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$45+ Cheap flights from Riverside, CA to San Diego (SAN)

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 12/10. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SAN
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Cheapflights Tip: The best prices from Riverside to San Diego are usually found in January or July, booked 56 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Find flight deals from Riverside to San Diego

Cheapest flights from Riverside to San Diego
Explore the most affordable flight options available from Riverside to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 30, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/187:00 amLAX - SAN
1 stop14h 39mFrontier
Mon 12/81:33 pmSAN - LAX
1 stop6h 32mFrontier
Deal found 10/29$122
This Kiwi.com deal was found by Cheapflights users on 10/30. 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.
Wed 11/192:48 pmLAX - SAN
1 stop6h 51mFrontier
Mon 12/86:34 amSAN - LAX
1 stop17h 55mFrontier
Deal found 10/30$124
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1712:42 pmLAX - SAN
1 stop3h 58mFrontier
Tue 12/96:25 amSAN - LAX
1 stop4h 14mFrontier
Deal found 10/29$128
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Fri 12/128:57 pmLAX - SAN
1 stop23h 10mFrontier
Fri 12/197:21 pmSAN - LAX
1 stop17h 07mFrontier
Deal found 10/28$129
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/129:04 amLAX - SAN
1 stop27h 31mMultiple Airlines
Sat 11/158:00 amSAN - LAX
1 stop7h 45mMultiple Airlines
Deal found 10/29$131
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/216:00 amLAX - SAN
1 stop9h 07mMultiple Airlines
Mon 12/81:33 pmSAN - LAX
1 stop6h 32mMultiple Airlines
Deal found 10/29$132
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/192:48 pmLAX - SAN
1 stop6h 51mFrontier
Wed 12/106:25 amSAN - LAX
1 stop4h 14mFrontier
Deal found 10/29$133
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Mon 12/229:15 amLAX - SAN
1 stop4h 00mFrontier
Mon 1/58:10 pmSAN - LAX
1 stop18h 42mFrontier
Deal found 10/28$134
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1712:42 pmLAX - SAN
1 stop3h 58mFrontier
Fri 12/121:33 pmSAN - LAX
1 stop6h 32mFrontier
Deal found 10/29$135
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Fri 11/216:00 amLAX - SAN
1 stop9h 07mMultiple Airlines
Sun 11/238:34 amSAN - LAX
1 stop23h 43mMultiple Airlines
Deal found 10/28$139
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Wed 11/267:24 pmLAX - SAN
1 stop12h 30mFrontier
Wed 12/36:25 amSAN - LAX
1 stop27h 38mFrontier
Deal found 10/28$140
This Kiwi.com deal was found by Cheapflights users on 10/28. 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.
Wed 12/249:15 amLAX - SAN
1 stop24h 42mFrontier
Fri 1/22:10 pmSAN - LAX
1 stop21h 10mFrontier
Deal found 10/28$141

Cheap flight deals from Riverside to San Diego

Keep the following information in mind while searching for Riverside to San Diego flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$122
(Kiwi.com)

One-way from

$45
(Kiwi.com)

Popular in

October

Cheapest in

January

Average price

$249
Provider with most accurate pricing for Los Angeles-San Diego flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-San Diego flights.
Search Deals
From Riverside to San Diego
Search Deals
One-way flight from Riverside to San Diego
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($32 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Riverside to San Diego 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 October 30, 2025.
Use the filters below to find and compare flights from Riverside to San Diego that are best for you.

Fly from

Riverside

Fly to

San Diego

Route

Depart

Return

Price

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 11/19

2:48 pm-9:39 pm

1 stop6h 51m

San Diego

Mon 12/8

6:34 am-12:29 am

1 stop17h 55m

$124

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Thu 11/27

2:58 pm-8:01 am

1 stop17h 03m

San Diego

Thu 12/4

3:47 pm-8:05 pm

1 stop4h 18m

$133

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 11/12

7:48 pm-8:24 am

1 stop12h 36m

San Diego

Thu 11/13

3:59 pm-8:14 am

1 stop16h 15m

$159

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Thu 11/20

2:58 pm-11:59 pm

1 stop9h 01m

San Diego

Thu 12/11

10:57 am-7:52 pm

1 stop8h 55m

$165

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Thu 11/13

6:10 am-12:35 pm

1 stop6h 25m

San Diego

Fri 11/14

11:34 am-1:18 pm

2 stops25h 44m

$171

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Sat 2/28

9:29 pm-11:26 am

1 stop13h 57m

San Diego

Wed 3/4

2:30 pm-6:57 pm

1 stop4h 27m

$172

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 11/19

6:24 pm-7:19 pm

Nonstop0h 55m

San Diego

Fri 12/12

4:04 pm-5:08 pm

Nonstop1h 04m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 12/24

6:55 pm-7:57 pm

Nonstop1h 02m

San Diego

Fri 1/2

11:12 am-12:23 pm

Nonstop1h 11m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Fri 12/12

9:59 pm-10:54 pm

Nonstop0h 55m

San Diego

Fri 12/19

9:59 am-11:08 am

Nonstop1h 09m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 12/24

2:40 pm-3:33 pm

Nonstop0h 53m

San Diego

Mon 1/5

7:55 pm-9:10 pm

Nonstop1h 15m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 21 results
1
2
3

Best time to book a flight from Riverside to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego from Riverside 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 Riverside to San Diego

How far ahead should I book a flight from Riverside to San Diego?

Use this chart to determine the optimal time to book a round-trip flight from Riverside to San Diego. Price data was last updated on October 24, 2025.

Booking 56 days in advance of your planned departure date is, on average, the best time to get cheap flights from Riverside to San Diego. 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 San Diego?

Currently, January is the cheapest month in which you can book a flight from Riverside to San Diego (average of $63). Flying from Riverside to San Diego in August is currently the most expensive (average of $179). 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 SAN?

Find hourly flight availability from Riverside to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 26% on flights from Riverside to San Diego by exploring options for tickets in the evening.

What is the cheapest day to fly from Riverside to San Diego?

Use this chart to determine the cheapest time to fly round-trip from Riverside to San Diego. Price data was last updated on October 26, 2025.

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

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated October 30, 2025.
Read through reviews of airlines operating flights from Riverside to San Diego, such as Delta, United Airlines, and Spirit Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,993 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
7.9
Good
7,993 reviews
Delta
7.9
Good
7,993 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,998 reviews
Delta
7.9
Good
7,993 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Spirit Airlines
6.3
Okay
8,115 reviews
Delta
7.9
Good
7,993 reviews

Food

7.3

Crew

8.5

Comfort

7.9

Boarding

8.2

Overall

7.9

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

Related info for your journey

Find useful and relevant information for your journey from Riverside to San Diego. 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 into for flights to San Diego from Riverside?

    San Diego (SAN) is the airport you will fly into if you book a flight from Riverside to San Diego. You should not have trouble finding flights to San Diego from Riverside; the airport handles an average of 18 inbound flights from Riverside per day. You should also have plenty of airline options to choose from since 4 airlines have flights to the San Diego airport from Riverside. It is only a 2.6 mi journey from San Diego (SAN) to San Diego’s city center.

  • How popular is this Riverside to San Diego flight route?

    The Riverside to San Diego flight path was viewed by 6 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 Riverside to San Diego?

    Frontier can get you from Riverside to San Diego in just under 6h 51m. Your travel time can differ by up to . The distance between Riverside and San Diego is about 109 mi.

  • What are the most reliable airlines from Riverside to San Diego?

    Before booking your flight to San Diego from Riverside, check out the most reliable airlines to get you to your destination on time: ITA Airways (100%), Aeromexico (96%), Virgin Atlantic( 89%).

  • What are the cheapest flights from Riverside to San Diego?

    The cheapest flight price from Riverside to San Diego is $153. On average you can expect to pay $331. The most popular route, (Los Angeles - San Diego), can usually be booked for $131.

  • Can I find deals for flights from Riverside to San Diego that include hotel bookings?

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

  • How can I find direct flights from Riverside to San Diego?

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

  • Can I find deals for business class flights from Riverside to San Diego?

    Yes. Cheapflights offers flight deals from Riverside to San Diego 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 Riverside to San Diego?

    Currently, January is the cheapest month in which you can book a flight from Riverside to San Diego (average of $63). Flying from Riverside to San Diego in August is currently the most expensive (average of $179). 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

Traveling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
Chula Vista
Coronado
La Mesa
Poway
Lemon Grove
National City

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Top 4 airlines flying from Riverside to San Diego

Discover the top 4 airlines that operate flights from Riverside to San Diego. 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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$69Average$102FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$179Average$279FlexibilityNo cancel feeOn-time69%
DeltaCheapest$179Average$220FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$181Average$377FlexibilityNo cancel feeOn-time75%

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