$154+ 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 4/20. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — STL
Apr 2 — Apr 91
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 April, booked 51 days in advance, depart on a Wednesday or Thursday 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 March 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 March 3, 2026.
This CheapOair deal was found by Cheapflights users on 2/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:33 pm
LAX
- STL
1 stop24h 53m
Frontier
Tue 3/108:06 pm
STL
- LAX
1 stop23h 24m
Frontier
Deal found 2/27![Frontier logo]()
$297
This Expedia deal was found by Cheapflights users on 2/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/68:57 pm
LAX
- STL
1 stop10h 52m
Frontier
Mon 3/235:46 pm
STL
- LAX
1 stop6h 02m
Frontier
Deal found 2/28![Frontier logo]()
$299
This Expedia deal was found by Cheapflights users on 2/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/198:57 pm
LAX
- STL
1 stop10h 52m
Frontier
Sun 3/228:06 pm
STL
- LAX
1 stop25h 18m
Frontier
Deal found 2/28![Frontier logo]()
$300
This CheapOair deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/213:40 pm
LAX
- STL
1 stop25h 33m
Frontier
Sun 5/2410:55 am
STL
- LAX
1 stop8h 27m
Frontier
Deal found 3/3![Frontier logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 2/26. 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.
Thu 3/1210:03 am
LAX
- STL
2 stops9h 59m
Multiple Airlines
Thu 3/198:06 pm
STL
- LAX
1 stop22h 27m
Multiple Airlines
Deal found 2/26![Multiple Airlines logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 2/28. 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.
Fri 3/279:28 pm
LAX
- STL
1 stop11h 51m
Frontier
Mon 4/68:19 pm
STL
- LAX
1 stop16h 31m
Frontier
Deal found 2/28![Frontier logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 2/28. 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.
Fri 3/279:28 pm
LAX
- STL
1 stop11h 51m
Frontier
Sun 4/510:12 pm
STL
- LAX
1 stop11h 09m
Frontier
Deal found 2/28![Frontier logo]()
$304
This CheapOair deal was found by Cheapflights users on 2/28. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/1810:43 pm
LAX
- STL
1 stop22h 36m
Frontier
Mon 3/235:46 pm
STL
- LAX
1 stop6h 02m
Frontier
Deal found 2/28![Frontier logo]()
$305
This Kiwi.com deal was found by Cheapflights users on 3/2. 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.
Thu 3/1910:03 am
LAX
- STL
2 stops9h 59m
Multiple Airlines
Sat 3/2812:14 pm
STL
- LAX
1 stop6h 58m
Multiple Airlines
Deal found 3/2![Multiple Airlines logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 2/26. 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.
Sun 3/156:15 am
LAX
- STL
1 stop25h 34m
Multiple Airlines
Wed 3/1811:32 am
STL
- LAX
2 stops14h 24m
Multiple Airlines
Deal found 2/26![Multiple Airlines logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 2/28. 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 3/264:07 pm
LAX
- STL
2 stops15h 42m
Multiple Airlines
Fri 4/38:16 pm
STL
- LAX
1 stop5h 56m
Multiple Airlines
Deal found 2/28![Multiple Airlines 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 March 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 March 3, 2026.
This Southwest deal was found by Cheapflights users on 3/1. 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 4/245:00 am
LAX
- STL
Nonstop3h 35m
Southwest
Sat 4/257:05 am
STL
- LAX
1 stop8h 55m
Southwest
Deal found 3/1![Southwest logo]()
$310
This Delta deal was found by Cheapflights users on 2/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2812:30 am
LAX
- STL
1 stop6h 16m
Delta
Tue 6/211:22 am
STL
- LAX
1 stop8h 08m
Delta
Deal found 2/26![Delta logo]()
$348
This Alaska Airlines deal was found by Cheapflights users on 2/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/16:17 pm
LAX
- STL
Nonstop3h 41m
Alaska Airlines
Tue 4/76:21 am
STL
- LAX
Nonstop4h 16m
Alaska Airlines
Deal found 2/28![Alaska Airlines logo]()
$403
This United Airlines deal was found by Cheapflights users on 3/1. 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.
Mon 4/2011:59 pm
LAX
- STL
1 stop6h 26m
United Airlines
Sat 4/257:45 am
STL
- LAX
1 stop7h 48m
United Airlines
Deal found 3/1![United Airlines logo]()
$410
This Southwest deal was found by Cheapflights users on 3/1. 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 4/245:00 am
LAX
- STL
Nonstop3h 35m
Southwest
Tue 4/288:25 am
STL
- LAX
1 stop8h 25m
Southwest
Deal found 3/1![Southwest logo]()
$338
This Southwest deal was found by Cheapflights users on 2/27. 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 4/235:00 am
LAX
- STL
Nonstop3h 35m
Southwest
Thu 4/309:40 pm
STL
- LAX
Nonstop4h 05m
Southwest
Deal found 2/27![Southwest logo]()
$343
This Alaska Airlines deal was found by Cheapflights users on 2/28. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/316:17 pm
LAX
- STL
Nonstop3h 41m
Alaska Airlines
Tue 4/76:21 am
STL
- LAX
Nonstop4h 16m
Alaska Airlines
Deal found 2/28![Alaska Airlines logo]()
$403
This Southwest deal was found by Cheapflights users on 2/26. 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.
Wed 5/612:25 pm
LAX
- STL
Nonstop3h 35m
Southwest
Thu 5/149:40 pm
STL
- LAX
Nonstop4h 05m
Southwest
Deal found 2/26![Southwest logo]()
$388
Last-minute flights from Riverside to St. LouisDiscover last-minute flight deals from Riverside to St. Louis. Data last updated March 3, 2026 and is based on user searches.
Discover last-minute flight deals from Riverside to St. Louis. Data last updated March 3, 2026 and is based on user searches.
This CheapOair deal was found by Cheapflights users on 2/27. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/46:33 pm
LAX
- STL
1 stop24h 53m
Frontier
Tue 3/108:06 pm
STL
- LAX
1 stop23h 24m
Frontier
Deal found 2/27![Frontier logo]()
$297
This Expedia deal was found by Cheapflights users on 2/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/68:57 pm
LAX
- STL
1 stop10h 52m
Frontier
Mon 3/235:46 pm
STL
- LAX
1 stop6h 02m
Frontier
Deal found 2/28![Frontier logo]()
$299
This Kiwi.com deal was found by Cheapflights users on 2/26. 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.
Thu 3/1210:03 am
LAX
- STL
2 stops9h 59m
Multiple Airlines
Thu 3/198:06 pm
STL
- LAX
1 stop22h 27m
Multiple Airlines
Deal found 2/26![Multiple Airlines logo]()
$302
This Kiwi.com deal was found by Cheapflights users on 2/26. 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.
Sun 3/156:15 am
LAX
- STL
1 stop25h 34m
Multiple Airlines
Wed 3/1811:32 am
STL
- LAX
2 stops14h 24m
Multiple Airlines
Deal found 2/26![Multiple Airlines logo]()
$308
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 3/186:30 pm
LAX
- STL
2 stops25h 32m
Frontier
Tue 3/2412:14 pm
STL
- LAX
1 stop7h 16m
Frontier
Deal found 2/27![Frontier logo]()
$305
This Expedia deal was found by Cheapflights users on 2/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/198:57 pm
LAX
- STL
1 stop10h 52m
Frontier
Sun 3/228:06 pm
STL
- LAX
1 stop25h 18m
Frontier
Deal found 2/28![Frontier logo]()
$300
This Kiwi.com deal was found by Cheapflights users on 3/2. 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.
Thu 3/1910:03 am
LAX
- STL
2 stops9h 59m
Multiple Airlines
Sat 3/2812:14 pm
STL
- LAX
1 stop6h 58m
Multiple Airlines
Deal found 3/2![Multiple Airlines logo]()
$306
This Kiwi.com deal was found by Cheapflights users on 2/26. 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.
Thu 3/264:07 pm
LAX
- STL
2 stops15h 42m
Multiple Airlines
Sat 4/48:16 pm
STL
- LAX
1 stop5h 56m
Multiple Airlines
Deal found 2/26![Multiple Airlines logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 2/27. 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.
Fri 3/279:28 pm
LAX
- STL
1 stop11h 51m
Frontier
Mon 3/308:12 pm
STL
- LAX
2 stops25h 18m
Frontier
Deal found 2/27![Frontier logo]()
$301
This Kiwi.com deal was found by Cheapflights users on 2/28. 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.
Fri 3/279:28 pm
LAX
- STL
1 stop11h 51m
Frontier
Mon 4/68:19 pm
STL
- LAX
1 stop16h 31m
Frontier
Deal found 2/28![Frontier logo]()
$303
This Kiwi.com deal was found by Cheapflights users on 2/28. 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.
Fri 3/279:28 pm
LAX
- STL
1 stop11h 51m
Frontier
Sun 4/510:12 pm
STL
- LAX
1 stop11h 09m
Frontier
Deal found 2/28![Frontier logo]()
$304
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 March 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 March 3, 2026.
This Kiwi.com deal was found by Cheapflights users on 3/2. 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 4/209:04 pm
LAX
- STL
2 stops31h 46m
Frontier
Deal found 3/2![Frontier logo]()
$154
This Kiwi.com deal was found by Cheapflights users on 3/1. 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.
Wed 3/2510:03 am
LAX
- STL
3 stops22h 28m
Multiple Airlines
Deal found 3/1![Multiple Airlines logo]()
$157
This Kiwi.com deal was found by Cheapflights users on 2/27. 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 3/256:30 pm
LAX
- STL
2 stops14h 01m
Frontier
Deal found 2/27![Frontier logo]()
$158
This Kiwi.com deal was found by Cheapflights users on 3/2. 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.
Sat 4/41:53 pm
LAX
- STL
1 stop29h 24m
Frontier
Deal found 3/2![Frontier logo]()
$160
This Frontier deal was found by Cheapflights users on 3/1. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/158:57 pm
LAX
- STL
1 stop10h 52m
Frontier
Deal found 3/1![Frontier logo]()
$161
This Kiwi.com deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/94:07 pm
LAX
- STL
2 stops29h 12m
Multiple Airlines
Deal found 3/3![Multiple Airlines logo]()
$162
This Super.com deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/91:28 pm
LAX
- STL
1 stop27h 43m
Frontier
Deal found 3/3![Frontier logo]()
$163
This Kiwi.com deal was found by Cheapflights users on 2/26. 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.
Thu 3/2610:03 am
LAX
- STL
2 stops9h 59m
Multiple Airlines
Deal found 2/26![Multiple Airlines logo]()
$164
This Kiwi.com deal was found by Cheapflights users on 3/1. 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 3/302:19 pm
LAX
- STL
2 stops31h 00m
Frontier
Deal found 3/1![Frontier logo]()
$165
This Kiwi.com deal was found by Cheapflights users on 2/28. 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.
Mon 3/168:19 pm
LAX
- STL
2 stops33h 18m
Frontier
Deal found 2/28![Frontier logo]()
$166
This Alaska Airlines deal was found by Cheapflights users on 3/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/307:15 am
LAX
- STL
1 stop7h 22m
Alaska Airlines
Deal found 3/2![Alaska Airlines logo]()
$167
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 March 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $297 (Southwest) |
One-way from | $154 (Kiwi.com) |
Popular in | February |
Cheapest in | October |
Average price | $428 |
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 March 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
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Fri 4/24
5:00 am-10:35 am
Nonstop3h 35m
Lambert-St Louis
Sat 4/25
7:05 am-2:00 pm
1 stop8h 55m
$310
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Fri 4/24
5:00 am-10:35 am
Nonstop3h 35m
Lambert-St Louis
Tue 4/28
8:25 am-2:50 pm
1 stop8h 25m
$338
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Thu 4/23
5:00 am-10:35 am
Nonstop3h 35m
Lambert-St Louis
Thu 4/30
9:40 pm-11:45 pm
Nonstop4h 05m
$343
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Thu 5/28
12:30 am-8:46 am
1 stop6h 16m
Lambert-St Louis
Tue 6/2
11:22 am-5:30 pm
1 stop8h 08m
$348
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Wed 5/6
12:25 pm-6:00 pm
Nonstop3h 35m
Lambert-St Louis
Thu 5/14
9:40 pm-11:45 pm
Nonstop4h 05m
$388
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Wed 4/1
6:17 pm-11:58 pm
Nonstop3h 41m
Lambert-St Louis
Tue 4/7
6:21 am-8:37 am
Nonstop4h 16m
$403
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 3/31
6:17 pm-11:58 pm
Nonstop3h 41m
Lambert-St Louis
Tue 4/7
6:21 am-8:37 am
Nonstop4h 16m
$403
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Mon 4/20
11:59 pm-8:25 am
1 stop6h 26m
Lambert-St Louis
Sat 4/25
7:45 am-1:33 pm
1 stop7h 48m
$410
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Wed 5/27
7:15 am-4:37 pm
1 stop7h 22m
$167
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 5/26
12:31 pm-11:54 pm
1 stop9h 23m
$167
Showing 1-10 of 18 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
How far ahead should I book a flight from Riverside to St. Louis?
Use this chart to determine the optimal time to book a round-trip flight from Riverside to St. Louis. Price data was last updated on February 27, 2026.
Booking 51 days in advance of your planned departure date is, on average, the best time to get cheap flights from Riverside to St. Louis. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from Riverside to St. Louis?
Currently, September is the cheapest month in which you can book a flight from Riverside to St. Louis (average of $71). Flying from Riverside to St. Louis in March is currently the most expensive (average of $227). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
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 March 3, 2026.
It’s optimal to fly from Riverside to St. Louis in the evening. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight at noon.
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 February 21, 2026.
Travelers seeking maximum savings on their Riverside to St. Louis flight should consider departing on Saturday at noon 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 March 3, 2026.
See what other customers who have flown with Southwest, Delta, and United 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.
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
8.0
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Food
7.0
Boarding
8.1
Crew
8.6
Comfort
8.0
Entertainment
7.5
Overall
8.0
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
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Top 6 airlines flying from Riverside to St. Louis
Discover the top 6 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 March 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$139 | Average$405 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$141 | Average$229 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$257 | Average$505 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$278 | Average$405 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$285 | Average$421 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$292 | Average$473 | FlexibilityNo cancel fee | On-time69% |