$139+ 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 6/18. Fares are subject to change and may not be available on all flights or dates of travel.
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 August or September, booked 76 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday
Cheap 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 April 22, 2025.
Most accurate provider | Mytrip 3 stars |
|---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $275 (Mytrip) |
One-way from | $139 (Mytrip) |
Popular in | December |
Cheapest in | August |
Average price | $376 |
Find flight deals from Riverside to St. Louis
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 April 22, 2025.
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 April 22, 2025.
This Trip.com 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 Trip.com 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 American 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 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 Delta 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 Delta 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 United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This Hawaiian 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 Hawaiian Airlines 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.
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 April 22, 2025.
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
Price
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Wed 5/7
1:59 pm-9:05 pm
2 stops29h 06m
Lambert-St Louis
Wed 5/14
8:15 pm-12:30 am
1 stop6h 15m
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 5/20
12:41 am-11:45 am
2 stops33h 04m
Lambert-St Louis
Sun 5/25
10:10 am-5:39 pm
1 stop9h 29m
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Wed 5/21
5:29 pm-11:04 pm
Nonstop3h 35m
Lambert-St Louis
Sun 5/25
6:52 am-8:58 am
Nonstop4h 06m
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Sun 5/25
7:05 am-12:50 pm
Nonstop3h 45m
Lambert-St Louis
Tue 6/3
6:25 am-11:00 am
1 stop6h 35m
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Mon 5/19
12:50 am-10:47 am
1 stop7h 57m
Lambert-St Louis
Tue 5/27
6:00 am-12:58 pm
1 stop8h 58m
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 5/6
8:20 pm-9:15 am
3 stops34h 55m
Lambert-St Louis
Sat 5/10
10:10 am-6:51 am
2 stops22h 41m
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 5/13
12:56 am-9:56 am
1 stop7h 00m
Lambert-St Louis
Fri 5/16
5:29 pm-11:59 pm
1 stop8h 30m
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Thu 5/29
1:58 pm-12:04 am
1 stop8h 06m
Lambert-St Louis
Mon 6/2
6:52 am-8:58 am
Nonstop4h 06m
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Wed 6/18
10:18 pm-10:33 am
2 stops34h 15m
Los AngelesSt. Louis
LAX - STL
LAXSTL
Los Angeles
Tue 4/29
3:11 pm-10:01 am
2 stops16h 50m
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.
Cheapflights Insights
Everything you need to know about your flight from Riverside to St. Louis
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 April 18, 2025.
Booking 76 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, August is the cheapest month in which you can book a flight from Riverside to St. Louis (average of $311). Flying from Riverside to St. Louis in March is currently the most expensive (average of $356). 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 April 22, 2025.
When flying from Riverside to St. Louis, 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 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 March 30, 2025.
Travelers seeking maximum savings on their Riverside to St. Louis flight should consider departing on Sunday at noon when fares are most often at their lowest. Monday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
Rainfall in St. Louis by month
Plan your trip to St. Louis by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in St. Louis ranges from 2.2 - 4.7 inches per month. May is typically the wettest month, when rainfall can reach 4.7 in. February is typically the driest time to visit St. Louis when rainfall is around 2.2 in.
Temperature in St. Louis by month
Plan your trip to St. Louis by taking into account the average temperature totals by month.
If weather is an important factor for your trip to St. Louis, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).
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 April 22, 2025.
See what other customers who have flown with Alaska Airlines, Southwest and Delta from Riverside to St. Louis have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
Crew
Food
Boarding
Comfort
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Crew
Food
Boarding
Comfort
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Crew
Food
Boarding
Comfort
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Crew
Food
Boarding
Comfort
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Crew
Food
Boarding
Comfort
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
Entertainment
Crew
Food
Boarding
Comfort
Overall
Reviews
Cheri,Jan 2025
FAT - SEA
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.
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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.
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 April 22, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$66 | Average$278 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$128 | Average$211 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$250 | Average$438 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$296 | Average$454 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$300 | Average$460 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$316 | Average$454 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$327 | Average$737 | FlexibilityNo cancel fee | On-time75% |