San Juan Luis Munoz Marin SJU: the complete layover guide

SJU keeps everything in one building. Four lettered concourses hang off a single terminal complex, and once you are through security you can walk between all of them without going back outside.

Terminal A is the newer wing on the western side, built for JetBlue and now also hosting carriers like Air Canada, Avelo and Tradewind Aviation. The central complex holds the check in halls for Concourses B, C and D, which fan out along the airfield. A and B connect landside near the ticketing counters, so even if you exit security you are never walking between separate buildings in the Caribbean heat. Airside, covered walkways link all four concourses, and a healthy walk from the far end of A to the far end of D takes about 10 to 20 minutes.

Connections here are simple by design. Same concourse transfers are a stroll. Cross concourse transfers on a single ticket need no rescreening, just walking. On separate tickets with checked bags you start over from the check in hall, and that is where the SJU quirk bites: bags bound for the US mainland are scanned by USDA agriculture inspection before you reach the airline counter, a screening for fruit, plants and other restricted produce. The line moves, but at peak departure banks around midday it can add 10 to 20 minutes. Carry on only travelers skip it entirely.

The territory question confuses more people than anything else at this airport. Puerto Rico is part of the United States, so a flight from SJU to Miami, Orlando or New York is a domestic flight. No passport control, no customs on arrival, no preclearance facility because none is needed. International arrivals from the Caribbean, Latin America or Europe clear CBP at San Juan and then connect onward as domestic passengers, which makes SJU a genuinely useful gateway between the region and the mainland.

Amenities are honest rather than impressive. Free wifi runs on the SJUFreeWiFi network, but travelers consistently report session limits of about an hour before you reconnect, so do not plan a long video call around it. Food and retail cluster airside in A, B and C, with respectable local options alongside the chains, but almost nothing stays open overnight. After the last departure banks the airside areas wind down fast.

Leaving the airport is where SJU earns its keep as a layover stop. Taxis run on a flat zone tariff: roughly 12 dollars to Isla Verde beach, about 17 dollars to Condado, and around 21 dollars to Old San Juan, plus small surcharges for bags and late night rides. Uber also operates here. Old San Juan is 15 to 25 minutes away in normal traffic, which means a 5 hour layover comfortably buys you two hours of cobblestones, a fort wall and a proper meal. With 4 hours or less, stay closer and pick Isla Verde, which is barely 10 minutes from the curb.