$139+ Cheap flights from St. Louis (STL) to Riverside, CA
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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from St. Louis to Riverside 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 Lambert-St Louis to Riverside are usually found in September or August, booked 67 days in advance, depart on a Wednesday or Thursday and return on a Tuesday
Cheap flight deals from St. Louis to Riverside
Keep the following information in mind while searching for St. Louis to Riverside flight deals. Data was last updated April 22, 2025.
Most accurate provider | Mytrip 3 stars |
|---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $261 (CheapOair) |
One-way from | $139 (Mytrip) |
Popular in | March |
Cheapest in | September |
Average price | $393 |
Find flight deals from St. Louis to Riverside
Cheapest flights from St. Louis to RiversideExplore the most affordable flight options available from St. Louis to Riverside. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 22, 2025.
Explore the most affordable flight options available from St. Louis to Riverside. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 22, 2025.
This CheapOair deal was found by Cheapflights users on 4/22. 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.
This Mytrip deal was found by Cheapflights users on 4/21. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Mytrip deal was found by Cheapflights users on 4/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Sun Country Air deal was found by Cheapflights users on 4/21. 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 Sun Country Air is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Delta deal was found by Cheapflights users on 4/21. 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.
This American Airlines deal was found by Cheapflights users on 4/21. 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.
This Southwest deal was found by Cheapflights users on 4/21. 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.
This Alaska Airlines deal was found by Cheapflights users on 4/21. 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.
This United Airlines deal was found by Cheapflights users on 4/22. 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.
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Riverside 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 April 22, 2025.
Use the filters below to find and compare flights from St. Louis to Riverside that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 5/27
2:40 pm-7:52 pm
1 stop7h 12m
Los Angeles
Tue 6/3
6:15 am-10:08 am
1 stop25h 53m
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 5/16
12:15 pm-9:30 pm
2 stops11h 15m
Los Angeles
Tue 5/20
5:30 am-11:45 am
2 stops28h 15m
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 5/6
6:10 pm-10:01 pm
2 stops29h 51m
Los Angeles
Fri 5/9
6:00 am-9:15 am
2 stops25h 15m
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sun 6/29
6:12 am-10:44 pm
1 stop18h 32m
Los Angeles
Thu 7/3
11:55 pm-11:30 am
1 stop9h 35m
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Tue 7/1
6:30 am-1:04 pm
1 stop8h 34m
Los Angeles
Thu 7/3
11:30 pm-10:32 am
1 stop9h 02m
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Sat 5/24
6:44 am-8:50 am
Nonstop4h 06m
Los Angeles
Sat 5/31
5:29 pm-11:04 pm
Nonstop3h 35m
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Thu 5/29
10:00 pm-12:05 am
Nonstop4h 05m
Los Angeles
Mon 6/2
7:10 pm-12:50 am
Nonstop3h 40m
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Wed 5/7
7:00 am-9:02 pm
2 stops16h 02m
Los Angeles
Wed 5/7
12:56 am-9:56 am
1 stop7h 00m
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 5/9
6:30 am-9:23 pm
2 stops16h 53m
Los Angeles
Tue 5/13
12:00 pm-11:59 pm
1 stop9h 59m
St. LouisLos Angeles
STL - LAX
STLLAX
Lambert-St Louis
Fri 5/30
5:15 pm-9:30 pm
2 stops30h 15m
Best time to book a flight from St. Louis to Riverside
Have a flexible travel schedule? Discover the best time to fly to Riverside from St. Louis with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Riverside
How far ahead should I book a flight from St. Louis to Riverside?
Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Riverside. Price data was last updated on April 18, 2025.
To ensure you get the cheapest price possible for a flight from St. Louis to Riverside, you should look to book at least 67 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.
What is the cheapest month to book a flight from St. Louis to Riverside?
Currently, January is the cheapest month in which you can book a flight from St. Louis to Riverside (average of $246). Flying from St. Louis to Riverside in June is currently the most expensive (average of $328). 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 STL to R1V?
Find hourly flight availability from St. Louis to Riverside. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 22, 2025.
When flying from St. Louis to Riverside, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
What is the cheapest day to fly from St. Louis to Riverside?
Use this chart to determine the cheapest time to fly round-trip from St. Louis to Riverside. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their St. Louis to Riverside flight should consider departing on Wednesday at noon when fares are most often at their lowest. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Rainfall in Riverside by month
Plan your trip to Riverside by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Riverside ranges from 0.0 - 3.4 inches per month. February is typically the wettest month, when rainfall can reach 3.4 in. July is typically the driest time to visit Riverside when rainfall is around 0.0 in.
Temperature in Riverside by month
Plan your trip to Riverside by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Riverside, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 57.2 F).
Reviews of airlines servicing Riverside
Get insights into the airlines that provide service to Riverside. 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 Riverside. Reviews last updated April 22, 2025.
Read through reviews of airlines operating flights from St. Louis to Riverside, such as Alaska Airlines, Southwest and Delta. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Comfort
Overall
Crew
Entertainment
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Boarding
Comfort
Overall
Crew
Entertainment
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Boarding
Comfort
Overall
Crew
Entertainment
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Boarding
Comfort
Overall
Crew
Entertainment
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Boarding
Comfort
Overall
Crew
Entertainment
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Boarding
Comfort
Overall
Crew
Entertainment
Food
Reviews
Anonymous,Apr 2025
LAS - STS
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Riverside. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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 for St. Louis to Riverside
See prices for flight routes from nearby airports that may be better suited for you.
Top 7 airlines flying from St. Louis to Riverside
Discover the top 7 airlines that operate flights from St. Louis to Riverside. 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 April 22, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$94 | Average$210 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$100 | Average$206 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$181 | Average$418 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$263 | Average$426 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$290 | Average$435 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$290 | Average$430 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$296 | Average$547 | FlexibilityNo cancel fee | On-time75% |