$138 Cheap Flights from San Juan (SJU) to San Diego (SAN)

View $138 flight on Fri, Aug 22, 2025Opens in a new window

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to San Diego Intl. Airport (SAN)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from San Juan to San Diego (SJU-SAN)

Prices were available within the past 7 days and start at $138 for one-way flights and $264 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Fri, Aug 22 - Sat, Aug 30
SJU
San Juan
SAN
San Diego
$264 Roundtrip, found 23 hours ago
$264
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Fri, Aug 22 from San Juan to San Diego, returning Sat, Aug 30, priced at $264 found 23 hours ago
United
Fri, Sep 26 - Sat, Sep 27
SJU
San Juan
SAN
San Diego
$271 Roundtrip, found 1 day ago
$271
Roundtrip
found 1 day ago
Select United flight, departing Fri, Sep 26 from San Juan to San Diego, returning Sat, Sep 27, priced at $271 found 1 day ago
American Airlines
Wed, Oct 29 - Mon, Nov 3
SJU
San Juan
SAN
San Diego
$275 Roundtrip, found 1 hour ago
$275
Roundtrip
found 1 hour ago
Select American Airlines flight, departing Wed, Oct 29 from San Juan to San Diego, returning Mon, Nov 3, priced at $275 found 1 hour ago
Delta
Wed, Nov 12 - Sun, Nov 16
SJU
San Juan
SAN
San Diego
$277 Roundtrip, just found
$277
Roundtrip
just found
Select Delta flight, departing Wed, Nov 12 from San Juan to San Diego, returning Sun, Nov 16, priced at $277 just found
Spirit Airlines
Fri, Sep 5 - Tue, Sep 9
SJU
San Juan
SAN
San Diego
$278 Roundtrip, found 13 hours ago
$278
Roundtrip
found 13 hours ago
Select Spirit Airlines flight, departing Fri, Sep 5 from San Juan to San Diego, returning Tue, Sep 9, priced at $278 found 13 hours ago
Delta
Fri, Sep 26 - Wed, Oct 1
SJU
San Juan
SAN
San Diego
$279 Roundtrip, found 1 hour ago
$279
Roundtrip
found 1 hour ago
Select Delta flight, departing Fri, Sep 26 from San Juan to San Diego, returning Wed, Oct 1, priced at $279 found 1 hour ago
United
Fri, Sep 26 - Wed, Oct 1
SJU
San Juan
SAN
San Diego
$281 Roundtrip, found 1 hour ago
$281
Roundtrip
found 1 hour ago
Select United flight, departing Fri, Sep 26 from San Juan to San Diego, returning Wed, Oct 1, priced at $281 found 1 hour ago
United
Sat, Nov 1 - Sun, Nov 9
SJU
San Juan
SAN
San Diego
$283 Roundtrip, found 1 day ago
$283
Roundtrip
found 1 day ago
Select United flight, departing Sat, Nov 1 from San Juan to San Diego, returning Sun, Nov 9, priced at $283 found 1 day ago
Spirit Airlines
Fri, Nov 7 - Tue, Nov 11
SJU
San Juan
SAN
San Diego
$284 Roundtrip, found 12 hours ago
$284
Roundtrip
found 12 hours ago
Select Spirit Airlines flight, departing Fri, Nov 7 from San Juan to San Diego, returning Tue, Nov 11, priced at $284 found 12 hours ago
Alaska Airlines
Tue, Oct 7 - Sun, Oct 19
SJU
San Juan
SAN
San Diego
$351 Roundtrip, found 13 hours ago
$351
Roundtrip
found 13 hours ago
Select Alaska Airlines flight, departing Tue, Oct 7 from San Juan to San Diego, returning Sun, Oct 19, priced at $351 found 13 hours ago

Find the cheapest month to fly from San Juan (SJU) to San Diego (SAN)

May is typically the cheapest month to fly

From $229 - $491 per traveler.

Graph displaying average flight prices per month

Alternative airports near San Diego

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to San Diego Intl. SAN. Cheapest and Closest option available. Average driving time to city center is 5 minutes. Flights from $632
SAN
San Diego Intl.
CheapestClosest
Average driving time to city center5 min
Flights from $632
Flights from San Juan (SJU) to Carlsbad (CLD)
Origin airport
Luis Munoz Marin Intl.
Destination airport
McClellan-Palomar
Airlines serving
Alaska Airlines, American Airlines, Delta, JetBlue Airways, Southwest Airlines, Spirit Airlines, United
Roundtrip price
$245
Distance
3312 mi

San Juan to San Diego Flights

The cheapest times to fly from San Juan to San Diego

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from San Juan to San Diego are during the month of August. You can find some of the cheapest flights from San Juan to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from San Juan to San Diego

Sunday is one of the best days to book for cheap flights from San Juan to San Diego: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from San Juan to San Diego

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from San Juan to San Diego in 2025. You can also book with separate airlines for your outbound and return journeys, from $138 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap San Juan to San Diego flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your San Juan to San Diego airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Luis Munoz Marin Intl. Airport (SJU) to San Diego Intl. Airport (SAN) cost?
Discover the latest flight deals from SJU to SAN by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SJU to SAN?
The cheapest flights from SJU to SAN are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SJU to SAN?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SJU to SAN. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Luis Munoz Marin Intl. Airport (SJU) to San Diego Intl. Airport (SAN)?
You'll need to book a flight with a layover if you're traveling from Luis Munoz Marin Intl. Airport (SJU) to San Diego Intl. Airport (SAN). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to find the best option for your trip.
What day of the week has the most flights from SJU to SAN?
Usually you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can change based on the time of year, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Luis Munoz Marin Intl. Airport (SJU) to San Diego Intl. Airport (SAN)?
Select a flight from Luis Munoz Marin Intl. Airport (SJU) to San Diego Intl. Airport (SAN) that takes off before 3 PM to reduce the risk of cancellations and delays. Departures after this hour are on average 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Luis Munoz Marin Intl. Airport (SJU) to San Diego Intl. Airport (SAN) last-minute?
Last-minute bookings from SJU to SAN are usually more expensive. For the best rates, start looking for flights well in advance. That said, if you can play around with your travel dates, you may score a cheap fare right before you leave.
Is it cheaper to book a SJU to SAN flight and hotel package?
You'll typically save money by booking a SJU to SAN flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one convenient place. Once you've selected your ideal accommodations and flights, you can add extras such as activities, car rentals and tours.
Can I cancel or change the date of my flight from Luis Munoz Marin Intl. Airport (SJU) to San Diego Intl. Airport (SAN)?
If you booked your SJU to SAN flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal for further details.

Explore a world of travel with Expedia

*Available to One Key members.