San Juan

$133+ Cheap flights from San Francisco (SFO) 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 11/9. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SJU
Oct 11 — Oct 181
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Cheapflights Tip: The best prices from San Francisco to San Juan are usually found in May or January, booked 66 days in advance, depart on a Tuesday or Sunday and return on a Saturday

Cheap flight deals from San Francisco to San Juan

Discover tips and strategies to find the most affordable flight options for your journey from San Francisco (SFO) 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 11, 2025.

Round-trip from

$320
(Frontier)

One-way from

$133
(Kiwi.com)

Popular in

December

Cheapest in

May

Average price

$456
From San Francisco to San Juan
One-way flight from San Francisco to San Juan
Highest demand for flights based on searches. 7% potential increase in price ($40 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Average for round-trip flights in September 2025

Find flight deals from San Francisco to San Juan

Cheapest flights from San Francisco to San Juan
Explore the most affordable flight options available from San Francisco to San Juan. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Frontier deal was found by Cheapflights users on 9/10. 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 9/2211:57 pmSFO - SJU
2 stops17h 34mFrontier
Fri 9/269:26 pmSJU - SFO
2 stops18h 49mFrontier
Deal found 9/10$320
This Kiwi.com deal was found by Cheapflights users on 9/10. 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.
Sat 9/2011:00 pmSFO - SJU
1 stop12h 11mMultiple Airlines
Fri 10/37:40 pmSJU - SFO
2 stops39h 35mMultiple Airlines
Deal found 9/10$321
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Sat 10/2510:23 pmSFO - SJU
1 stop12h 46mMultiple Airlines
Sat 11/15:18 pmSJU - SFO
1 stop22h 57mMultiple Airlines
Deal found 9/11$322
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 9/2611:00 pmSFO - SJU
1 stop12h 11mMultiple Airlines
Fri 10/37:40 pmSJU - SFO
2 stops39h 35mMultiple Airlines
Deal found 9/10$323
This Kiwi.com deal was found by Cheapflights users on 9/11. 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.
Sun 10/2610:23 pmSFO - SJU
1 stop12h 43mMultiple Airlines
Sun 11/26:18 pmSJU - SFO
1 stop21h 52mMultiple Airlines
Deal found 9/11$327
This Frontier deal was found by Cheapflights users on 9/11. 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 10/2510:23 pmSFO - SJU
1 stop12h 46mFrontier
Wed 10/299:00 amSJU - SFO
2 stops16h 27mFrontier
Deal found 9/11$328
This Frontier deal was found by Cheapflights users on 9/10. 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.
Fri 9/2611:00 pmSFO - SJU
1 stop12h 11mFrontier
Fri 10/39:26 pmSJU - SFO
2 stops18h 49mFrontier
Deal found 9/10$329
This CheapOair deal was found by Cheapflights users on 9/10. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2511:20 pmSFO - SJU
1 stop11h 34mJetBlue
Tue 9/3012:15 pmSJU - SFO
1 stop13h 55mJetBlue
Deal found 9/10$330
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 10/2410:23 pmSFO - SJU
1 stop13h 05mMultiple Airlines
Fri 10/318:00 amSJU - SFO
2 stops19h 14mMultiple Airlines
Deal found 9/9$333
This JetBlue deal was found by Cheapflights users on 9/10. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/2911:20 pmSFO - SJU
1 stop11h 34mJetBlue
Sun 10/53:03 amSJU - SFO
1 stop11h 50mJetBlue
Deal found 9/10$335
This Kiwi.com deal was found by Cheapflights users on 9/9. 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.
Sat 11/110:23 pmSFO - SJU
1 stop13h 56mFrontier
Fri 11/72:11 amSJU - SFO
2 stops24h 16mFrontier
Deal found 9/9$337
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 11/1310:23 pmSFO - SJU
1 stop12h 56mMultiple Airlines
Mon 11/176:00 amSJU - SFO
2 stops22h 14mMultiple Airlines
Deal found 9/9$338

Cheapflights Fare Finder

 
Customize your flight search to find flights from San Francisco 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 11, 2025.
Use the filters below to find and compare flights from San Francisco to San Juan that are best for you.

Fly from

San Francisco

Fly to

San Juan

Route

Depart

Return

Price

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 10/31

9:50 pm-11:36 am

1 stop10h 46m

San Juan Luis Munoz Marin Intl

Wed 11/12

7:00 am-6:14 pm

1 stop15h 14m

$339

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 10/28

12:35 am-4:33 pm

2 stops12h 58m

San Juan Luis Munoz Marin Intl

Sat 11/1

2:31 pm-10:30 pm

1 stop10h 59m

$339

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 10/21

8:00 am-9:24 pm

1 stop10h 24m

San Juan Luis Munoz Marin Intl

Wed 11/5

12:30 pm-11:59 pm

1 stop15h 29m

$356

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Mon 10/20

10:00 pm-12:27 pm

1 stop11h 27m

San Juan Luis Munoz Marin Intl

Wed 11/5

12:30 pm-11:59 pm

1 stop15h 29m

$356

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 11/12

6:00 am-11:13 pm

2 stops13h 13m

San Juan Luis Munoz Marin Intl

Fri 11/21

2:10 pm-1:12 am

1 stop15h 02m

$362

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 11/1

5:30 pm-12:56 pm

2 stops16h 26m

San Juan Luis Munoz Marin Intl

Wed 11/5

7:00 am-7:30 pm

2 stops16h 30m

$385

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 11/1

4:45 pm-12:56 pm

2 stops17h 11m

San Juan Luis Munoz Marin Intl

Sat 11/8

7:00 am-7:05 pm

2 stops16h 05m

$385

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Mon 10/20

12:35 am-4:25 pm

2 stops12h 50m

San Juan Luis Munoz Marin Intl

Sat 10/25

2:22 pm-10:35 pm

1 stop11h 13m

$385

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 10/29

5:00 am-5:25 pm

1 stop9h 25m

San Juan Luis Munoz Marin Intl

Fri 10/31

1:05 am-10:22 am

1 stop12h 17m

$389

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 12/3

6:00 am-9:00 pm

1 stop11h 00m

San Juan Luis Munoz Marin Intl

Mon 12/8

3:46 pm-11:59 pm

1 stop12h 13m

$389

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 21 results
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Best time to book a flight from San Francisco to San Juan

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

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

Use this chart to determine the optimal time to book a round-trip flight from San Francisco to San Juan. Price data was last updated on August 29, 2025.

The best time to book flights from San Francisco to San Juan is 66 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, September is the cheapest month in which you can book a flight from San Francisco to San Juan (average of $254). Flying from San Francisco 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 SFO to SJU?

Find hourly flight availability from San Francisco 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 11, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 32% on flights from San Francisco to San Juan by exploring options for tickets at noon.

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

Use this chart to determine the cheapest time to fly round-trip from San Francisco to San Juan. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Francisco to San Juan flight should consider departing on Thursday at noon when fares are most often at their lowest. Friday mornings 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 Francisco 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 11, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American Airlines from San Francisco to San Juan to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good
8.0
Very good

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
8.0
Very good

Entertainment

7.9

Food

7.3

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from San Francisco 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 Francisco to San Juan?

    If you book a flight to San Juan from San Francisco, you will be flying from San Francisco, which is the city’s only airport. San Francisco (SFO) is located 11.8 mi from the center of San Francisco. There are 0 flights from San Francisco to San Juan per day from 7 different airlines.

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

    A quick flight from San Francisco to San Juan can take about 10h 24m. Delta provides one of the quickest options available for as low as $356. San Francisco and San Juan are separated by a distance of 3623 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Cheapflights users have booked flights from San Francisco to San Juan round-trip from $160. Other airlines that can offer you cheap pricing are Delta, from $240, and Sun Country Air, from $286. These flights start at 67% lower than the current average price 3 months from now.

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

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

    Las Olas Beach, Port Everglades, and Fort Lauderdale Beach Park are the most popular attractions in Fort Lauderdale if you're in need of something to do during your layover. Las Olas Beach, Port Everglades, and Fort Lauderdale Beach Park can be accessed by traveling approximately 4.1 mi, 2.1 mi, and 4.2 mi, respectively from Fort Lauderdale. Travelers can book a car rental at Fort Lauderdale for about $23 per day to make their sightseeing more efficient.

  • What are some popular points of interest to see during a layover in Charlotte?

    The majority of Charlotte visitors spend their time at Carowind, Mint Museum Uptown, and NASCAR Hall of Fame. Those on a layover in Charlotte interested in visiting Carowind, Mint Museum Uptown, or NASCAR Hall of Fame can do so by traveling 8.2 mi, 5.4 mi, and 5.7 mi, respectively from Charlotte Douglas. Those looking to explore during their layover in Charlotte can rent a car from Charlotte Douglas for about $44 per day.

  • What are points of interest worth seeing during 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 are located about 15.0 mi, 15.5 mi, and 18.3 mi, respectively from Dallas/Fort Worth. Those landing in Dallas looking to spend some time exploring during their layover can rent a car for about $50 per day.

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

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

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

  • How can I find direct flights from San Francisco 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 Francisco to San Juan.

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

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

    Currently, September is the cheapest month in which you can book a flight from San Francisco to San Juan (average of $254). Flying from San Francisco 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.

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Alternative routes for San Francisco to San Juan

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from San Francisco to San Juan

Discover the top 7 airlines that operate flights from San Francisco 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 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$160Average$330FlexibilityNo cancel feeOn-time62%
DeltaCheapest$240Average$603FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$286Average$994FlexibilityNo cancel feeOn-time83%
JetBlueCheapest$297Average$475FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$346Average$533FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$355Average$554FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$486Average$660FlexibilityNo cancel feeOn-time63%

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