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Riverside

$143+ 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
STL — LAX
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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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 30, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$261
(Frontier)

One-way from

$143
(Booking.com)

Popular in

March

Cheapest in

September

Average price

$381
Provider with most accurate pricing for Lambert-St Louis-Los Angeles flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Los Angeles flights.
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From Lambert-St Louis to Riverside
Search Deals
One-way flight from Lambert-St Louis to Riverside
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Find flight deals from St. Louis to Riverside

Cheapest flights from St. Louis to Riverside
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 30, 2025.

This Frontier deal was found by Cheapflights users on 4/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/292:25 pmSTL - LAX
1 stop7h 27mFrontier
Sat 6/289:28 pmLAX - STL
1 stop14h 12mFrontier
Deal found 4/29$261
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/136:12 pmSTL - LAX
1 stop29h 49mSpirit Airlines
Thu 6/199:30 pmLAX - STL
1 stop17h 34mSpirit Airlines
Deal found 4/29$263
This Mytrip deal was found by Cheapflights users on 4/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/2012:15 pmSTL - LAX
2 stops35h 15mMultiple Airlines
Wed 5/2810:30 amLAX - STL
2 stops20h 45mMultiple Airlines
Deal found 4/29$268
This American Airlines deal was found by Cheapflights users on 4/29. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/206:52 amSTL - LAX
Nonstop4h 06mAmerican Airlines
Tue 5/275:29 pmLAX - STL
Nonstop3h 35mAmerican Airlines
Deal found 4/29$305
This Southwest deal was found by Cheapflights users on 4/29. 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.
Tue 6/176:05 amSTL - LAX
1 stop7h 10mSouthwest
Tue 7/156:45 pmLAX - STL
Nonstop3h 40mSouthwest
Deal found 4/29$315
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/174:32 pmSTL - LAX
1 stop6h 18mUnited Airlines
Tue 7/158:00 amLAX - STL
1 stop6h 45mUnited Airlines
Deal found 4/29$320
This Alaska Airlines deal was found by Cheapflights users on 4/29. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/147:00 amSTL - LAX
1 stop9h 40mAlaska Airlines
Tue 10/2111:20 amLAX - STL
1 stop10h 36mAlaska Airlines
Deal found 4/29$324
This Delta deal was found by Cheapflights users on 4/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/87:15 amSTL - LAX
1 stop7h 05mDelta
Tue 7/1511:55 pmLAX - STL
1 stop6h 39mDelta
Deal found 4/29$325

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 30, 2025.
Use the filters below to find and compare flights from St. Louis to Riverside that are best for you.

Fly from

St. Louis

Fly to

Riverside

Route

Depart

Return

Price

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Thu 5/29

2:25 pm-7:52 pm

1 stop7h 27m

Los Angeles

Wed 6/25

9:28 pm-1:40 pm

1 stop14h 12m

$261

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Fri 6/13

6:12 pm-10:01 pm

1 stop29h 49m

Los Angeles

Thu 6/19

9:30 pm-5:04 pm

1 stop17h 34m

$263

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 5/20

12:15 pm-9:30 pm

2 stops35h 15m

Los Angeles

Wed 5/28

10:30 am-9:15 am

2 stops20h 45m

$268

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 5/20

6:52 am-8:58 am

Nonstop4h 06m

Los Angeles

Tue 5/27

5:29 pm-11:04 pm

Nonstop3h 35m

$305

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 6/17

6:05 am-11:15 am

1 stop7h 10m

Los Angeles

Tue 7/15

6:45 pm-12:25 am

Nonstop3h 40m

$315

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 6/17

4:32 pm-8:50 pm

1 stop6h 18m

Los Angeles

Tue 7/15

8:00 am-4:45 pm

1 stop6h 45m

$320

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 10/14

7:00 am-2:40 pm

1 stop9h 40m

Los Angeles

Tue 10/21

11:20 am-11:56 pm

1 stop10h 36m

$324

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 7/8

7:15 am-12:20 pm

1 stop7h 05m

Los Angeles

Tue 7/15

11:55 pm-8:34 am

1 stop6h 39m

$325

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sun 8/24

5:10 pm-7:57 am

1 stop16h 47m

$143

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Fri 5/23

7:24 pm-12:32 am

1 stop7h 08m

$146

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 18 results
1
2

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.
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 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 25, 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 March is currently the most expensive (average of $327). 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 30, 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.

Weekly flight availability from St. Louis to Riverside

Explore weekly flight availability from St. Louis to Riverside. 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 April 30, 2025.

The most flights from STL to R1V are scheduled on a Wednesday (12 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (6 on average).

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 30, 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.
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
9,961 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,295 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,929 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.9
Good
2,405 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,961 reviews

Food

7.1

Boarding

8.2

Comfort

7.9

Overall

8.0

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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.

  • What airport do you fly from for flights from St. Louis to Riverside?

    If you book a flight to Riverside from St. Louis, you will be flying from Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis. There are 8 flights from Lambert-St Louis to Riverside per day from 7 different airlines.

  • How popular is this St. Louis to Riverside flight route?

    This flight path from Lambert-St Louis to Riverside was viewed by 10 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • What are the cheapest airlines to fly from St. Louis to Riverside one-way?

    One-way options have recently been found by users for as low as $143 on Sun Country Air. Other airlines that offer cheap prices include Frontier from $146 and Spirit Airlines from $147 one-way.

  • What are the most reliable airlines from St. Louis to Riverside?

    Consider Sun Country Air (100%), Southwest (86%) or Cathay Pacific (85%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Riverside.

  • What are the cheapest flights from St. Louis to Riverside?

    Looking at all options, your cheapest flight can be booked for $152. While the most popular route (Lambert-St Louis - Los Angeles) can be booked for $181 on average our data indicates $1,340 when flying from St. Louis to Riverside.

  • Can I find deals for flights from St. Louis to Riverside that include hotel bookings?

    Yes. In addition to deals on St. Louis to Riverside flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Riverside?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Riverside.

  • Can I find deals for business class flights from St. Louis to Riverside?

    Yes. Cheapflights offers flight deals from St. Louis to Riverside by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 March is currently the most expensive (average of $327). 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.

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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 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$94Average$212FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$100Average$206FlexibilityNo cancel feeOn-time65%
DeltaCheapest$181Average$425FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$263Average$424FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$290Average$430FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$290Average$433FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$296Average$518FlexibilityNo cancel feeOn-time75%

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