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$42+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SAN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
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 66 days in advance, depart on a Tuesday or Wednesday and return on a Tuesday

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 September 11, 2025.

Round-trip from

$86
(Cheapflightsfares)

One-way from

$42
(Kiwi.com)

Popular in

February

Cheapest in

January

Average price

$205
From Riverside to San Diego
Search Deals
One-way flight from Riverside to San Diego
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High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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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 September 11, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/269:36 amLAX - SAN
1 stop12h 50mSpirit Airlines
Sat 9/276:15 amSAN - LAX
1 stop12h 40mSpirit Airlines
Deal found 9/10$86
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/247:50 pmLAX - SAN
1 stop11h 39mSpirit Airlines
Sat 9/271:35 pmSAN - LAX
1 stop10h 21mSpirit Airlines
Deal found 9/11$92
This Expedia deal was found by Cheapflights users on 9/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/236:15 amLAX - SAN
1 stop6h 16mSpirit Airlines
Fri 9/266:15 amSAN - LAX
1 stop4h 41mSpirit Airlines
Deal found 9/9$98
This Cheapflightsfares deal was found by Cheapflights users on 9/10. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:50 pmLAX - SAN
1 stop3h 44mSpirit Airlines
Thu 10/26:15 amSAN - LAX
1 stop12h 40mSpirit Airlines
Deal found 9/10$104
This Cheapflightsfares deal was found by Cheapflights users on 9/9. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/277:50 pmLAX - SAN
1 stop3h 44mSpirit Airlines
Sun 9/288:25 amSAN - LAX
1 stop10h 30mSpirit Airlines
Deal found 9/9$105
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 9/228:55 pmLAX - SAN
1 stop15h 36mSpirit Airlines
Thu 9/256:15 amSAN - LAX
1 stop4h 41mSpirit Airlines
Deal found 9/9$106
This Mytrip deal was found by Cheapflights users on 9/9. 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.
Wed 10/17:50 pmLAX - SAN
1 stop11h 39mSpirit Airlines
Fri 10/36:15 amSAN - LAX
1 stop7h 18mSpirit Airlines
Deal found 9/9$110
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 9/307:50 pmLAX - SAN
1 stop11h 39mMultiple Airlines
Mon 10/62:52 pmSAN - LAX
1 stop22h 40mMultiple Airlines
Deal found 9/10$112
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 9/247:50 pmLAX - SAN
1 stop3h 44mMultiple Airlines
Wed 10/158:00 amSAN - LAX
1 stop11h 53mMultiple Airlines
Deal found 9/8$113
This Kiwi.com deal was found by Cheapflights users on 9/8. 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 9/236:15 amLAX - SAN
1 stop6h 16mMultiple Airlines
Wed 10/158:00 amSAN - LAX
1 stop11h 53mMultiple Airlines
Deal found 9/8$114
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 10/259:23 amLAX - SAN
1 stop25h 33mFrontier
Sat 11/12:13 pmSAN - LAX
1 stop5h 47mFrontier
Deal found 9/10$117

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 September 11, 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 10/1

7:50 pm-11:34 pm

1 stop3h 44m

San Diego

Thu 10/2

6:15 am-6:55 pm

1 stop12h 40m

$104

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Mon 9/29

9:36 am-10:26 pm

1 stop12h 50m

San Diego

Wed 10/15

8:00 am-9:25 pm

1 stop13h 25m

$121

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 10/15

3:48 pm-9:20 pm

1 stop5h 32m

San Diego

Sun 10/19

11:51 am-1:32 pm

1 stop25h 41m

$136

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Fri 9/26

9:36 am-10:26 pm

1 stop12h 50m

San Diego

Sat 9/27

1:35 pm-11:56 pm

1 stop10h 21m

$155

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Thu 10/2

6:12 pm-7:06 pm

Nonstop0h 54m

San Diego

Sun 10/5

9:59 am-11:14 am

Nonstop1h 15m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Sat 10/25

9:17 am-10:27 am

Nonstop1h 10m

San Diego

Sun 10/26

6:15 am-7:18 am

Nonstop1h 03m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Fri 10/31

10:10 pm-11:06 pm

Nonstop0h 56m

San Diego

Sun 11/2

10:00 am-11:14 am

Nonstop1h 14m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Thu 10/23

10:10 pm-11:06 pm

Nonstop0h 56m

San Diego

Mon 10/27

7:48 pm-9:03 pm

Nonstop1h 15m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Fri 10/10

10:10 pm-11:06 pm

Nonstop0h 56m

San Diego

Sat 10/11

6:20 am-7:35 am

Nonstop1h 15m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Tue 9/30

6:12 pm-7:06 pm

Nonstop0h 54m

San Diego

Sun 10/19

7:48 pm-9:03 pm

Nonstop1h 15m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 20 results
1
2

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 August 29, 2025.

Booking 63 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, August is the cheapest month in which you can book a flight from Riverside to San Diego (average of $286). Flying from Riverside to San Diego in March is currently the most expensive (average of $366). 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 September 11, 2025.

When flying from Riverside to San Diego, 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 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 September 7, 2025.

Travelers seeking maximum savings on their Riverside to San Diego flight should consider departing on Tuesday 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.

Weekly flight availability from Riverside to San Diego

Explore weekly flight availability from Riverside to San Diego. 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 September 11, 2025.

The most flights from R1V to SAN are scheduled on a Thursday (47 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (11 on average).

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 September 11, 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
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

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
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

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
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

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
8,023 reviews
Delta
8.0
Very good
7,960 reviews

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

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 33 inbound flights from Riverside per day. You should also have plenty of airline options to choose from since 3 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 1 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?

    Spirit Airlines, Frontier, and Delta can get you from Riverside to San Diego in just under 54m. Your travel time can differ by up to 4h 38m. The distance between Riverside and San Diego is about 109 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 (97%), Aeromexico (97%), EL AL( 94%).

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

    The cheapest flight price from Riverside to San Diego is $123. On average you can expect to pay $321. The most popular route, (Los Angeles - San Diego), can usually be booked for $86.

  • 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, August is the cheapest month in which you can book a flight from Riverside to San Diego (average of $286). Flying from Riverside to San Diego in March is currently the most expensive (average of $366). 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
La Mesa
Poway
Lemon Grove
Coronado
Imperial Beach
National City
Alpine

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Top 3 airlines flying from Riverside to San Diego

Discover the top 3 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$69Average$99FlexibilityNo cancel feeOn-time65%
DeltaCheapest$179Average$201FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$179Average$245FlexibilityNo cancel feeOn-time69%

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