HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
San Juan

$138+ 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
SAN — SJU
ago. 25 — sep. 11
lun. 8/25
lun. 9/1
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Diego to San Juan with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from San Diego to San Juan are usually found in September or October, 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 agosto 20, 2025.

Round-trip from

$303
(FlightHub)

One-way from

$138
(Delta)

Popular in

December

Cheapest in

September

Average price

$561
From San Diego to San Juan
Search Deals
One-way flight from San Diego to San Juan
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($40 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

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 agosto 20, 2025.

This FlightHub deal was found by Cheapflights users on 8/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 9/177:47 pmSAN - SJU
2 stops14h 56mSpirit Airlines
lun. 9/2210:42 amSJU - SAN
2 stops14h 44mSpirit Airlines
Deal found 8/20$303
This FlightHub deal was found by Cheapflights users on 8/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 9/256:15 amSAN - SJU
2 stops15h 39mSpirit Airlines
lun. 9/2910:42 amSJU - SAN
2 stops14h 44mSpirit Airlines
Deal found 8/19$313
This United Airlines deal was found by Cheapflights users on 8/20. 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.
mar. 9/236:15 amSAN - SJU
2 stops14h 42mUnited Airlines
mar. 9/302:55 pmSJU - SAN
1 stop9h 50mUnited Airlines
Deal found 8/20$315
This American Airlines deal was found by Cheapflights users on 8/19. 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.
jue. 9/259:19 pmSAN - SJU
1 stop15h 33mAmerican Airlines
lun. 9/293:05 pmSJU - SAN
1 stop20h 19mAmerican Airlines
Deal found 8/19$318
This United Airlines deal was found by Cheapflights users on 8/19. 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.
mié. 9/1710:40 pmSAN - SJU
1 stop10h 20mUnited Airlines
mar. 9/231:05 amSJU - SAN
2 stops15h 35mUnited Airlines
Deal found 8/19$320
This Delta deal was found by Cheapflights users on 8/18. 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.
vie. 10/249:48 pmSAN - SJU
1 stop10h 48mDelta
vie. 11/73:36 pmSJU - SAN
1 stop11h 38mDelta
Deal found 8/18$321
This FlightHub deal was found by Cheapflights users on 8/20. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 9/267:47 pmSAN - SJU
2 stops39h 30mSpirit Airlines
lun. 9/2910:42 amSJU - SAN
2 stops14h 44mSpirit Airlines
Deal found 8/20$331
This Mytrip deal was found by Cheapflights users on 8/19. 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.
mié. 9/177:47 pmSAN - SJU
2 stops14h 56mSpirit Airlines
mié. 9/246:44 amSJU - SAN
3 stops27h 45mSpirit Airlines
Deal found 8/19$332
This Mytrip deal was found by Cheapflights users on 8/18. 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.
lun. 9/296:15 amSAN - SJU
3 stops35h 41mSpirit Airlines
dom. 10/53:19 pmSJU - SAN
2 stops19h 07mSpirit Airlines
Deal found 8/18$336
This Mytrip deal was found by Cheapflights users on 8/19. 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.
jue. 10/236:15 amSAN - SJU
2 stops15h 21mSpirit Airlines
lun. 10/273:19 pmSJU - SAN
3 stops34h 58mSpirit Airlines
Deal found 8/19$337

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 agosto 20, 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

mié. 9/17

7:47 pm-1:43 pm

2 stops14h 56m

San Juan Luis Munoz Marin Intl

lun. 9/22

10:42 am-10:26 pm

2 stops14h 44m

$303

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

jue. 9/25

6:15 am-12:54 am

2 stops15h 39m

San Juan Luis Munoz Marin Intl

lun. 9/29

10:42 am-10:26 pm

2 stops14h 44m

$313

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

mar. 9/23

6:15 am-8:38 pm

2 stops11h 23m

San Juan Luis Munoz Marin Intl

mar. 9/30

2:00 pm-11:41 pm

2 stops12h 41m

$315

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

mié. 9/24

3:01 pm-11:11 am

2 stops17h 10m

San Juan Luis Munoz Marin Intl

mié. 10/1

4:43 pm-9:27 am

1 stop19h 44m

$318

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

jue. 9/25

9:19 pm-3:52 pm

1 stop15h 33m

San Juan Luis Munoz Marin Intl

lun. 9/29

4:43 pm-10:20 am

1 stop20h 37m

$318

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

mar. 1/27

6:23 am-8:50 pm

1 stop10h 27m

San Juan Luis Munoz Marin Intl

sáb. 1/31

7:20 am-8:00 pm

1 stop16h 40m

$318

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

vie. 9/26

5:15 pm-2:15 pm

1 stop18h 00m

San Juan Luis Munoz Marin Intl

lun. 9/29

4:43 pm-10:20 am

1 stop20h 37m

$318

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

mié. 9/17

10:40 pm-12:00 pm

1 stop10h 20m

San Juan Luis Munoz Marin Intl

mar. 9/23

1:05 am-1:40 pm

2 stops15h 35m

$320

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

jue. 9/25

6:30 pm-12:00 pm

2 stops14h 30m

$138

San DiegoSan Juan

SAN - SJU

SANSJU

San Diego

mié. 11/12

6:30 am-11:47 pm

1 stop13h 17m

$138

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

Showing 1-10 of 14 results
1
2

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 August 8, 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 agosto 20, 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 agosto 20, 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

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,928 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Crew

8.5

Comfort

7.8

Entertainment

7.0

Overall

8.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

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 11h 23m. Fly via Spirit Airlines 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 $168. Other airlines that can offer you cheap pricing are Frontier, from $225, and JetBlue, from $280. These flights start at 67% lower than the current average price 3 months from now.

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

    $138 is the cheapest one-way deal found within the past few days, from United Airlines. You may also be able to find cheap deals on American Airlines and Delta, with prices starting from $138 and $138, respectively.

  • 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 $51.

  • 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Diego to San Juan

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to Luis Munoz Marin Intl flights
San Francisco to Luis Munoz Marin Intl flights
Ontario to Luis Munoz Marin Intl flights
San Diego to Luis Munoz Marin Intl flights
Burbank to Luis Munoz Marin Intl flights
Las Vegas to Luis Munoz Marin Intl flights
Santa Ana to Luis Munoz Marin Intl flights
Sacramento to Luis Munoz Marin Intl flights
San Jose to Luis Munoz Marin Intl flights
Oakland to Luis Munoz Marin Intl flights
Fresno to Luis Munoz Marin Intl flights
Los Angeles to Ponce flights
Palm Springs to Luis Munoz Marin Intl flights
Los Angeles to Aguadilla flights
San Francisco to Ponce flights
Reno to Luis Munoz Marin Intl flights
Long Beach to Luis Munoz Marin Intl flights
Medford to Luis Munoz Marin Intl flights
Las Vegas to Aguadilla flights
San Diego to Aguadilla flights
San Francisco to Aguadilla flights
San Luis Obispo to Luis Munoz Marin Intl flights
Santa Rosa to Luis Munoz Marin Intl flights
Ontario to Aguadilla flights
San Jose to Aguadilla flights
Los Angeles to Culebra flights
San Diego to Ponce flights
San Francisco to Mayagüez flights
San Francisco to Culebra flights
Sacramento to Aguadilla flights
San Jose to Mayagüez flights
Las Vegas to Ponce flights
San Jose to Culebra flights
Las Vegas to Culebra flights
San Jose to Vieques flights
Sacramento to Culebra flights
Santa Ana to Aguadilla flights
San Francisco to Vieques flights
Los Angeles to Mayagüez flights
Los Angeles to Vieques flights
San Diego to Culebra flights
Reno to Aguadilla flights

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 agosto 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$168Average$349FlexibilityNo cancel feeOn-time65%
FrontierCheapest$225Average$418FlexibilityNo cancel feeOn-time62%
JetBlueCheapest$280Average$446FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$319Average$488FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$322Average$528FlexibilityNo cancel feeOn-time71%
DeltaCheapest$352Average$587FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$382Average$593FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$473Average$584FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.