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$135+ 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 9/7. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SJU
Aug 3 — Aug 101
Sun 8/3
Sun 8/10
1 adult, Economy
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Cheapflights Tip: The best prices from San Francisco to San Juan are usually found in September or January, booked 76 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 July 29, 2025.

Round-trip from

$298
(Frontier)

One-way from

$135
(CheapOair)

Popular in

December

Cheapest in

September

Average price

$549
From San Francisco to San Juan
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One-way flight from San Francisco to San Juan
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Highest demand for flights based on searches. 10% potential increase in price ($56 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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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 July 29, 2025.

This Frontier deal was found by Cheapflights users on 7/28. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/98:53 pmSFO - SJU
1 stop9h 11mFrontier
Sat 8/169:30 pmSJU - SFO
1 stop15h 55mFrontier
Deal found 7/28$298
This JetBlue deal was found by Cheapflights users on 7/29. 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.
Fri 10/317:45 amSFO - SJU
1 stop10h 44mJetBlue
Wed 11/1212:45 pmSJU - SFO
1 stop15h 29mJetBlue
Deal found 7/29$358
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Thu 10/99:00 pmSFO - SJU
1 stop12h 00mUnited Airlines
Fri 10/102:00 pmSJU - SFO
1 stop11h 57mUnited Airlines
Deal found 7/29$364
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/209:38 pmSFO - SJU
1 stop12h 38mDelta
Fri 9/2612:58 pmSJU - SFO
2 stops13h 52mDelta
Deal found 7/28$369
This American Airlines deal was found by Cheapflights users on 7/27. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/1511:59 pmSFO - SJU
1 stop15h 16mAmerican Airlines
Wed 8/206:00 amSJU - SFO
1 stop19h 59mAmerican Airlines
Deal found 7/27$392
This Southwest deal was found by Cheapflights users on 7/29. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/87:50 pmSFO - SJU
2 stops12h 00mSouthwest
Mon 9/225:50 amSJU - SFO
1 stop17h 20mSouthwest
Deal found 7/29$411

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 July 29, 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

Sat 8/9

8:53 pm-9:04 am

1 stop9h 11m

San Juan Luis Munoz Marin Intl

Sat 8/16

9:30 pm-10:25 am

1 stop15h 55m

$298

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Thu 10/9

9:00 pm-12:00 pm

1 stop12h 00m

San Juan Luis Munoz Marin Intl

Fri 10/10

2:00 pm-10:57 pm

1 stop11h 57m

$364

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sat 9/20

9:38 pm-1:16 pm

1 stop12h 38m

San Juan Luis Munoz Marin Intl

Fri 9/26

12:58 pm-11:50 pm

2 stops13h 52m

$369

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Tue 9/16

6:15 am-9:24 pm

1 stop12h 09m

San Juan Luis Munoz Marin Intl

Fri 9/26

1:00 pm-11:59 pm

1 stop13h 59m

$370

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Fri 8/15

11:59 pm-6:15 pm

1 stop15h 16m

San Juan Luis Munoz Marin Intl

Wed 8/20

6:00 am-10:59 pm

1 stop19h 59m

$392

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Mon 9/8

7:50 pm-10:50 am

2 stops12h 00m

San Juan Luis Munoz Marin Intl

Mon 9/22

5:50 am-8:10 pm

1 stop17h 20m

$411

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Sun 9/7

11:00 pm-2:11 pm

1 stop12h 11m

$135

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Wed 10/1

11:20 pm-1:54 pm

1 stop11h 34m

$166

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Mon 9/22

11:25 pm-2:53 pm

2 stops12h 28m

$185

San FranciscoSan Juan

SFO - SJU

SFOSJU

San Francisco

Thu 9/25

12:43 am-3:42 pm

1 stop11h 59m

$197

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 14 results
1
2

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 July 25, 2025.

The best time to book flights from San Francisco to San Juan is 76 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 July 29, 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.

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 July 29, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

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

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

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
4,238 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

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
7,977 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

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
8,899 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

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

Boarding

8.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Food

7.1

Overall

8.0

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 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.

  • 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 $298. Other airlines that can offer you cheap pricing are United Airlines, from $364, and Delta, from $369. These flights start at 40% lower than the current average price 3 months from now.

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

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $135. JetBlue flights start at $166 while deals on American Airlines start at $185 one-way.

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

    San Francisco to San Juan flights have a layover in Fort Lauderdale most of the time. Charlotte follows Fort Lauderdale in terms of the most common layover location on San Francisco to San Juan flights. Miami follows Charlotte in terms of the most frequent layover location on San Francisco to San Juan flights.

  • 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 $25 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 $49 per day.

  • What are points of interest worth seeing during a layover in Miami?

    If you're on a layover in Miami and looking for things to do, consider visiting Wynwood Art District, Bayfront Park, or Bayside Marketplace. Wynwood Art District, Bayfront Park, and Bayside Marketplace are located about 5.5 mi, 6.4 mi, and 6.4 mi, respectively from Miami. Those landing in Miami looking to spend some time exploring during their layover can rent a car for about $25 per day.

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

    The least popular layover on flights from San Francisco to San Juan is Denver. New York is the second least popular location for layovers on flights from San Francisco to San Juan. Dallas follows New York in terms of the least frequent layover locations on 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.

See more FAQs

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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 July 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$160Average$334FlexibilityNo cancel feeOn-time62%
DeltaCheapest$242Average$639FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$288Average$464FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$337Average$904FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$342Average$542FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$343Average$530FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$486Average$675FlexibilityNo cancel feeOn-time63%

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