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 August.

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 3,250
Cheapest month to flyAugust

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 6,401. 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 6,401.
As of July 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 September.
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 6,401.
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 Sunday, 28 September 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 July, the average temperature is usually around 27°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

  • San Juan is three hours ahead of San Francisco, where San Francisco International Airport is located. San Juan follows the UTC-4 timezone.

  • Leave enough time to catch your SFO to San Juan flight. As a rule of thumb, arrive at least two hours before international departures and an hour ahead for domestic flights.

  • Longer lines at security and check-in are more likely if you're jetting off during high season, so give yourself a bit more breathing room. A good rule for peak times? Get there up to four hours ahead for international flights and two hours for domestic departures.

  • We make it simple to book flight tickets from SFO to San Juan with a stopover. To see your options, uncheck 'Direct flights only.' Next, choose a flight offering a stop long enough to see the sights of your chosen city. The most sought-after stopovers include:

    • Denver International Airport (DEN)

    • Miami International Airport (MIA)

    • Fort Lauderdale-Hollywood International Airport (FLL)

  • The journey from central San Francisco to SFO takes about 45 minutes by public transport. If you drive, ride-share or grab a cab, you'll cover the 18 kilometres in 20 minutes or so, depending on traffic.

  • In search of a hotel close to SFO? If you're catching an early flight from San Francisco International Airport to San Juan, these accommodation options put the terminal practically at your doorstep:

  • 77.36% of flights leaving from San Francisco International Airport touch down at their destination on time.

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

  • The best price we've seen for a one-way San Francisco International Airport to San Juan flight is R 3,250. The cheapest price for a return flight is R 6,401. Remember fares can change due to availability at the time of booking.

  • To find cheap flights from SFO to San Juan, book early. Airlines tend to offer their most competitively priced fares when tickets are first released.

  • If you have flexibility with your trip dates, make the most of the 'Whole month' search tool. It'll show you the lowest price across every month when looking for your San Francisco International Airport to San Juan ticket.

  • There's no need to check in daily to see if fares have dropped when you set up a Price Alert. We'll notify you the moment there's an even bigger deal on cheap flights from SFO to San Juan.

  • Find a cheap flight from San Francisco International Airport to San Juan with the help of our filters. Choose your ideal departure time, duration and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in San Juan

Luis Munoz Marin International Airport (SJU)

  • The distance from Luis Munoz Marin International Airport (SJU) to central San Juan is roughly 8 kilometres. It'll take you around 10 minutes to reach the centre driving.

  • It'll take around 55 minutes when travelling by public transport.

  • The last thing you need is a long journey to your hotel if you're getting in late on a flight from San Francisco International Airport to San Juan. Reserve one of these accommodation options near SJU instead:

  • Travel at your own pace with a Luis Munoz Marin International Airport rental car. Pick up your wheels from Sixt, Ace Rent a Car or U-Save and venture far and wide through San Juan and beyond.

  • Lock in the best possible rate by reserving your ride from Luis Munoz Marin International Airport about two weeks in advance of your flight from SFO to San Juan.

Fernando Luis Ribas Dominicci Airport (SIG)

  • After your flight from San Francisco International Airport to San Juan has hit the runway, you can make your way to the city centre in about 15 minutes by car. Central San Juan is roughly 8 kilometres from Fernando Luis Ribas Dominicci Airport (SIG).

  • If you choose to travel on public transport, you'll reach the centre in 1 hour or so.

  • After stepping off your SFO to San Juan flight, tuck yourself in at a hotel close to SIG. These are some comfortable accommodation options that'll help you switch to relaxation mode:

Best time to go to San Juan

  • Plan your trip to San Juan during the high season if you want a busy atmosphere, but remember that prices may be higher. Alternatively, book your flights from San Francisco International Airport to San Juan in the low season when prices are cheaper and it's quieter.

  • The warmest month in San Juan is September, with temperatures ranging between 23ºC (73ºF) and 33ºC (91ºF). Lock in your San Francisco International Airport to San Juan flight ticket then if you enjoy this type of weather.

  • February has average temperatures of between 20ºC (68ºF) and 28ºC (82ºF). Look for a cheap ticket from SFO to San Juan around that time if you want to travel in cooler conditions.

More about San Juan

  • Once you've booked your flight from San Francisco International Airport to San Juan, find a hotel that keeps you close to what you want to see. Make one of these options your base for exploring San Juan:

  • La Garita del morro de san juan bahia and Castillo San Felipe del Morro are just two of the top attractions to add to your San Juan travel itinerary. Keep the adventure rolling by checking out Fortaleza Street.

Explore more of Puerto Rico

  • San Juan has plenty going for it, but there are so many other corners of Puerto Rico waiting to be explored. Around 113 kilometres west of San Juan, a visit to Aguadilla will keep you busy. Start with leading attractions like El Parterre, Aguadilla Ice Skating Arena and Bandera de los Reyes Magos.

  • Isabela is another must-experience destination in Puerto Rico and is around 105 kilometres west of San Juan. No journey is complete without seeing Amarillo Mango, Urb. Llanos Piscina Park and Noches de Artesania.

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