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$52+ 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 2/28. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — SAN
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheapflights Tip: The best prices from Riverside to San Diego are usually found in July or March, booked 66 days in advance, depart on a Tuesday or Thursday and return on a Thursday

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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/27. 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 3/1010:15 pm
LAX
-
SAN
1 stop16h 16m
Frontier
Wed 3/183:16 pm
SAN
-
LAX
1 stop6h 14m
Frontier
Deal found 1/27$103
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/254:40 pm
LAX
-
SAN
1 stop25h 11m
Frontier
Wed 3/48:45 am
SAN
-
LAX
1 stop11h 47m
Frontier
Deal found 1/28$106
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 3/116:15 am
LAX
-
SAN
1 stop14h 59m
Frontier
Wed 3/183:16 pm
SAN
-
LAX
1 stop6h 14m
Frontier
Deal found 1/27$110
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/254:40 pm
LAX
-
SAN
1 stop25h 11m
Multiple Airlines
Mon 3/22:00 pm
SAN
-
LAX
1 stop18h 15m
Multiple Airlines
Deal found 1/27$113
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/191:16 pm
LAX
-
SAN
1 stop9h 03m
Frontier
Mon 2/238:20 pm
SAN
-
LAX
1 stop19h 25m
Frontier
Deal found 1/27$114
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 3/121:19 pm
LAX
-
SAN
1 stop4h 19m
Frontier
Wed 3/183:16 pm
SAN
-
LAX
1 stop4h 14m
Frontier
Deal found 1/27$115
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/191:16 pm
LAX
-
SAN
1 stop4h 35m
Frontier
Sun 2/228:10 pm
SAN
-
LAX
1 stop10h 56m
Frontier
Deal found 1/27$117
This Kiwi.com deal was found by Cheapflights users on 1/27. 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 2/242:31 pm
LAX
-
SAN
1 stop7h 10m
Frontier
Tue 3/38:00 am
SAN
-
LAX
1 stop7h 45m
Frontier
Deal found 1/27$118
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 3/2310:33 pm
LAX
-
SAN
1 stop15h 32m
Frontier
Thu 3/269:59 pm
SAN
-
LAX
1 stop10h 21m
Frontier
Deal found 1/28$125
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 3/139:12 am
LAX
-
SAN
1 stop7h 01m
Multiple Airlines
Sun 3/158:39 pm
SAN
-
LAX
1 stop19h 54m
Multiple Airlines
Deal found 1/28$126

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$103
(Kiwi.com)

One-way from

$52
(Kiwi.com)

Popular in

December

Cheapest in

July

Average price

$278
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. 17% potential increase in price ($50 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
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 January 29, 2026.
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

Tue 3/10

6:15 am-9:14 pm

1 stop14h 59m

San Diego

Fri 3/20

9:58 pm-8:11 am

1 stop10h 13m

$138

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 2/25

6:33 pm-11:14 am

2 stops16h 41m

San Diego

Wed 3/4

8:45 am-8:32 pm

1 stop11h 47m

$151

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Thu 2/5

9:17 am-2:01 pm

1 stop4h 44m

San Diego

Sun 2/8

10:51 am-10:25 am

1 stop23h 34m

$151

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Fri 2/20

6:00 am-12:08 am

1 stop18h 08m

San Diego

Sun 2/22

2:52 pm-8:15 am

1 stop17h 23m

$163

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 3/18

8:15 pm-8:59 pm

1 stop24h 44m

San Diego

Tue 3/24

6:25 am-7:30 pm

2 stops13h 05m

$173

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 3/11

8:10 am-9:07 am

Nonstop0h 57m

San Diego

Sun 3/22

6:20 am-7:34 am

Nonstop1h 14m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 3/18

10:43 pm-11:40 pm

Nonstop0h 57m

San Diego

Tue 3/24

11:03 am-12:13 pm

Nonstop1h 10m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Thu 2/26

10:37 pm-11:40 pm

Nonstop1h 03m

San Diego

Thu 3/5

11:03 am-12:13 pm

Nonstop1h 10m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Tue 3/10

8:10 am-9:07 am

Nonstop0h 57m

San Diego

Sun 3/22

6:20 am-7:34 am

Nonstop1h 14m

$179

Los AngelesSan Diego

LAX - SAN

LAXSAN

Los Angeles

Wed 2/25

10:37 pm-11:40 pm

Nonstop1h 03m

San Diego

Wed 3/4

11:05 am-12:17 pm

Nonstop1h 12m

$179

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 22 results
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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 January 23, 2026.

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, July is the cheapest month in which you can book a flight from Riverside to San Diego (average of $85). 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 January 29, 2026.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 23% on flights from Riverside to San Diego by exploring options for tickets in the morning.

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 January 29, 2026.

The most flights from R1V to SAN are scheduled on a Monday (43 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (12 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 January 29, 2026.
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
8,127 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

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
8,127 reviews
Delta
7.9
Good
8,127 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

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
9,215 reviews
Delta
7.9
Good
8,127 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

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
8,394 reviews
Delta
7.9
Good
8,127 reviews

Food

7.2

Boarding

8.1

Comfort

7.9

Crew

8.5

Entertainment

7.8

Overall

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 32 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 16h 41m. 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 ($35), Alaska Airlines ($101), and United Airlines ($134).

  • 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: EL AL (93%), Virgin Australia (85%), Air New Zealand( 85%).

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

    The cheapest flight price from Riverside to San Diego is $134. On average you can expect to pay $261. The most popular route, (Los Angeles - San Diego), can usually be booked for $113.

  • 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, July is the cheapest month in which you can book a flight from Riverside to San Diego (average of $85). 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
National City
Coronado
La Mesa
Poway
Julian
Lemon Grove

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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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$79Average$108FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$179Average$279FlexibilityNo cancel feeOn-time69%
DeltaCheapest$179Average$228FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$182Average$377FlexibilityNo cancel feeOn-time75%

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