$150+ 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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — STL
Jul 1 — Jul 81
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 71 days in advance, depart on a Wednesday or Thursday and return on a Thursday
Cheap flight deals from Riverside to St. Louis
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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 June 1, 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 June 1, 2026.
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/48:15 pm
LAX
- STL
1 stop21h 21m
Frontier
Mon 9/74:10 pm
STL
- LAX
1 stop28h 17m
Frontier
Deal found 6/1![Frontier logo]()
$288
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/1512:51 am
LAX
- STL
1 stop7h 19m
United Airlines
Wed 9/231:36 pm
STL
- LAX
1 stop5h 53m
United Airlines
Deal found 6/1![United Airlines logo]()
$291
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:30 am
LAX
- STL
2 stops24h 27m
Frontier
Tue 8/118:08 pm
STL
- LAX
1 stop14h 47m
Frontier
Deal found 6/1![Frontier logo]()
$296
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/232:54 pm
LAX
- STL
1 stop26h 29m
Frontier
Wed 8/264:10 pm
STL
- LAX
1 stop28h 17m
Frontier
Deal found 6/1![Frontier logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 5/28. 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.
Wed 7/89:50 am
LAX
- STL
1 stop7h 33m
Frontier
Wed 7/158:08 pm
STL
- LAX
2 stops18h 53m
Frontier
Deal found 5/28![Frontier logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 5/28. 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.
Wed 10/149:12 am
LAX
- STL
1 stop8h 03m
Frontier
Mon 10/198:10 pm
STL
- LAX
1 stop5h 53m
Frontier
Deal found 5/28![Frontier logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 5/28. 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.
Wed 7/156:30 am
LAX
- STL
1 stop10h 53m
Frontier
Sun 7/197:10 pm
STL
- LAX
2 stops43h 51m
Frontier
Deal found 5/28![Frontier logo]()
$303
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:30 am
LAX
- STL
1 stop10h 23m
Frontier
Mon 7/67:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Deal found 6/1![Frontier logo]()
$304
This United Airlines deal was found by Cheapflights users on 5/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/2912:51 am
LAX
- STL
1 stop7h 19m
United Airlines
Wed 9/304:40 pm
STL
- LAX
1 stop8h 02m
United Airlines
Deal found 5/30![United Airlines logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 5/28. 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.
Wed 7/89:50 am
LAX
- STL
1 stop7h 33m
Frontier
Sat 7/118:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 5/28![Frontier logo]()
$307
This Kiwi.com deal was found by Cheapflights users on 5/29. 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.
Wed 7/299:50 am
LAX
- STL
1 stop7h 33m
Frontier
Thu 8/68:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 5/29![Frontier logo]()
$308
This Southwest deal was found by Cheapflights users on 5/28. 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 8/178:35 am
LAX
- STL
2 stops7h 20m
Southwest
Wed 8/198:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 5/28![Southwest logo]()
$309
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 June 1, 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 June 1, 2026.
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.
Sat 9/1210:00 am
LAX
- STL
Nonstop3h 30m
Southwest
Tue 9/159:00 pm
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 5/31![Southwest logo]()
$364
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:13 pm
LAX
- STL
Nonstop3h 46m
American Airlines
Tue 8/116:00 am
STL
- LAX
Nonstop4h 10m
American Airlines
Deal found 6/1![American Airlines logo]()
$368
This Booking.com 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/158:56 pm
LAX
- STL
1 stop20h 27m
Frontier
Wed 6/178:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 6/1![Frontier logo]()
$442
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.
Tue 7/145:00 am
LAX
- STL
Nonstop3h 40m
Southwest
Wed 7/159:20 pm
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 6/1![Southwest logo]()
$397
This Southwest deal was found by Cheapflights users on 5/30. 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 8/46:50 am
LAX
- STL
Nonstop3h 35m
Southwest
Fri 8/76:25 am
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 5/30![Southwest logo]()
$418
This Southwest deal was found by Cheapflights users on 5/29. 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 7/228:10 am
LAX
- STL
2 stops7h 35m
Southwest
Wed 7/298:35 am
STL
- LAX
2 stops8h 00m
Southwest
Deal found 5/29![Southwest logo]()
$423
This Southwest deal was found by Cheapflights users on 5/30. 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.
Wed 7/85:00 am
LAX
- STL
Nonstop3h 40m
Southwest
Sun 7/1210:50 pm
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 5/30![Southwest logo]()
$429
This Southwest deal was found by Cheapflights users on 5/28. 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.
Tue 7/216:25 am
LAX
- STL
2 stops7h 55m
Southwest
Mon 7/272:15 pm
STL
- LAX
2 stops7h 30m
Southwest
Deal found 5/28![Southwest logo]()
$440
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 8/56:50 am
LAX
- STL
Nonstop3h 35m
Southwest
Sun 8/169:05 pm
STL
- LAX
Nonstop3h 55m
Southwest
Deal found 6/1![Southwest logo]()
$441
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.
Thu 9/107:10 pm
LAX
- STL
Nonstop3h 35m
Southwest
Mon 9/146:40 pm
STL
- LAX
1 stop5h 45m
Southwest
Deal found 5/31![Southwest logo]()
$449
Last-minute flights from Riverside to St. LouisDiscover last-minute flight deals from Riverside to St. Louis. Data last updated June 1, 2026 and is based on user searches.
Discover last-minute flight deals from Riverside to St. Louis. Data last updated June 1, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 5/28. 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.
Wed 6/176:30 am
LAX
- STL
1 stop10h 53m
Frontier
Mon 6/227:38 pm
STL
- LAX
1 stop6h 33m
Frontier
Deal found 5/28![Frontier logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 5/28. 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.
Wed 6/176:30 am
LAX
- STL
1 stop10h 53m
Frontier
Fri 6/197:38 pm
STL
- LAX
1 stop6h 33m
Frontier
Deal found 5/28![Frontier logo]()
$314
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/177:55 pm
LAX
- STL
1 stop16h 11m
Frontier
Wed 6/247:46 pm
STL
- LAX
1 stop25h 24m
Frontier
Deal found 6/1![Frontier logo]()
$316
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:30 am
LAX
- STL
1 stop10h 23m
Frontier
Mon 7/67:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Deal found 6/1![Frontier logo]()
$304
This Kiwi.com deal was found by Cheapflights users on 5/28. 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 7/77:46 pm
LAX
- STL
1 stop21h 37m
Frontier
Thu 7/97:10 pm
STL
- LAX
1 stop16h 15m
Frontier
Deal found 5/28![Frontier logo]()
$319
This Kiwi.com deal was found by Cheapflights users on 5/28. 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.
Wed 7/89:50 am
LAX
- STL
1 stop7h 33m
Frontier
Wed 7/158:08 pm
STL
- LAX
2 stops18h 53m
Frontier
Deal found 5/28![Frontier logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 5/28. 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.
Wed 7/89:50 am
LAX
- STL
1 stop7h 33m
Frontier
Sat 7/118:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 5/28![Frontier logo]()
$307
This Frontier deal was found by Cheapflights users on 5/30. 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.
Tue 7/146:30 am
LAX
- STL
1 stop9h 35m
Frontier
Tue 7/218:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 5/30![Frontier logo]()
$310
This Kiwi.com deal was found by Cheapflights users on 5/28. 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.
Wed 7/156:30 am
LAX
- STL
1 stop10h 53m
Frontier
Sun 7/197:10 pm
STL
- LAX
2 stops43h 51m
Frontier
Deal found 5/28![Frontier logo]()
$303
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/159:50 am
LAX
- STL
1 stop7h 33m
Frontier
Wed 7/224:09 pm
STL
- LAX
1 stop28h 01m
Frontier
Deal found 5/31![Frontier logo]()
$312
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/216:30 am
LAX
- STL
2 stops24h 27m
Frontier
Tue 8/118:08 pm
STL
- LAX
1 stop14h 47m
Frontier
Deal found 6/1![Frontier logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 5/29. 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.
Wed 7/299:50 am
LAX
- STL
1 stop7h 33m
Frontier
Thu 8/68:08 pm
STL
- LAX
1 stop6h 03m
Frontier
Deal found 5/29![Frontier logo]()
$308
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 June 1, 2026.
Search for one-way flight options from Riverside to St. Louis. Find affordable one-way fares based on user searches. Data last updated June 1, 2026.
This Trip.com deal was found by Cheapflights users on 5/29. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/229:50 am
LAX
- STL
1 stop7h 33m
Frontier
Deal found 5/29![Frontier logo]()
$150
This Super.com deal was found by Cheapflights users on 5/29. 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.
Tue 7/149:40 am
LAX
- STL
1 stop7h 43m
Frontier
Deal found 5/29![Frontier logo]()
$154
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/296:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 5/31![Frontier logo]()
$156
This Super.com 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/139:09 pm
LAX
- STL
1 stop18h 56m
Frontier
Deal found 6/1![Frontier logo]()
$157
This Super.com 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/286:30 am
LAX
- STL
1 stop9h 35m
Frontier
Deal found 5/31![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 5/30. 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.
Wed 6/246:30 am
LAX
- STL
1 stop10h 53m
Frontier
Deal found 5/30![Frontier logo]()
$161
This CheapOair 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/128:49 pm
LAX
- STL
1 stop20h 34m
Frontier
Deal found 6/1![Frontier logo]()
$163
This CheapOair deal was found by Cheapflights users on 5/29. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/237:55 pm
LAX
- STL
1 stop20h 56m
Frontier
Deal found 5/29![Frontier logo]()
$166
This United Airlines deal was found by Cheapflights users on 5/28. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/81:15 pm
LAX
- STL
1 stop7h 15m
United Airlines
Deal found 5/28![United Airlines logo]()
$171
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/272:54 pm
LAX
- STL
2 stops15h 58m
Frontier
Deal found 5/31![Frontier logo]()
$172
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 June 1, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $288 (CheapOair) |
One-way from | $150 (Trip.com) |
Popular in | March |
Cheapest in | October |
Average price | $442 |
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 June 1, 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
Sat 9/12
10:00 am-3:30 pm
Nonstop3h 30m
Lambert-St Louis
Tue 9/15
9:00 pm-10:55 pm
Nonstop3h 55m
$364
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 7/21
6:13 pm-11:59 pm
Nonstop3h 46m
Lambert-St Louis
Tue 8/11
6:00 am-8:10 am
Nonstop4h 10m
$368
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 7/14
5:00 am-10:40 am
Nonstop3h 40m
Lambert-St Louis
Wed 7/15
9:20 pm-11:15 pm
Nonstop3h 55m
$397
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 8/4
6:50 am-12:25 pm
Nonstop3h 35m
Lambert-St Louis
Fri 8/7
6:25 am-8:20 am
Nonstop3h 55m
$418
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Wed 7/22
8:10 am-5:45 pm
2 stops7h 35m
Lambert-St Louis
Wed 7/29
8:35 am-2:35 pm
2 stops8h 00m
$423
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Wed 7/8
5:00 am-10:40 am
Nonstop3h 40m
Lambert-St Louis
Sun 7/12
10:50 pm-12:45 am
Nonstop3h 55m
$429
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 7/21
6:25 am-4:20 pm
2 stops7h 55m
Lambert-St Louis
Mon 7/27
2:15 pm-7:45 pm
2 stops7h 30m
$440
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Wed 8/5
6:50 am-12:25 pm
Nonstop3h 35m
Lambert-St Louis
Sun 8/16
9:05 pm-11:00 pm
Nonstop3h 55m
$441
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Mon 6/15
8:56 pm-7:23 pm
1 stop20h 27m
Lambert-St Louis
Wed 6/17
8:08 pm-12:11 am
1 stop6h 03m
$442
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Thu 9/10
7:10 pm-12:45 am
Nonstop3h 35m
Lambert-St Louis
Mon 9/14
6:40 pm-10:25 pm
1 stop5h 45m
$449
Showing 1-10 of 20 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 June 1, 2026.
It’s optimal to fly from Riverside to St. Louis in the evening. By choosing this option you can save up to 37% 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 June 1, 2026.
The most flights from R1V to STL are scheduled on a Monday (10 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (7 on average).
How much does it cost to fly round-trip from 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 May 30, 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. Sunday evenings 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 June 1, 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.
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Entertainment
7.5
Overall
8.0
Food
7.0
Crew
8.6
Comfort
8.0
Boarding
8.1
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
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
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus
Browse thousands of different options on Cheapflights for your next trip
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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 June 1, 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 June 1, 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 June 1, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$413 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$141 | Average$245 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$249 | Average$473 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$257 | Average$505 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$277 | Average$441 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$294 | Average$426 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$294 | Average$465 | FlexibilityNo cancel fee | On-time63% |