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$61+ 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 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SAN
Jan 14 — Jan 211
Wed 1/14
Wed 1/21
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 Thursday and return on a Tuesday

Cheap 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 December 15, 2025.

This Delta deal was found by Cheapflights users on 12/13. 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.
Wed 12/312:40 pmLAX - SAN
Nonstop0h 53mDelta
Wed 1/74:20 pmSAN - LAX
Nonstop1h 11mDelta
Deal found 12/13$179
This Kiwi.com deal was found by Cheapflights users on 12/15. 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 12/312:22 pmLAX - SAN
1 stop19h 35mMultiple Airlines
Sun 1/41:06 pmSAN - LAX
1 stop18h 12mMultiple Airlines
Deal found 12/15$190
This United Airlines deal was found by Cheapflights users on 12/12. 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.
Fri 12/266:55 pmLAX - SAN
Nonstop1h 02mUnited Airlines
Sun 12/2811:12 amSAN - LAX
Nonstop1h 11mUnited Airlines
Deal found 12/12$209
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 12/229:20 pmLAX - SAN
1 stop14h 51mMultiple Airlines
Tue 12/309:14 pmSAN - LAX
1 stop11h 01mMultiple Airlines
Deal found 12/13$210
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 12/239:20 pmLAX - SAN
1 stop14h 51mMultiple Airlines
Thu 12/259:14 pmSAN - LAX
1 stop11h 01mMultiple Airlines
Deal found 12/13$214
This United Airlines deal was found by Cheapflights users on 12/13. 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.
Mon 12/229:21 amLAX - SAN
Nonstop1h 09mUnited Airlines
Mon 12/2911:12 amSAN - LAX
Nonstop1h 11mUnited Airlines
Deal found 12/13$224
This Kiwi.com deal was found by Cheapflights users on 12/15. 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.
Thu 12/259:20 pmLAX - SAN
1 stop15h 18mMultiple Airlines
Sun 12/281:06 pmSAN - LAX
1 stop18h 12mMultiple Airlines
Deal found 12/15$230
This Delta deal was found by Cheapflights users on 12/13. 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 12/232:40 pmLAX - SAN
Nonstop0h 53mDelta
Thu 12/254:15 pmSAN - LAX
Nonstop1h 04mDelta
Deal found 12/13$239
This United Airlines deal was found by Cheapflights users on 12/13. 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.
Mon 12/2210:35 pmLAX - SAN
Nonstop1h 02mUnited Airlines
Tue 12/308:45 pmSAN - LAX
Nonstop1h 10mUnited Airlines
Deal found 12/13$246
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 12/239:20 pmLAX - SAN
1 stop14h 51mMultiple Airlines
Sat 12/277:21 pmSAN - LAX
1 stop11h 57mMultiple Airlines
Deal found 12/13$250
This Kiwi.com deal was found by Cheapflights users on 12/13. 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 12/229:20 pmLAX - SAN
1 stop14h 51mMultiple Airlines
Mon 12/297:21 pmSAN - LAX
1 stop11h 57mMultiple Airlines
Deal found 12/13$256
This United Airlines deal was found by Cheapflights users on 12/15. 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 12/306:55 pmLAX - SAN
Nonstop1h 02mUnited Airlines
Sat 1/36:15 amSAN - LAX
Nonstop1h 11mUnited Airlines
Deal found 12/15$269

Find 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 December 15, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$118
(Kiwi.com)

One-way from

$61
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$282
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. 9% potential increase in price ($22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($6 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 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 December 15, 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

Sat 1/10

9:57 am-1:51 pm

1 stop3h 54m

San Diego

Sun 1/11

9:19 pm-4:48 pm

1 stop19h 29m

$122

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 2/4

11:51 am-10:25 am

1 stop22h 34m

San Diego

Mon 2/9

2:52 pm-8:22 am

1 stop17h 30m

$125

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Sun 1/11

5:01 pm-12:14 pm

1 stop19h 13m

San Diego

Sun 1/18

9:16 am-7:22 pm

1 stop10h 06m

$133

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Tue 2/17

4:40 pm-9:41 pm

2 stops29h 01m

San Diego

Sun 2/22

8:10 pm-7:06 am

1 stop10h 56m

$151

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 1/7

3:25 pm-9:57 pm

1 stop6h 32m

San Diego

Fri 1/9

2:50 pm-9:02 am

2 stops18h 12m

$156

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Sat 1/10

9:55 pm-10:47 pm

Nonstop0h 52m

San Diego

Sun 1/11

7:35 pm-8:50 pm

Nonstop1h 15m

$164

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 2/4

6:15 pm-7:08 pm

Nonstop0h 53m

San Diego

Mon 2/9

2:55 pm-4:04 pm

Nonstop1h 09m

$164

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Sat 2/7

4:45 pm-3:11 pm

1 stop22h 26m

$62

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 3/11

6:00 am-9:49 am

1 stop3h 49m

$111

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Sat 3/14

6:00 am-9:49 am

1 stop3h 49m

$121

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/14

Showing 1-10 of 15 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 December 12, 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, 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 December 15, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 18% 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 December 13, 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.

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 December 15, 2025.

The most flights from R1V to SAN are scheduled on a Monday (42 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (18 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 December 15, 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
8,008 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Overall

7.9

Entertainment

7.9

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
7.9
Good
8,008 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Overall

7.9

Entertainment

7.9

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
9,092 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Overall

7.9

Entertainment

7.9

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
8,187 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Food

7.3

Comfort

7.9

Overall

7.9

Entertainment

7.9

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 32 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 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 3h 54m. Your travel time can differ by up to . The distance between Riverside and San Diego is about 109 mi.

  • What are the cheapest airlines to fly from Riverside to San Diego one-way?

    The cheapest airlines for a one-way flight from Riverside to San Diego are Spirit Airlines ($31), Alaska Airlines ($101), and United Airlines ($153).

  • 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: United Airlines (92%), ANA (86%), Lufthansa( 86%).

  • 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 $391. The most popular route, (Los Angeles - San Diego), can usually be booked for $125.

  • 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
National City
La Mesa
Poway
Julian
Lemon Grove

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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 December 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$69Average$108FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$179Average$239FlexibilityNo cancel feeOn-time69%
DeltaCheapest$179Average$213FlexibilityNo cancel feeOn-timeN/A

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