$166+ 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 11/1. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — STL
Aug 30 — Sep 61
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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 September, booked 51 days in advance, depart on a Thursday or Tuesday 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 31, 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 31, 2026.
This Expedia deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1312:07 pm
LAX
- STL
1 stop28h 08m
Frontier
Mon 8/174:09 pm
STL
- LAX
1 stop28h 03m
Frontier
Deal found 7/27![Frontier logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 9/166:05 am
LAX
- STL
1 stop11h 12m
Frontier
Sun 9/208:10 pm
STL
- LAX
2 stops13h 37m
Frontier
Deal found 7/27![Frontier logo]()
$314
This Frontier deal was found by Cheapflights users on 7/27. 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 8/236:30 am
LAX
- STL
1 stop10h 43m
Frontier
Wed 8/266:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Deal found 7/27![Frontier logo]()
$318
This Frontier deal was found by Cheapflights users on 7/26. 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 8/2111:20 pm
LAX
- STL
1 stop14h 51m
Frontier
Fri 8/286:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Deal found 7/26![Frontier logo]()
$321
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:20 pm
LAX
- STL
1 stop14h 51m
Frontier
Fri 9/46:17 pm
STL
- LAX
1 stop28h 37m
Frontier
Deal found 7/31![Frontier logo]()
$323
This CheapOair deal was found by Cheapflights users on 7/30. 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 9/2510:04 pm
LAX
- STL
1 stop11h 28m
Frontier
Sun 9/2712:27 pm
STL
- LAX
1 stop21h 20m
Frontier
Deal found 7/30![Frontier logo]()
$324
This Trip.com deal was found by Cheapflights users on 7/27. 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 8/1910:15 am
LAX
- STL
1 stop5h 35m
Frontier
Sun 8/237:58 pm
STL
- LAX
1 stop6h 13m
Frontier
Deal found 7/27![Frontier logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/109:09 pm
LAX
- STL
1 stop18h 56m
Frontier
Mon 8/247:58 pm
STL
- LAX
2 stops15h 31m
Frontier
Deal found 7/27![Frontier logo]()
$329
This Kiwi.com deal was found by Cheapflights users on 7/26. 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 9/46:55 am
LAX
- STL
1 stop8h 55m
Frontier
Tue 9/85:27 pm
STL
- LAX
2 stops20h 23m
Frontier
Deal found 7/26![Frontier logo]()
$330
This Frontier deal was found by Cheapflights users on 7/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/56:30 am
LAX
- STL
1 stop10h 45m
Frontier
Sun 11/86:49 pm
STL
- LAX
1 stop6h 39m
Frontier
Deal found 7/29![Frontier logo]()
$331
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Tue 8/46:30 am
LAX
- STL
1 stop9h 35m
Frontier
Tue 8/255:27 pm
STL
- LAX
2 stops42h 02m
Frontier
Deal found 7/29![Frontier logo]()
$332
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 31, 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 31, 2026.
This Southwest deal was found by Cheapflights users on 7/30. 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.
Mon 10/125:55 pm
LAX
- STL
Nonstop3h 30m
Southwest
Thu 10/159:55 pm
STL
- LAX
Nonstop4h 00m
Southwest
Deal found 7/30![Southwest logo]()
$337
This Delta deal was found by Cheapflights users on 7/27. 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.
Sat 11/149:40 am
LAX
- STL
2 stops9h 28m
Delta
Tue 12/17:00 pm
STL
- LAX
1 stop6h 52m
Delta
Deal found 7/27![Delta logo]()
$428
This Southwest deal was found by Cheapflights users on 7/29. 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.
Thu 11/57:00 pm
LAX
- STL
Nonstop3h 25m
Southwest
Sat 11/78:40 am
STL
- LAX
1 stop7h 45m
Southwest
Deal found 7/29![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 7/28. 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.
Mon 9/141:55 pm
LAX
- STL
1 stop7h 20m
Southwest
Mon 9/286:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 7/28![Southwest logo]()
$347
This Southwest deal was found by Cheapflights users on 7/30. 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.
Mon 8/317:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Fri 9/45:40 pm
STL
- LAX
1 stop7h 35m
Southwest
Deal found 7/30![Southwest logo]()
$367
This Southwest deal was found by Cheapflights users on 7/29. 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.
Thu 10/85:55 pm
LAX
- STL
Nonstop3h 30m
Southwest
Sun 10/115:35 am
STL
- LAX
1 stop5h 40m
Southwest
Deal found 7/29![Southwest logo]()
$405
This Southwest deal was found by Cheapflights users on 7/27. 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 8/207:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Tue 8/259:00 pm
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 7/27![Southwest logo]()
$410
This Southwest deal was found by Cheapflights users on 7/27. 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 9/217:10 pm
LAX
- STL
Nonstop3h 40m
Southwest
Mon 9/286:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 7/27![Southwest logo]()
$417
This Southwest deal was found by Cheapflights users on 7/26. 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 8/277:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Mon 8/313:45 pm
STL
- LAX
1 stop6h 25m
Southwest
Deal found 7/26![Southwest logo]()
$427
This Southwest deal was found by Cheapflights users on 7/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1811:55 am
LAX
- STL
Nonstop3h 30m
Southwest
Sun 11/229:50 pm
STL
- LAX
Nonstop4h 00m
Southwest
Deal found 7/29![Southwest logo]()
$428
This Southwest deal was found by Cheapflights users on 7/29. 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.
Mon 8/247:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Thu 8/276:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 7/29![Southwest logo]()
$437
This Southwest deal was found by Cheapflights users on 7/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/257:25 am
LAX
- STL
1 stop5h 20m
Southwest
Fri 1/15:10 am
STL
- LAX
1 stop6h 55m
Southwest
Deal found 7/28![Southwest logo]()
$460
Last-minute flights from Riverside to St. LouisDiscover last-minute flight deals from Riverside to St. Louis. Data last updated July 31, 2026 and is based on user searches.
Discover last-minute flight deals from Riverside to St. Louis. Data last updated July 31, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Tue 8/46:30 am
LAX
- STL
1 stop9h 35m
Frontier
Tue 8/255:27 pm
STL
- LAX
2 stops42h 02m
Frontier
Deal found 7/29![Frontier logo]()
$332
This Kiwi.com deal was found by Cheapflights users on 7/27. 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 8/109:09 pm
LAX
- STL
1 stop18h 56m
Frontier
Mon 8/247:58 pm
STL
- LAX
2 stops15h 31m
Frontier
Deal found 7/27![Frontier logo]()
$329
This Expedia deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/1312:07 pm
LAX
- STL
1 stop28h 08m
Frontier
Mon 8/174:09 pm
STL
- LAX
1 stop28h 03m
Frontier
Deal found 7/27![Frontier logo]()
$313
This Frontier deal was found by Cheapflights users on 7/27. 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 8/136:30 am
LAX
- STL
1 stop9h 45m
Frontier
Wed 8/196:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Deal found 7/27![Frontier logo]()
$339
This Trip.com deal was found by Cheapflights users on 7/27. 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 8/1910:15 am
LAX
- STL
1 stop5h 35m
Frontier
Sun 8/237:58 pm
STL
- LAX
1 stop6h 13m
Frontier
Deal found 7/27![Frontier logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/197:07 pm
LAX
- STL
2 stops22h 06m
Frontier
Sat 8/226:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Deal found 7/30![Frontier logo]()
$334
This Southwest deal was found by Cheapflights users on 7/29. 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.
Thu 8/207:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Tue 8/259:00 pm
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 7/29![Southwest logo]()
$337
This Frontier deal was found by Cheapflights users on 7/26. 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 8/2111:20 pm
LAX
- STL
1 stop14h 51m
Frontier
Fri 8/286:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Deal found 7/26![Frontier logo]()
$321
This Frontier deal was found by Cheapflights users on 7/27. 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 8/216:55 am
LAX
- STL
1 stop8h 55m
Frontier
Sun 8/237:58 pm
STL
- LAX
1 stop6h 13m
Frontier
Deal found 7/27![Frontier logo]()
$343
This Frontier deal was found by Cheapflights users on 7/27. 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 8/236:30 am
LAX
- STL
1 stop10h 43m
Frontier
Wed 8/266:45 pm
STL
- LAX
1 stop5h 54m
Frontier
Deal found 7/27![Frontier logo]()
$318
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:20 pm
LAX
- STL
1 stop14h 51m
Frontier
Fri 9/46:17 pm
STL
- LAX
1 stop28h 37m
Frontier
Deal found 7/31![Frontier logo]()
$323
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 31, 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 31, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/16:30 am
LAX
- STL
1 stop10h 45m
Frontier
Deal found 7/30![Frontier logo]()
$166
This American Airlines deal was found by Cheapflights users on 7/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/286:06 pm
LAX
- STL
Nonstop3h 40m
American Airlines
Deal found 7/28![American Airlines logo]()
$169
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Thu 9/37:13 pm
LAX
- STL
2 stops20h 37m
Frontier
Deal found 7/28![Frontier logo]()
$172
This Frontier deal was found by Cheapflights users on 7/28. 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 10/116:45 am
LAX
- STL
1 stop9h 01m
Frontier
Deal found 7/28![Frontier logo]()
$173
This Kiwi.com deal was found by Cheapflights users on 7/28. 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.
Thu 10/229:15 am
LAX
- STL
2 stops22h 25m
Frontier
Deal found 7/28![Frontier logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 7/29. 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.
Mon 8/179:39 am
LAX
- STL
1 stop28h 37m
Frontier
Deal found 7/29![Frontier logo]()
$176
This Super.com deal was found by Cheapflights users on 7/31. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/116:30 am
LAX
- STL
1 stop9h 35m
Frontier
Deal found 7/31![Frontier logo]()
$178
This Super.com deal was found by Cheapflights users on 7/26. 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 8/126:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 7/26![Frontier logo]()
$179
This Frontier deal was found by Cheapflights users on 7/27. 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 8/76:30 am
LAX
- STL
1 stop9h 45m
Frontier
Deal found 7/27![Frontier logo]()
$180
This Frontier deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:30 am
LAX
- STL
1 stop9h 45m
Frontier
Deal found 7/30![Frontier logo]()
$181
This Gotogate deal was found by Cheapflights users on 7/27. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/156:30 am
LAX
- STL
1 stop9h 45m
Frontier
Deal found 7/27![Frontier logo]()
$182
This Kiwi.com deal was found by Cheapflights users on 7/30. 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 8/1012:07 pm
LAX
- STL
1 stop27h 58m
Frontier
Deal found 7/30![Frontier logo]()
$183
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 31, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $313 (Expedia) |
One-way from | $166 (Kiwi.com) |
Popular in | March |
Cheapest in | October |
Average price | $489 |
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 31, 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
Quickest round-trip
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Mon 10/12
5:55 pm-11:25 pm
Nonstop3h 30m
Lambert-St Louis
Thu 10/15
9:55 pm-11:55 pm
Nonstop4h 00m
$337
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Thu 11/5
7:00 pm-12:25 am
Nonstop3h 25m
Lambert-St Louis
Sat 11/7
8:40 am-2:25 pm
1 stop7h 45m
$347
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Mon 9/14
1:55 pm-11:15 pm
1 stop7h 20m
Lambert-St Louis
Mon 9/28
6:25 am-8:20 am
Nonstop3h 55m
$347
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Mon 8/31
7:10 pm-12:45 am
Nonstop3h 35m
Lambert-St Louis
Fri 9/4
5:40 pm-11:15 pm
1 stop7h 35m
$367
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Thu 10/8
5:55 pm-11:25 pm
Nonstop3h 30m
Lambert-St Louis
Sun 10/11
5:35 am-9:15 am
1 stop5h 40m
$405
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Thu 8/20
7:10 pm-12:45 am
Nonstop3h 35m
Lambert-St Louis
Tue 8/25
9:00 pm-10:55 pm
Nonstop3h 55m
$410
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Mon 9/21
7:10 pm-12:50 am
Nonstop3h 40m
Lambert-St Louis
Mon 9/28
6:25 am-8:20 am
Nonstop3h 55m
$417
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Thu 8/27
7:10 pm-12:45 am
Nonstop3h 35m
Lambert-St Louis
Mon 8/31
3:45 pm-8:10 pm
1 stop6h 25m
$427
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Sat 11/14
9:40 am-9:08 pm
2 stops9h 28m
Lambert-St Louis
Tue 12/1
7:00 pm-11:52 pm
1 stop6h 52m
$428
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Wed 11/18
11:55 am-5:25 pm
Nonstop3h 30m
Lambert-St Louis
Sun 11/22
9:50 pm-11:50 pm
Nonstop4h 00m
$428
Showing 1-10 of 23 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 31, 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.
Weekly flight availability from Riverside to St. Louis
Explore weekly flight availability from Riverside to St. Louis. 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 31, 2026.
The most flights from R1V to STL are scheduled on a Thursday (10 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (6 on average).
How much does it cost to fly round-trip from Riverside to St. Louis?
Airfare is below average for this route at the moment.
Riverside to St. Louis flights typically cost between $321 and $464 in August.The cheapest round-trip price found within the last 5 days was $313 on Frontier (Aug 13-Aug 17).
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 July 25, 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 31, 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.
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
8.0
ExcellentLa Tracimeldamarcos,Jun 2026
LAX - SLC
Crew
8.6
Comfort
8.0
Boarding
8.1
Food
7.0
Entertainment
7.5
Overall
8.0
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
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.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
St. Louis flight routes
Top destinations
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 31, 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 31, 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 31, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$105 | Average$238 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$165 | Average$422 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$257 | Average$487 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$292 | Average$478 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$292 | Average$454 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$294 | Average$426 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$304 | Average$484 | FlexibilityNo cancel fee | On-time63% |