$138+ 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 3/11. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — STL
mar. 7 — mar. 141
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 April, booked 51 days in advance, depart on a Thursday or Wednesday and return on a Thursday
Cheap flight deals from Riverside to St. Louis
Cheapest
Best
Last-minute
One-way
Cheapest flights from Riverside to St. LouisExplore the most affordable flight options available from Riverside to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on februar 5, 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 februar 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
man. 4/1310:00 pm
LAX
- STL
1 stop30h 50m
Frontier
tor. 4/168:12 pm
STL
- LAX
1 stop5h 59m
Frontier
Deal found 2/2![Frontier logo]()
$284
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
tor. 2/129:16 pm
LAX
- STL
1 stop22h 10m
Frontier
tir. 2/173:49 pm
STL
- LAX
2 stops33h 29m
Frontier
Deal found 2/2![Frontier logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
søn. 3/86:15 am
LAX
- STL
1 stop25h 34m
Frontier
fre. 3/1312:16 pm
STL
- LAX
1 stop26h 43m
Frontier
Deal found 2/2![Frontier logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
søn. 3/89:28 pm
LAX
- STL
1 stop11h 51m
Frontier
tor. 3/128:06 pm
STL
- LAX
1 stop22h 27m
Frontier
Deal found 2/3![Frontier logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
tir. 5/127:15 am
LAX
- STL
2 stops21h 35m
Frontier
lør. 5/168:12 pm
STL
- LAX
1 stop14h 28m
Frontier
Deal found 2/3![Frontier logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
søn. 3/89:12 am
LAX
- STL
1 stop6h 12m
Multiple Airlines
søn. 3/810:47 pm
STL
- LAX
1 stop24h 43m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 3/411:45 am
LAX
- STL
2 stops10h 40m
Delta
tir. 3/107:15 am
STL
- LAX
2 stops10h 54m
Delta
Deal found 2/2![Delta logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
tor. 3/266:15 pm
LAX
- STL
2 stops13h 34m
Frontier
lør. 3/2812:14 pm
STL
- LAX
1 stop6h 58m
Frontier
Deal found 2/3![Frontier logo]()
$294
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
fre. 2/202:36 pm
LAX
- STL
1 stop21h 20m
Frontier
lør. 2/216:41 pm
STL
- LAX
1 stop14h 45m
Frontier
Deal found 2/3![Frontier logo]()
$295
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
tor. 4/98:58 pm
LAX
- STL
1 stop10h 50m
Frontier
fre. 4/178:13 pm
STL
- LAX
2 stops27h 53m
Frontier
Deal found 2/2![Frontier logo]()
$296
This Priceline deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
man. 2/91:13 pm
LAX
- STL
1 stop5h 37m
Frontier
ons. 2/113:28 pm
STL
- LAX
1 stop9h 50m
Frontier
Deal found 2/4![Frontier logo]()
$297
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 februar 5, 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 februar 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 3/59:06 pm
LAX
- STL
2 stops10h 43m
Frontier
tor. 3/128:06 pm
STL
- LAX
1 stop22h 27m
Frontier
Deal found 2/4![Frontier logo]()
$293
This Southwest deal was found by Cheapflights users on 2/1. 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.
lør. 4/117:35 am
LAX
- STL
Nonstop3h 30m
Southwest
man. 4/139:40 pm
STL
- LAX
Nonstop4h 05m
Southwest
Deal found 2/1![Southwest logo]()
$310
This Delta deal was found by Cheapflights users on 2/2. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 4/115:45 am
LAX
- STL
1 stop6h 58m
Delta
tir. 4/146:19 am
STL
- LAX
1 stop6h 51m
Delta
Deal found 2/2![Delta logo]()
$333
This United Airlines deal was found by Cheapflights users on 2/1. 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.
lør. 3/74:13 pm
LAX
- STL
1 stop5h 21m
United Airlines
søn. 3/87:41 am
STL
- LAX
1 stop8h 02m
United Airlines
Deal found 2/1![United Airlines logo]()
$343
This American Airlines deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tir. 3/176:17 pm
LAX
- STL
Nonstop3h 41m
American Airlines
lør. 3/216:57 pm
STL
- LAX
1 stop8h 00m
American Airlines
Deal found 2/4![American Airlines logo]()
$363
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 3/411:45 am
LAX
- STL
2 stops9h 38m
Delta
tir. 3/102:22 pm
STL
- LAX
1 stop6h 31m
Delta
Deal found 2/3![Delta logo]()
$333
This Southwest deal was found by Cheapflights users on 2/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 3/125:20 am
LAX
- STL
Nonstop3h 35m
Southwest
tir. 3/178:25 am
STL
- LAX
1 stop6h 15m
Southwest
Deal found 2/2![Southwest logo]()
$334
This Southwest deal was found by Cheapflights users on 2/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 3/55:20 am
LAX
- STL
Nonstop3h 35m
Southwest
tor. 3/57:30 pm
STL
- LAX
1 stop6h 45m
Southwest
Deal found 2/3![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 2/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 3/265:20 am
LAX
- STL
Nonstop3h 35m
Southwest
søn. 3/296:30 pm
STL
- LAX
1 stop7h 50m
Southwest
Deal found 2/3![Southwest logo]()
$353
This Southwest deal was found by Cheapflights users on 2/1. 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.
ons. 3/258:05 am
LAX
- STL
1 stop7h 50m
Southwest
fre. 3/279:55 pm
STL
- LAX
Nonstop4h 10m
Southwest
Deal found 2/1![Southwest logo]()
$385
Last-minute flights from Riverside to St. LouisDiscover last-minute flight deals from Riverside to St. Louis. Data last updated februar 5, 2026 and is based on user searches.
Discover last-minute flight deals from Riverside to St. Louis. Data last updated februar 5, 2026 and is based on user searches.
This Priceline deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
man. 2/91:13 pm
LAX
- STL
1 stop5h 37m
Frontier
ons. 2/113:28 pm
STL
- LAX
1 stop9h 50m
Frontier
Deal found 2/4![Frontier logo]()
$297
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
tor. 2/129:16 pm
LAX
- STL
1 stop22h 10m
Frontier
tir. 2/173:49 pm
STL
- LAX
2 stops33h 29m
Frontier
Deal found 2/2![Frontier logo]()
$286
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
man. 2/1611:59 pm
LAX
- STL
2 stops28h 52m
Multiple Airlines
tor. 2/1910:11 pm
STL
- LAX
1 stop10h 38m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$296
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
fre. 2/202:36 pm
LAX
- STL
1 stop21h 20m
Frontier
lør. 2/216:41 pm
STL
- LAX
1 stop14h 45m
Frontier
Deal found 2/3![Frontier logo]()
$295
This Delta deal was found by Cheapflights users on 2/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ons. 3/411:45 am
LAX
- STL
2 stops9h 38m
Delta
tir. 3/107:15 am
STL
- LAX
2 stops10h 54m
Delta
Deal found 2/5![Delta logo]()
$293
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
søn. 3/86:15 am
LAX
- STL
1 stop25h 34m
Frontier
fre. 3/1312:16 pm
STL
- LAX
1 stop26h 43m
Frontier
Deal found 2/2![Frontier logo]()
$288
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
søn. 3/89:28 pm
LAX
- STL
1 stop11h 51m
Frontier
tor. 3/128:06 pm
STL
- LAX
1 stop22h 27m
Frontier
Deal found 2/3![Frontier logo]()
$290
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
søn. 3/89:12 am
LAX
- STL
1 stop6h 12m
Multiple Airlines
søn. 3/810:47 pm
STL
- LAX
1 stop24h 43m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$292
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
man. 3/99:23 pm
LAX
- STL
1 stop19h 48m
Frontier
fre. 3/138:12 pm
STL
- LAX
2 stops21h 45m
Frontier
Deal found 2/2![Frontier logo]()
$298
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
ons. 3/258:15 pm
LAX
- STL
1 stop23h 47m
Frontier
fre. 3/278:12 pm
STL
- LAX
1 stop16h 37m
Frontier
Deal found 2/3![Frontier logo]()
$291
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
tor. 3/266:15 pm
LAX
- STL
2 stops13h 34m
Frontier
lør. 3/2812:14 pm
STL
- LAX
1 stop6h 58m
Frontier
Deal found 2/3![Frontier logo]()
$294
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 februar 5, 2026.
Search for one-way flight options from Riverside to St. Louis. Find affordable one-way fares based on user searches. Data last updated februar 5, 2026.
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
ons. 3/1111:01 pm
LAX
- STL
2 stops36h 33m
Frontier
Deal found 2/3![Frontier logo]()
$138
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
man. 2/912:33 am
LAX
- STL
2 stops28h 18m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$139
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
ons. 2/186:20 am
LAX
- STL
2 stops37h 06m
Frontier
Deal found 2/2![Frontier logo]()
$140
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
tor. 3/55:49 pm
LAX
- STL
2 stops16h 00m
Frontier
Deal found 2/4![Frontier logo]()
$141
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
lør. 2/281:05 am
LAX
- STL
2 stops27h 46m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
tir. 5/52:58 pm
LAX
- STL
2 stops30h 21m
Frontier
Deal found 2/3![Frontier logo]()
$144
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
lør. 2/211:50 pm
LAX
- STL
2 stops39h 01m
Frontier
Deal found 2/2![Frontier logo]()
$145
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
fre. 3/134:07 pm
LAX
- STL
2 stops15h 42m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$147
This Kiwi.com deal was found by Cheapflights users on 2/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
man. 2/161:05 am
LAX
- STL
2 stops27h 46m
Multiple Airlines
Deal found 2/4![Multiple Airlines logo]()
$148
This Frontier deal was found by Cheapflights users on 2/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
fre. 5/11:19 pm
LAX
- STL
1 stop5h 41m
Frontier
Deal found 2/3![Frontier logo]()
$150
This Priceline deal was found by Cheapflights users on 2/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lør. 2/77:00 am
LAX
- STL
1 stop5h 46m
Frontier
Deal found 2/2![Frontier logo]()
$151
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 februar 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $284 (Kiwi.com) |
One-way from | $138 (Kiwi.com) |
Popular in | March |
Cheapest in | October |
Average price | $397 |
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 februar 5, 2026.
Use the filters below to find and compare flights from Riverside to St. Louis that are best for you.
Fly from
Riverside
Fly to
St. Louis
Route
Depart
Return
Price
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
tor. 3/5
9:06 pm-9:49 am
2 stops10h 43m
Lambert-St Louis
tor. 3/12
8:06 pm-4:33 pm
1 stop22h 27m
$293
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
lør. 4/11
7:35 am-1:05 pm
Nonstop3h 30m
Lambert-St Louis
man. 4/13
9:40 pm-11:45 pm
Nonstop4h 05m
$310
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
lør. 4/11
5:45 am-2:43 pm
1 stop6h 58m
Lambert-St Louis
tir. 4/14
6:19 am-11:10 am
1 stop6h 51m
$333
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
ons. 3/4
11:45 am-11:23 pm
2 stops9h 38m
Lambert-St Louis
tir. 3/10
2:22 pm-6:53 pm
1 stop6h 31m
$333
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
tor. 3/12
5:20 am-10:55 am
Nonstop3h 35m
Lambert-St Louis
tir. 3/17
8:25 am-12:40 pm
1 stop6h 15m
$334
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
lør. 3/7
4:13 pm-11:34 pm
1 stop5h 21m
Lambert-St Louis
søn. 3/8
7:41 am-1:43 pm
1 stop8h 02m
$343
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
tor. 3/5
5:20 am-10:55 am
Nonstop3h 35m
Lambert-St Louis
tor. 3/5
7:30 pm-12:15 am
1 stop6h 45m
$353
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
tor. 3/26
5:20 am-10:55 am
Nonstop3h 35m
Lambert-St Louis
søn. 3/29
6:30 pm-12:20 am
1 stop7h 50m
$353
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
tir. 3/17
6:17 pm-11:58 pm
Nonstop3h 41m
Lambert-St Louis
lør. 3/21
6:57 pm-12:57 am
1 stop8h 00m
$363
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
ons. 3/25
8:05 am-5:55 pm
1 stop7h 50m
Lambert-St Louis
fre. 3/27
9:55 pm-12:05 am
Nonstop4h 10m
$385
Showing 1-10 of 21 results
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 January 30, 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 $232). 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 februar 5, 2026.
It’s optimal to fly from Riverside to St. Louis in the evening. By choosing this option you can save up to 25% 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 January 31, 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.
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 februar 5, 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 (8 on average).
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 februar 5, 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.
Boarding
8.1
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
Reviews
1 / 20
10.0
ExcellentWilliam Drew,Nov 2025
SJC - HNL
Boarding
8.1
Food
7.0
Overall
8.0
Entertainment
7.5
Comfort
8.0
Crew
8.6
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
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Glencoe
Chesterfield
Alton
Farmington
Festus
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 februar 5, 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 februar 5, 2026.
Riverside to St. Louis flights
Consider these flights traveling from Riverside to St. Louis.
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 februar 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$131 | Average$227 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$139 | Average$391 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$257 | Average$505 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$278 | Average$400 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$283 | Average$424 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$292 | Average$456 | FlexibilityNo cancel fee | On-time69% |