$165+ Cheap flights from Riverside, CA to St. Louis (STL)
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 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — STL
Aug 2 — Aug 91
Round-trip
1 adult, Economy
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Find cheap flights from Riverside to St. Louis 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 Riverside to Lambert-St Louis are usually found in October or August, booked 51 days in advance, depart on a Thursday or Wednesday and return on a Thursday
Cheap flight deals from Riverside to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Riverside to St. LouisExplore the most affordable flight options available from Riverside to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2026.
Explore the most affordable flight options available from Riverside to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2026.
This CheapOair deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:30 am
LAX
- STL
1 stop9h 45m
Frontier
Sun 8/97:10 pm
STL
- LAX
1 stop27h 04m
Frontier
Deal found 6/30![Frontier logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:55 am
LAX
- STL
1 stop8h 55m
Frontier
Mon 8/316:17 pm
STL
- LAX
2 stops25h 13m
Frontier
Deal found 6/29![Frontier logo]()
$315
This Kiwi.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/316:30 am
LAX
- STL
1 stop9h 45m
Frontier
Mon 8/37:10 pm
STL
- LAX
2 stops15h 45m
Frontier
Deal found 6/30![Frontier logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 7/291:56 pm
LAX
- STL
2 stops26h 19m
Frontier
Mon 8/37:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Deal found 7/2![Frontier logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/278:49 pm
LAX
- STL
1 stop20h 34m
Frontier
Sat 8/18:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 7/1![Frontier logo]()
$319
This CheapOair deal was found by Cheapflights users on 7/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:30 am
LAX
- STL
1 stop9h 35m
Frontier
Tue 7/288:08 pm
STL
- LAX
1 stop14h 47m
Frontier
Deal found 7/1![Frontier logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/83:15 pm
LAX
- STL
1 stop8h 02m
Frontier
Mon 10/1210:35 am
STL
- LAX
2 stops29h 24m
Frontier
Deal found 7/1![Frontier logo]()
$321
This Frontier deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:40 am
LAX
- STL
1 stop7h 43m
Frontier
Tue 7/218:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 6/28![Frontier logo]()
$322
This Kiwi.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2812:52 pm
LAX
- STL
1 stop7h 47m
Frontier
Mon 11/26:49 pm
STL
- LAX
2 stops19h 08m
Frontier
Deal found 6/30![Frontier logo]()
$323
This Kiwi.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:30 am
LAX
- STL
1 stop10h 53m
Frontier
Sat 7/253:41 pm
STL
- LAX
2 stops10h 30m
Frontier
Deal found 6/30![Frontier logo]()
$324
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Mon 8/39:09 pm
LAX
- STL
1 stop18h 56m
Frontier
Fri 8/74:57 pm
STL
- LAX
2 stops33h 14m
Frontier
Deal found 7/2![Frontier logo]()
$325
This Frontier deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/266:30 am
LAX
- STL
1 stop10h 53m
Frontier
Thu 8/68:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 6/28![Frontier logo]()
$326
Best flights from Riverside to St. LouisDiscover carefully curated flight deals from Riverside to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2026.
Discover carefully curated flight deals from Riverside to St. Louis that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2026.
This Southwest deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:00 am
LAX
- STL
Nonstop3h 40m
Southwest
Sat 8/158:30 am
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 6/29![Southwest logo]()
$379
This Delta deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/911:59 pm
LAX
- STL
1 stop8h 24m
Delta
Sun 8/167:45 pm
STL
- LAX
1 stop6h 01m
Delta
Deal found 6/30![Delta logo]()
$463
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/16:50 am
LAX
- STL
1 stop6h 05m
Southwest
Sat 8/82:15 pm
STL
- LAX
Nonstop3h 50m
Southwest
Deal found 7/2![Southwest logo]()
$389
This Southwest deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:25 am
LAX
- STL
2 stops7h 40m
Southwest
Tue 8/411:55 am
STL
- LAX
2 stops7h 50m
Southwest
Deal found 6/30![Southwest logo]()
$409
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2212:20 pm
LAX
- STL
Nonstop3h 30m
Southwest
Fri 9/252:15 pm
STL
- LAX
1 stop6h 30m
Southwest
Deal found 7/2![Southwest logo]()
$421
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Sun 9/64:35 pm
STL
- LAX
1 stop7h 20m
Southwest
Deal found 7/2![Southwest logo]()
$426
This Southwest deal was found by Cheapflights users on 7/1. 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 9/118:05 am
LAX
- STL
Nonstop3h 30m
Southwest
Sun 9/135:50 am
STL
- LAX
1 stop7h 55m
Southwest
Deal found 7/1![Southwest logo]()
$428
This Southwest deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/306:35 am
LAX
- STL
Nonstop3h 35m
Southwest
Sun 8/210:50 pm
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 6/28![Southwest logo]()
$443
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/217:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Sun 8/236:15 pm
STL
- LAX
1 stop7h 00m
Southwest
Deal found 7/2![Southwest logo]()
$453
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/31:05 pm
LAX
- STL
2 stops7h 40m
Southwest
Fri 8/72:20 pm
STL
- LAX
2 stops7h 00m
Southwest
Deal found 7/2![Southwest logo]()
$473
This Southwest deal was found by Cheapflights users on 7/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/812:50 am
LAX
- STL
1 stop7h 25m
Southwest
Sun 8/96:25 pm
STL
- LAX
1 stop6h 50m
Southwest
Deal found 7/2![Southwest logo]()
$479
This Southwest deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/265:30 am
LAX
- STL
Nonstop3h 40m
Southwest
Wed 7/299:20 pm
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 6/29![Southwest logo]()
$481
Last-minute flights from Riverside to St. LouisDiscover last-minute flight deals from Riverside to St. Louis. Data last updated July 3, 2026 and is based on user searches.
Discover last-minute flight deals from Riverside to St. Louis. Data last updated July 3, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:40 am
LAX
- STL
1 stop7h 43m
Frontier
Tue 7/218:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 6/28![Frontier logo]()
$322
This CheapOair deal was found by Cheapflights users on 7/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:30 am
LAX
- STL
1 stop9h 35m
Frontier
Tue 7/288:08 pm
STL
- LAX
1 stop14h 47m
Frontier
Deal found 7/1![Frontier logo]()
$320
This Kiwi.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/226:30 am
LAX
- STL
1 stop10h 53m
Frontier
Sat 7/253:41 pm
STL
- LAX
2 stops10h 30m
Frontier
Deal found 6/30![Frontier logo]()
$324
This CheapOair deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/258:49 pm
LAX
- STL
1 stop20h 34m
Frontier
Fri 7/317:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Deal found 6/30![Frontier logo]()
$329
This Frontier deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/266:30 am
LAX
- STL
1 stop10h 53m
Frontier
Thu 8/68:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 6/28![Frontier logo]()
$326
This Kiwi.com deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/278:49 pm
LAX
- STL
1 stop20h 34m
Frontier
Sat 8/18:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 7/1![Frontier logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 7/2. 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 7/291:56 pm
LAX
- STL
2 stops26h 19m
Frontier
Mon 8/37:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Deal found 7/2![Frontier logo]()
$317
This Kiwi.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/316:30 am
LAX
- STL
1 stop9h 45m
Frontier
Mon 8/37:10 pm
STL
- LAX
2 stops15h 45m
Frontier
Deal found 6/30![Frontier logo]()
$316
This Kiwi.com deal was found by Cheapflights users on 7/2. 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.
Mon 8/39:09 pm
LAX
- STL
1 stop18h 56m
Frontier
Fri 8/74:57 pm
STL
- LAX
2 stops33h 14m
Frontier
Deal found 7/2![Frontier logo]()
$325
This CheapOair deal was found by Cheapflights users on 7/1. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/76:30 am
LAX
- STL
1 stop9h 45m
Frontier
Sun 8/97:10 pm
STL
- LAX
1 stop27h 04m
Frontier
Deal found 7/1![Frontier logo]()
$314
This Kiwi.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1112:07 pm
LAX
- STL
2 stops18h 50m
Frontier
Mon 8/178:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 6/28![Frontier logo]()
$328
This Kiwi.com deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/286:55 am
LAX
- STL
1 stop8h 55m
Frontier
Mon 8/316:17 pm
STL
- LAX
2 stops25h 13m
Frontier
Deal found 6/29![Frontier logo]()
$315
One-way flights from Riverside to St. LouisSearch for one-way flight options from Riverside to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 3, 2026.
Search for one-way flight options from Riverside to St. Louis. Find affordable one-way fares based on user searches. Data last updated July 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/276:15 am
LAX
- STL
1 stop11h 00m
Frontier
Deal found 6/28![Frontier logo]()
$165
This Super.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/86:30 am
LAX
- STL
1 stop9h 35m
Frontier
Deal found 6/28![Frontier logo]()
$170
This Frontier deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/186:30 am
LAX
- STL
1 stop9h 45m
Frontier
Deal found 6/28![Frontier logo]()
$173
This Super.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/2611:00 pm
LAX
- STL
1 stop22h 59m
Frontier
Deal found 6/28![Frontier logo]()
$176
This Super.com deal was found by Cheapflights users on 6/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/246:30 am
LAX
- STL
1 stop9h 45m
Frontier
Deal found 6/28![Frontier logo]()
$177
This Kiwi.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/208:49 pm
LAX
- STL
1 stop20h 34m
Frontier
Deal found 6/30![Frontier logo]()
$181
This Priceline deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/149:40 am
LAX
- STL
1 stop7h 43m
Frontier
Deal found 6/29![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 7/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/11:17 pm
LAX
- STL
2 stops18h 23m
Frontier
Deal found 7/1![Frontier logo]()
$183
This Super.com deal was found by Cheapflights users on 6/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/136:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 6/29![Frontier logo]()
$184
This Super.com deal was found by Cheapflights users on 6/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/66:30 am
LAX
- STL
1 stop9h 45m
Frontier
Deal found 6/30![Frontier logo]()
$185
Find flight deals from Riverside to St. Louis
Keep the following information in mind while searching for Riverside to St. Louis flight deals. Data was last updated July 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $314 (CheapOair) |
One-way from | $165 (Kiwi.com) |
Popular in | March |
Cheapest in | October |
Average price | $439 |
Cheapflights Fare Finder
Customize your flight search to find flights from Riverside to St. Louis 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 3, 2026.
Use the filters below to find and compare flights from Riverside to St. Louis that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Sat 8/8
6:00 am-11:40 am
Nonstop3h 40m
Lambert-St Louis
Sat 8/15
8:30 am-10:25 am
Nonstop3h 55m
$379
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Sat 8/1
6:50 am-2:55 pm
1 stop6h 05m
Lambert-St Louis
Sat 8/8
2:15 pm-4:05 pm
Nonstop3h 50m
$389
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 7/28
6:25 am-4:05 pm
2 stops7h 40m
Lambert-St Louis
Tue 8/4
11:55 am-5:45 pm
2 stops7h 50m
$409
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 9/22
12:20 pm-5:50 pm
Nonstop3h 30m
Lambert-St Louis
Fri 9/25
2:15 pm-6:45 pm
1 stop6h 30m
$421
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Thu 9/3
7:10 pm-12:45 am
Nonstop3h 35m
Lambert-St Louis
Sun 9/6
4:35 pm-9:55 pm
1 stop7h 20m
$426
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Fri 9/11
8:05 am-1:35 pm
Nonstop3h 30m
Lambert-St Louis
Sun 9/13
5:50 am-11:45 am
1 stop7h 55m
$428
Quickest round-trip
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Thu 7/30
6:35 am-12:10 pm
Nonstop3h 35m
Lambert-St Louis
Sun 8/2
10:50 pm-12:45 am
Nonstop3h 55m
$443
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Fri 8/21
7:10 pm-12:45 am
Nonstop3h 35m
Lambert-St Louis
Sun 8/23
6:15 pm-11:15 pm
1 stop7h 00m
$453
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Sun 8/9
11:59 pm-10:23 am
1 stop8h 24m
Lambert-St Louis
Sun 8/16
7:45 pm-11:46 pm
1 stop6h 01m
$463
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Mon 8/3
1:05 pm-10:45 pm
2 stops7h 40m
Lambert-St Louis
Fri 8/7
2:20 pm-7:20 pm
2 stops7h 00m
$473
Showing 1-10 of 21 resultsSorted by cheapest first
Best time to book a flight from Riverside to St. Louis
Have a flexible travel schedule? Discover the best time to fly to St. Louis from Riverside with our price prediction graph.
LAX-STL
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 Riverside to St. Louis
R1V-STL
LAX-STL
What is the cheapest time of day to fly from R1V to STL?
Find hourly flight availability from Riverside to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2026.
It’s optimal to fly from Riverside to St. Louis in the evening. By choosing this option you can save up to 39% on the cost of your flight, compared to a flight at noon.
How much does it cost to fly round-trip from Riverside to St. Louis?
What is the cheapest day to fly from Riverside to St. Louis?
Use this chart to determine the cheapest time to fly round-trip from Riverside to St. Louis. Price data was last updated on June 27, 2026.
Travelers seeking maximum savings on their Riverside to St. Louis flight should consider departing on Tuesday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Reviews of airlines servicing St. Louis
Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated July 3, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Riverside to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Boarding
8.1
Food
7.0
Comfort
8.0
Overall
7.9
Entertainment
7.5
Crew
8.6
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Related info for your journey
Find useful and relevant information for your journey from Riverside to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near St. Louis?
Book flights to St. Louis if you plan to visit one of these locationsEdwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Eureka
Maryland Heights
Collinsville
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
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St. Louis flight routes
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Alternative routes for Riverside to St. Louis
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to St. Louis by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Riverside to St. Louis by cabin class
Find flights from Riverside to St. Louis, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Riverside and St. Louis flights
Browse other Riverside and St. Louis flight options. Last updated on July 3, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to St. Louis
Explore flights to St. Louis departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on July 3, 2026.
Riverside to St. Louis flights
Consider these flights traveling from Riverside to St. Louis.
Top 7 airlines flying from Riverside to St. Louis
Discover the top 7 airlines that operate flights from Riverside to St. Louis. 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 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$141 | Average$246 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$248 | Average$417 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$249 | Average$478 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$257 | Average$487 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$278 | Average$443 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$294 | Average$474 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$294 | Average$426 | FlexibilityNo cancel fee | On-time62% |