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$148+ Cheap flights from San Diego (SAN) to San Juan

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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SJU
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheapflights Tip: The best prices from San Diego to San Juan are usually found in October or January, booked 19 days in advance, depart on a Saturday or Tuesday and return on a Thursday

Cheap flight deals from San Diego to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to San Juan (PR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 17, 2025.

Round-trip from

$295
(United Airlines)

One-way from

$148
(Delta)

Popular in

December

Cheapest in

October

Average price

$453
From San Diego to San Juan
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One-way flight from San Diego to San Juan
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Highest demand for flights based on searches. 7% potential increase in price ($41 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 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 San Diego to San Juan

Cheapest flights from San Diego to San Juan
Explore the most affordable flight options available from San Diego to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This United Airlines deal was found by Cheapflights users on 9/16. 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 10/2710:18 pmSAN - SJU
1 stop10h 31mUnited Airlines
Wed 11/57:45 amSJU - SAN
2 stops13h 44mUnited Airlines
Deal found 9/16$295
This American Airlines deal was found by Cheapflights users on 9/17. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/176:20 amSAN - SJU
1 stop14h 39mAmerican Airlines
Thu 10/235:30 amSJU - SAN
1 stop16h 17mAmerican Airlines
Deal found 9/17$298
This United Airlines deal was found by Cheapflights users on 9/17. 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 10/149:20 pmSAN - SJU
1 stop11h 40mUnited Airlines
Tue 10/211:30 pmSJU - SAN
2 stops13h 11mUnited Airlines
Deal found 9/17$319
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/277:43 pmSAN - SJU
2 stops19h 11mFrontier
Sun 11/22:03 amSJU - SAN
2 stops13h 14mFrontier
Deal found 9/15$321
This Frontier deal was found by Cheapflights users on 9/16. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/226:41 amSAN - SJU
2 stops16h 49mFrontier
Fri 10/319:00 amSJU - SAN
2 stops17h 50mFrontier
Deal found 9/16$333
This American Airlines deal was found by Cheapflights users on 9/15. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1010:23 pmSAN - SJU
2 stops11h 20mAmerican Airlines
Mon 11/176:25 amSJU - SAN
1 stop16h 34mAmerican Airlines
Deal found 9/15$334
This Frontier deal was found by Cheapflights users on 9/15. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/72:11 pmSAN - SJU
2 stops19h 04mFrontier
Wed 10/156:22 amSJU - SAN
2 stops20h 28mFrontier
Deal found 9/15$338
This Frontier deal was found by Cheapflights users on 9/17. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/258:00 amSAN - SJU
2 stops15h 30mFrontier
Fri 10/319:00 amSJU - SAN
2 stops17h 50mFrontier
Deal found 9/17$355
This United Airlines deal was found by Cheapflights users on 9/17. 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 10/1710:30 pmSAN - SJU
1 stop10h 30mUnited Airlines
Fri 10/242:00 pmSJU - SAN
2 stops13h 15mUnited Airlines
Deal found 9/17$363

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Diego to San Juan 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 17, 2025.
Use the filters below to find and compare flights from San Diego to San Juan that are best for you.

Fly from

San Diego

Fly to

San Juan

Route

Depart

Return

Price

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

Fri 10/24

8:00 am-9:59 pm

1 stop10h 59m

San Juan Luis Munoz Marin Intl

Tue 11/4

7:15 am-8:34 pm

2 stops17h 19m

$334

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

Mon 10/27

10:18 pm-1:40 pm

1 stop12h 22m

San Juan Luis Munoz Marin Intl

Tue 11/4

2:05 am-10:05 am

1 stop12h 00m

$341

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

Sat 1/31

7:00 am-12:36 am

2 stops13h 36m

San Juan Luis Munoz Marin Intl

Fri 2/6

2:05 am-12:27 pm

1 stop14h 22m

$385

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

Tue 10/7

8:08 pm-1:45 pm

2 stops14h 37m

San Juan Luis Munoz Marin Intl

Sat 10/11

1:05 am-9:33 am

1 stop11h 28m

$388

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

Tue 12/2

9:55 pm-1:17 pm

1 stop11h 22m

San Juan Luis Munoz Marin Intl

Mon 12/8

7:45 am-4:16 pm

1 stop12h 31m

$399

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

Fri 12/5

10:34 pm-2:40 pm

1 stop12h 06m

San Juan Luis Munoz Marin Intl

Tue 12/9

2:05 am-9:59 am

1 stop11h 54m

$433

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

Tue 1/6

7:55 pm-11:20 am

2 stops11h 25m

San Juan Luis Munoz Marin Intl

Tue 1/27

12:10 pm-9:10 pm

2 stops13h 00m

$440

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

Sat 10/4

3:35 pm-12:13 pm

2 stops17h 38m

San Juan Luis Munoz Marin Intl

Tue 10/7

7:15 am-8:34 pm

2 stops16h 19m

$460

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

Sun 1/18

8:37 pm-1:17 pm

2 stops12h 40m

San Juan Luis Munoz Marin Intl

Sat 1/24

2:05 am-10:04 am

1 stop11h 59m

$461

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

Fri 10/17

7:10 pm-11:36 am

2 stops13h 26m

$148

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 18 results
1
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Best time to book a flight from San Diego to San Juan

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

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

Use this chart to determine the optimal time to book a round-trip flight from San Diego to San Juan. Price data was last updated on September 12, 2025.

The price you pay for your flight from San Diego to San Juan may vary depending on when you book. For the best chance of a lower fare, look to book 19 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from San Diego to San Juan?

Currently, September is the cheapest month in which you can book a flight from San Diego to San Juan (average of $254). Flying from San Diego to San Juan in June is currently the most expensive (average of $339). 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 SAN to SJU?

Find hourly flight availability from San Diego to San Juan. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

It’s typically best to fly out from San Diego to San Juan at noon. Doing so could potentially save you 15% on the flight price compared to flying in the afternoon, which is usually more expensive.

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

Use this chart to determine the cheapest time to fly round-trip from San Diego to San Juan. Price data was last updated on September 22, 2024.

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

How much does it cost to fly round-trip from San Diego to San Juan?

Reviews of airlines servicing San Juan

Get insights into the airlines that provide service to San Juan. 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 Juan. Reviews last updated September 17, 2025.
See what other customers who have flown with Alaska Airlines, Southwest, and Delta from San Diego to San Juan have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Southwest
8.0
Very good
4,242 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,961 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
United Airlines
7.4
Good
8,926 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Crew

8.5

Overall

8.0

Food

7.1

Comfort

7.8

Entertainment

7.1

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

Related info for your journey

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

    San Diego (SAN) is the airport you will fly out of if you book a flight from San Diego to San Juan. You should not have trouble finding flights to San Juan from San Diego; the airport handles an average of 0 outbound flights to San Juan per day. You should also have plenty of airline options to choose from since 8 airlines have flights from the San Diego airport to San Juan. It is only a 2.6 mi journey to San Diego (SAN) from San Diego’s city center.

  • How long is the flight from San Diego to San Juan?

    There are many flights that can get you from San Diego to San Juan in 10h 59m. Fly via Delta or United Airlines to get the fastest option. There are 3304 mi between San Diego and San Juan. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from San Diego to San Juan round-trip?

    Cheapflights users have booked flights from San Diego to San Juan round-trip from $125. Other airlines that can offer you cheap pricing are Frontier, from $225, and Delta, from $285. These flights start at 76% lower than the current average price 3 months from now.

  • Where are the most common layover locations when flying from San Diego to San Juan?

    The most popular layover on flights from San Diego to San Juan is Dallas.

  • What are some popular things to do or see while on a layover in Dallas?

    If you're on a layover in Dallas and looking for things to do, consider visiting American Airlines Center, Dallas World Aquarium, or Dos Equis Pavilion. American Airlines Center, Dallas World Aquarium, and Dos Equis Pavilion can be visited by traveling about 15.0 mi, 15.5 mi, and 18.3 mi respectively from Dallas/Fort Worth. Those on a layover in Dallas in need of a rental car can book one at Dallas/Fort Worth for about $48.

  • Where are the least popular layover locations for San Diego to San Juan flights?

    The least popular layover on flights from San Diego to San Juan is Miami.

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

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

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

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

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

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

    Currently, September is the cheapest month in which you can book a flight from San Diego to San Juan (average of $254). Flying from San Diego to San Juan in June is currently the most expensive (average of $339). 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

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Top 8 airlines flying from San Diego to San Juan

Discover the top 8 airlines that operate flights from San Diego to San Juan. 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 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$125Average$354FlexibilityNo cancel feeOn-time65%
FrontierCheapest$225Average$418FlexibilityNo cancel feeOn-time62%
DeltaCheapest$285Average$567FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$306Average$461FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$317Average$494FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$323Average$538FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$382Average$598FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$474Average$584FlexibilityNo cancel feeOn-time75%

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