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

This flight path from Lambert-St Louis to Riverside was viewed by 17 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

How long is the flight from St. Louis to Riverside?

Airlines like Southwest and Delta fly from St. Louis to Riverside in about 6h 10m. The time it takes to get you to your destination can typically vary by up to 5h 25m. There are 1588 mi between St. Louis and Riverside. Both multi-stop and nonstop flights can be found to your destination and back.

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 $69 on Frontier. Other airlines that offer cheap prices include American Airlines from $139 and Southwest from $149 one-way.

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.

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).

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

Looking at all options, your cheapest flight can be booked for $187. While the most popular route (Lambert-St Louis - Los Angeles) can be booked for $151 on average, our data indicates $954 when flying from St. Louis to Riverside.

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

Consider Japan Airlines (75%), Air Tahiti Nui (75%) or Alaska Airlines (75%) when booking your flight. These represent the most reliable airlines when flying from St. Louis to Riverside.

What are the most popular airlines that fly from St. Louis to Riverside?

Before booking your flight from St. Louis to Riverside check out the most popular airlines for this route: Southwest, American Airlines or Frontier.

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 9 flights from Lambert-St Louis to Riverside per day from 7 different airlines.

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.

$68+ Flights from St. Louis to Riverside

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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 October, booked 58 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap 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 December 16, 2025.

Wed 12/247:43 pmSTL - LAX

1 stop13h 59mFrontier

Thu 1/13:58 pmLAX - STL

1 stop16h 04mFrontier

Deal found 12/14

$218

Wed 12/177:43 pmSTL - LAX

1 stop13h 59mMultiple Airlines

Wed 1/144:07 pmLAX - STL

1 stop18h 33mMultiple Airlines

Deal found 12/14

$238

Wed 12/177:43 pmSTL - LAX

1 stop13h 59mFrontier

Wed 1/147:10 amLAX - STL

1 stop5h 38mFrontier

Deal found 12/14

$239

Mon 12/2210:10 pmSTL - LAX

1 stop16h 06mFrontier

Thu 12/259:58 pmLAX - STL

1 stop21h 27mFrontier

Deal found 12/15

$240

Wed 12/247:43 pmSTL - LAX

1 stop13h 59mFrontier

Wed 12/312:22 pmLAX - STL

2 stops41h 40mFrontier

Deal found 12/13

$245

Mon 12/2210:40 amSTL - LAX

1 stop9h 23mFrontier

Tue 12/303:30 pmLAX - STL

1 stop22h 54mFrontier

Deal found 12/16

$248

Sun 12/2110:10 pmSTL - LAX

1 stop24h 21mFrontier

Sun 12/286:34 amLAX - STL

1 stop25h 28mFrontier

Deal found 12/13

$253

Mon 12/2210:10 pmSTL - LAX

1 stop16h 06mFrontier

Wed 12/241:11 pmLAX - STL

1 stop25h 13mFrontier

Deal found 12/15

$254

Wed 12/247:43 pmSTL - LAX

1 stop13h 59mFrontier

Fri 12/261:11 pmLAX - STL

1 stop6h 14mFrontier

Deal found 12/14

$258

Tue 12/2310:10 pmSTL - LAX

1 stop16h 06mMultiple Airlines

Fri 1/99:17 amLAX - STL

1 stop10h 04mMultiple Airlines

Deal found 12/15

$260

Best flights from St. Louis to Riverside
Discover carefully curated flight deals from St. Louis to Riverside that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 16, 2025.

Sun 1/186:20 amSTL - LAX

1 stop6h 10mSouthwest

Tue 1/2711:35 amLAX - STL

Nonstop3h 35mSouthwest

Deal found 12/15

$305

Tue 3/37:00 amSTL - LAX

2 stops11h 35mDelta

Tue 3/1011:50 amLAX - STL

2 stops9h 25mDelta

Deal found 12/15

$314

Mon 12/2210:10 pmSTL - LAX

1 stop16h 06mFrontier

Wed 12/245:09 pmLAX - STL

2 stops48h 38mFrontier

Deal found 12/16

$317

Sat 2/218:45 pmSTL - LAX

Nonstop4h 20mSouthwest

Sun 3/15:05 amLAX - STL

Nonstop3h 30mSouthwest

Deal found 12/15

$310

Tue 1/67:00 amSTL - LAX

2 stops11h 05mDelta

Tue 1/139:55 amLAX - STL

2 stops9h 40mDelta

Deal found 12/16

$314

Tue 1/1310:25 amSTL - LAX

Nonstop4h 20mSouthwest

Tue 1/208:45 amLAX - STL

2 stops6h 25mSouthwest

Deal found 12/14

$310

Wed 1/286:10 amSTL - LAX

2 stops12h 28mDelta

Wed 2/49:55 amLAX - STL

2 stops9h 43mDelta

Deal found 12/14

$314

Tue 2/173:38 pmSTL - LAX

1 stop7h 42mDelta

Tue 2/245:45 amLAX - STL

1 stop5h 47mDelta

Deal found 12/15

$315

Mon 3/98:25 amSTL - LAX

Nonstop4h 10mSouthwest

Sat 3/145:15 amLAX - STL

1 stop5h 55mSouthwest

Deal found 12/14

$320

Sun 1/185:00 pmSTL - LAX

1 stop6h 39mDelta

Tue 1/276:00 amLAX - STL

1 stop6h 38mDelta

Deal found 12/14

$315

Last-minute flights from St. Louis to Riverside
Discover last-minute flight deals from St. Louis to Riverside. Data last updated December 16, 2025 and is based on user searches.

Fri 1/28:42 pmSTL - LAX

1 stop12h 56mFrontier

Tue 1/67:00 amLAX - STL

1 stop25h 02mFrontier

Deal found 12/15

$185

Mon 1/57:43 pmSTL - LAX

2 stops16h 53mMultiple Airlines

Fri 1/99:17 amLAX - STL

1 stop10h 04mMultiple Airlines

Deal found 12/15

$211

Wed 1/77:43 pmSTL - LAX

1 stop21h 55mFrontier

Sun 1/119:46 pmLAX - STL

1 stop12h 26mFrontier

Deal found 12/15

$191

Wed 1/77:43 pmSTL - LAX

2 stops23h 05mFrontier

Tue 1/132:58 pmLAX - STL

1 stop21h 50mFrontier

Deal found 12/16

$192

Wed 1/77:43 pmSTL - LAX

1 stop21h 55mFrontier

Sat 1/102:00 pmLAX - STL

2 stops42h 02mFrontier

Deal found 12/15

$213

Thu 1/83:43 pmSTL - LAX

2 stops18h 54mFrontier

Sun 1/119:46 pmLAX - STL

1 stop12h 26mFrontier

Deal found 12/15

$193

Sun 1/119:46 pmSTL - LAX

1 stop12h 33mFrontier

Wed 1/147:10 amLAX - STL

1 stop5h 38mFrontier

Deal found 12/15

$217

Sun 1/1810:09 pmSTL - LAX

1 stop12h 11mFrontier

Tue 1/271:56 pmLAX - STL

1 stop22h 50mFrontier

Deal found 12/15

$204

Wed 1/283:46 pmSTL - LAX

1 stop9h 45mFrontier

Sat 2/146:20 amLAX - STL

1 stop5h 36mFrontier

Deal found 12/15

$216

Thu 1/2910:01 pmSTL - LAX

1 stop21h 04mFrontier

Sun 2/17:55 pmLAX - STL

1 stop14h 55mFrontier

Deal found 12/15

$218

Fri 1/307:39 pmSTL - LAX

1 stop20h 05mFrontier

Sun 2/19:31 amLAX - STL

2 stops25h 19mFrontier

Deal found 12/15

$195

One-way flights from St. Louis to Riverside
Search for one-way flight options from St. Louis to Riverside. Find affordable one-way fares based on user searches. Data last updated December 16, 2025.

Sat 1/173:43 pmSTL - LAX

1 stop6h 49mFrontier

Deal found 12/15

$68

Mon 1/121:07 pmSTL - LAX

1 stop8h 14mFrontier

Deal found 12/16

$80

Fri 2/271:59 pmSTL - LAX

1 stop25h 37mFrontier

Deal found 12/15

$84

Fri 1/167:27 pmSTL - LAX

1 stop27h 05mFrontier

Deal found 12/16

$85

Tue 1/135:11 pmSTL - LAX

2 stops30h 39mFrontier

Deal found 12/16

$90

Wed 1/143:43 pmSTL - LAX

1 stop6h 49mFrontier

Deal found 12/16

$91

Mon 1/510:10 pmSTL - LAX

1 stop23h 11mFrontier

Deal found 12/15

$96

Sat 1/310:10 pmSTL - LAX

1 stop16h 06mFrontier

Deal found 12/15

$97

Wed 2/184:51 pmSTL - LAX

1 stop6h 24mFrontier

Deal found 12/15

$99

Sat 2/142:51 pmSTL - LAX

2 stops18h 35mFrontier

Deal found 12/15

$100

Sun 1/181:35 pmSTL - LAX

2 stops20h 24mFrontier

Deal found 12/16

$107

Find flight deals from St. Louis to Riverside

Most accurate provider	Justfly.com 3 stars
Most trusted provider	Justfly.com 3 stars
Round-trip from	$185 (CheapOair)
One-way from	$68 (Kiwi.com)
Popular in	March
Cheapest in	September
Average price	$416

Provider with most accurate pricing for Lambert-St Louis-Los Angeles flight deals.

Search Deals

Provider most trusted by Cheapflights users for Lambert-St Louis-Los Angeles flights.

Search Deals

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. 3% potential increase in price ($15 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

Sun 1/18

6:20 am-10:30 am

1 stop6h 10m

Los Angeles

Tue 1/27

11:35 am-5:10 pm

Nonstop3h 35m

$305

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sat 2/21

8:45 pm-11:05 pm

Nonstop4h 20m

Los Angeles

Sun 3/1

5:05 am-10:35 am

Nonstop3h 30m

$310

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 1/13

10:25 am-12:45 pm

Nonstop4h 20m

Los Angeles

Tue 1/20

8:45 am-5:10 pm

2 stops6h 25m

$310

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 3/3

7:00 am-4:35 pm

2 stops11h 35m

Los Angeles

Tue 3/10

11:50 am-11:15 pm

2 stops9h 25m

$314

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 1/6

7:00 am-4:05 pm

2 stops11h 05m

Los Angeles

Tue 1/13

9:55 am-9:35 pm

2 stops9h 40m

$314

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Wed 1/28

6:10 am-4:38 pm

2 stops12h 28m

Los Angeles

Wed 2/4

9:55 am-9:38 pm

2 stops9h 43m

$314

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Tue 2/17

3:38 pm-9:20 pm

1 stop7h 42m

Los Angeles

Tue 2/24

5:45 am-1:32 pm

1 stop5h 47m

$315

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Sun 1/18

5:00 pm-9:39 pm

1 stop6h 39m

Los Angeles

Tue 1/27

6:00 am-2:38 pm

1 stop6h 38m

$315

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Mon 12/22

10:10 pm-12:16 pm

1 stop16h 06m

Los Angeles

Wed 12/24

5:09 pm-7:47 pm

2 stops48h 38m

$317

St. LouisLos Angeles

STL - LAX

STLLAX

Lambert-St Louis

Mon 3/9

8:25 am-10:35 am

Nonstop4h 10m

Los Angeles

Sat 3/14

5:15 am-1:10 pm

1 stop5h 55m

$320

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 20 results

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?

To ensure you get the cheapest price possible for a flight from St. Louis to Riverside, you should look to book at least 58 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, November is the cheapest month in which you can book a flight from St. Louis to Riverside (average of $67). Flying from St. Louis to Riverside in June is currently the most expensive (average of $248). 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?

Unlike in the morning, when flights are generally more expensive, you can save up to 56% on flights from St. Louis to Riverside by exploring options for tickets in the evening.

What is the cheapest day to fly from St. Louis to Riverside?

Travelers seeking maximum savings on their St. Louis to Riverside flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from St. Louis to Riverside

The most flights from STL to R1V are scheduled on a Monday (11 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (3 on average).

Reviews of airlines servicing Riverside

Read through reviews of airlines operating flights from St. Louis to Riverside, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

7.9

Good

4,250 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Delta

7.9

Good

8,008 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

United Airlines

7.4

Good

9,092 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

American Airlines

7.2

Good

11,049 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Frontier

5.8

Fair

3,082 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

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 9 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 17 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
How long is the flight from St. Louis to Riverside?
Airlines like Southwest and Delta fly from St. Louis to Riverside in about 6h 10m. The time it takes to get you to your destination can typically vary by up to 5h 25m. There are 1588 mi between St. Louis and Riverside. Both multi-stop and nonstop flights can be found to your destination and back.
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 $69 on Frontier. Other airlines that offer cheap prices include American Airlines from $139 and Southwest from $149 one-way.
What are the most reliable airlines from St. Louis to Riverside?
Consider Japan Airlines (75%), Air Tahiti Nui (75%) or Alaska Airlines (75%) 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 $187. While the most popular route (Lambert-St Louis - Los Angeles) can be booked for $151 on average, our data indicates $954 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, November is the cheapest month in which you can book a flight from St. Louis to Riverside (average of $67). Flying from St. Louis to Riverside in June is currently the most expensive (average of $248). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 7 airlines flying from St. Louis to Riverside

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$94	Average$203	FlexibilityNo cancel fee	On-time62%
Delta	Cheapest$171	Average$367	FlexibilityNo cancel fee	On-timeN/A
Spirit Airlines	Cheapest$172	Average$173	FlexibilityNo cancel fee	On-time65%
Southwest	Cheapest$257	Average$414	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$264	Average$399	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$279	Average$431	FlexibilityNo cancel fee	On-time69%
Alaska Airlines	Cheapest$296	Average$512	FlexibilityNo cancel fee	On-time75%

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$68+ 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 2/14. 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

2. Select your favorite providers

3. Compare prices and book

Cheapflights Tip: The best prices from Lambert-St Louis to Riverside are usually found in September or October, booked 58 days in advance, depart on a Wednesday or Thursday and return on a Thursday

Cheap 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 December 16, 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 December 16, 2025.

Find 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 December 16, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

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

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 December 12, 2025.

What is the cheapest month to book a flight from St. Louis to Riverside?

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 December 16, 2025.

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 December 13, 2025.

Weekly flight availability from St. Louis to Riverside

Reviews of airlines servicing Riverside

Read through reviews of airlines operating flights from St. Louis to Riverside, such as Southwest, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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?

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

How long is the flight from St. Louis to Riverside?

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

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

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

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

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

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

What is the cheapest month to book a flight from St. Louis to Riverside?

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

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Top 7 airlines flying from St. Louis to Riverside

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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 December 16, 2025.