am
Nonstop3h 35m
$416
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 9/29
8:25 am-10:20 am
Nonstop3h 55m
Los Angeles Los Angeles
Fri 10/2
5:55 pm-11:25 pm
Nonstop3h 30m
$418
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Wed 7/22
9:20 pm-11:15 pm
Nonstop3h 55m
Los Angeles Los Angeles
Sun 7/26
5:30 am-11:10 am
Nonstop3h 40m
$418
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Wed 7/1
9:20 pm-11:10 pm
Nonstop3h 50m
Los Angeles Los Angeles
Fri 7/31
4:20 pm-11:55 pm
1 stop5h 35m
$428
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 8/28
9:05 pm-11:00 pm
Nonstop3h 55m
Los Angeles Los Angeles
Mon 8/31
8:05 am-1:35 pm
Nonstop3h 30m
$441
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 7/10
9:55 pm-11:50 pm
Nonstop3h 55m
Los Angeles Los Angeles
Sun 7/12
5:30 am-11:10 am
Nonstop3h 40m
$480
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sun 10/11
3:05 pm-9:05 pm
2 stops8h 00m
Los Angeles Los Angeles
Tue 10/13
8:15 am-5:45 pm
2 stops7h 30m
$495
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Wed 6/17
6:40 pm-10:35 pm
1 stop5h 55m
Los Angeles Los Angeles
Sat 6/20
3:45 pm-1:00 am
2 stops7h 15m
$498
Showing 1-10 of 22 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 June 5, 2026.
Unlike in the morning, when flights are generally more expensive, you can save up to 19% 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 June 5, 2026.
The most flights from STL to R1V are scheduled on a Monday (9 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (6 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 May 30, 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.
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 June 5, 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.
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
Reviews
1 / 20
10.0
ExcellentWalter,May 2026
LAS - BUR
Comfort
8.0
Overall
8.0
Boarding
8.1
Food
7.0
Crew
8.6
Entertainment
7.5
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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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 June 5, 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 June 5, 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 June 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$255 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$201 | Average$480 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$263 | Average$455 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$264 | Average$385 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$296 | Average$394 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$304 | Average$384 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$347 | Average$531 | FlexibilityNo cancel fee | On-time75% |