Cheap Flights from San Francisco International to San Juan

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Flight deals from San Francisco International to San Juan

Looking for a cheap last-minute deal or the best return flight from San Francisco International to San Juan? Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from San Francisco International to San Juan

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like San Francisco International to San Juan flights are currently cheapest in May.

Alternative San Francisco International to San Juan routes

Looking for the cheapest, fastest or easiest route from San Francisco International to San Juan? You could fly into the following airports instead.

San Francisco to San Juan: Flight information

The things to know before you go.
Cheapest flight foundR 3,066
Cheapest month to flyMay

Finding cheap flights from San Francisco International to San Juan: Frequently asked questions

There are 6 airports in San Juan: San Juan Isla Grande, San Juan Luis Munoz Marin, Roosevelt Roads, Ponce, Vieques, and Culebra.
The best price we found for a return flight from San Francisco International to San Juan is R 6,394. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from San Francisco International to San Juan. But we found flights with one or more stops from R 6,394.
As of April 2025, there are no flights flying from San Francisco International to San Juan.
The cheapest month to fly from San Francisco International to San Juan is usually April 2025.
If you're flying from San Francisco International Airport, the cheapest airport near San Juan is San Juan Luis Munoz Marin – which is 11.3 km away from the centre of San Juan. We've found flights into this airport from R 6,394.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from San Francisco International Airport to San Juan on Tuesday, 18 November 2025.
No airlines currently offer direct flights between San Francisco International Airport and San Juan. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Juan but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Juan is around 40 days in advance, so don’t leave your flight to the last minute.
In April, the average temperature is usually around 26°C. August is typically the warmest month in San Juan, when it usually averages around 29°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging 23°C. The rainiest month is September.
Currently, United offers the cheapest flight tickets to San Juan.

Flying from San Francisco International Airport (SFO) to San Juan: what you need to know

  • The timezone in San Juan is UTC-4. The city is 3 hours ahead of San Francisco, where San Francisco International Airport is located.

  • For a stress-free journey, arrive at the airport two hours ahead of international flights and one hour before domestic departures. This way, you can comfortably catch your flight from SFO to San Juan.

  • If you're travelling during a popular month like August, arrive at the terminal even earlier. It's smart to arrive up to four hours before international flights and two hours ahead of domestic departures. Expect lines to be longer during high seasons like spring break and summer.

  • Think about adding a stopover to possibly find a cheaper flight from SFO to San Juan. Simply uncheck 'Direct flights only' when searching for the departures. Take a break from travelling at one of these popular airports:

    • Fort Lauderdale-Hollywood International Airport (FLL)

    • Denver International Airport (DEN)

    • Miami International Airport (MIA)

  • You won't need a visa for Puerto Rico if you hold a passport from United States and are travelling for tourism purposes. Travel documentation and visa requirements are subject to changes. So before locking in your cheap tickets from San Francisco International Airport to San Juan, be sure to check with your airline and your destination country's local consulate or embassy for up-to-date information.

  • Located around 21 kilometres from the centre of San Francisco, SFO can be reached in about 20 minutes by car (depending on traffic). The same journey by public transport will take roughly 47 minutes.

  • Catching an early flight from San Francisco International Airport to San Juan? Avoid the last-minute rush to the airport (and sneak in some extra precious sleep) by choosing one of these hotels near SFO:

How to find the cheapest flights from San Francisco International Airport (SFO) to San Juan

  • The best price we've found for a one-way ticket from San Francisco International Airport to San Juan is R 3,059. The cheapest price for a return flight is R 6,394. Remember fares may change due to demand at the time of booking.

  • Don't wait until the last moment. You're more likely to get cheap tickets from SFO to San Juan if you book in advance. Airlines often offer some great early bird discounts.

  • Finding cheap tickets from San Francisco International Airport to San Juan is more likely if you can be flexible with your travel plans. Check out the 'Whole month' search function to show the lowest fares throughout the month and snap up a great deal.

  • Sign into your online account or use the app to set up a Price Alert. You'll get notified right away if there's a better deal on this route. It doesn't take long, and it'll save you time looking for cheap tickets from SFO to San Juan every day.

  • Play around with the filters to find your ideal journey. To see the 'Fastest,' 'Best' or 'Cheapest' flights from San Francisco International Airport to San Juan, use the 'Sort by' function. You can also filter results by arrival and departure times, airline, and journey duration.

Airports in San Juan

Luis Munoz Marin International Airport (SJU)

Fernando Luis Ribas Dominicci Airport (SIG)

  • After your flight from San Francisco International Airport to San Juan has landed, you can make your way to the city centre in around 14 minutes by car. Central San Juan is roughly 8 kilometres from Fernando Luis Ribas Dominicci Airport (SIG).

  • You can expect the journey to take about 58 minutes on public transport.

  • There are some great places where you can make a pit stop near SIG. Settle in and get cosy after your flight from SFO to San Juan at any of these perfectly located options:

Best time to go to San Juan

  • July is the most popular month to hop on a flight from San Francisco International Airport to San Juan while May is the quietest. To work out the ideal time to visit San Juan, consider the pace you like to travel at.

  • Lock in your flight from San Francisco International Airport to San Juan for September to visit the city during its warmest month. Expect temperatures to range from 23ºC to 33ºC.

  • If you like travelling in cooler conditions, search for a cheap flight from SFO to San Juan in February when temperatures average between 20ºC and 28ºC.

More about San Juan

  • When it comes to looking for somewhere to lay your head, you'll find the best stays in San Juan right here. Check out these hotels as soon as you've locked in your flight from San Francisco International Airport to San Juan:

  • All great journeys should include some sightseeing. Castillo San Felipe del Morro, La Garita del morro de san juan bahia and Fortaleza Street are essential stops on your San Juan itinerary.

Complete your San Juan trip with a car rental

  • Finding you a cheap flight from San Francisco International Airport to San Juan isn't the only trick up our sleeve. Check out our car rentals in San Juan and explore on your own terms. We search for deals from trusted car rental companies and put them all in one place. You can instantly compare rates and then book with no fees.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.