✈️ Flight Guide: Boston (BOS) → San Juan (SJU)

The busiest travel days in December are typically the Fridays before the holiday week and the weekends around the Christmas and New Year holidays. Airlines often add extra seasonal flights, but expect higher prices and fuller cabins on peak dates; book as early as possible and check alternate midweek departures for lower fares.

A nonstop flight from Boston Logan International Airport (BOS) to Luis Muñoz Marín International Airport (SJU) generally takes about 4 hours and 30 minutes to 5 hours depending on winds and routing. Check airlines' published flight times when booking and allow additional time for boarding and taxiing during the busy December holiday period.

In December, allow extra time for holiday traffic and increased ride-share demand. Public transport options include the MBTA Blue Line + free shuttle to terminals, Logan Express buses from major suburbs, and commuter rail to nearby stations. If driving, reserve garage parking early or use off-site shuttles to avoid last-minute delays.

As of December travel patterns, no special international COVID entry requirements are typically enforced between the U.S. mainland and Puerto Rico, since Puerto Rico is a U.S. territory. However, always verify current CDC and airline advisories before departure, and review carrier-specific mask or testing policies that may change seasonally.

To find budget-friendly BOS to SJU December fares, search flexible dates, set fare alerts, and compare major carriers and low-cost options. Midweek departures, red-eyes, and booking 6–10 weeks in advance often yield savings; use price-tracking tools and consider nearby departure windows to secure the best deals.

During December, expect fuller flights and longer security lines; check your airline's carry-on and checked baggage rules before arriving. Use online check-in and self-service kiosks to save time, tag luggage correctly, and arrive at least 2 hours before domestic or Puerto Rico departures to accommodate holiday crowds.

December in San Juan is warm and generally dry compared to the summer wet season, with average daytime temperatures in the high 70s to low 80s Fahrenheit. Travelers arriving from cold Boston should plan light clothing and sunscreen; occasional passing showers are possible, so pack a light rain layer if planning island-hopping.

Ground transport options include authorized taxis, ride-share services, rental cars, and shared shuttles. Travel time to Old San Juan is typically 15–25 minutes depending on traffic; Isla Verde is adjacent to the airport and often a short 5–10 minute drive. During December holiday periods, allow extra time for traffic and book airport shuttles or car rentals in advance.

Yes, December brings festive markets, parades, and holiday lights throughout San Juan and nearby towns. Expect cultural events in Old San Juan, seasonal concerts, and larger crowds on weekends; book tours and popular restaurants in advance to avoid sold-out experiences.

Traveling from Boston to Puerto Rico is treated as a domestic flight, so you will claim baggage at SJU without international customs formalities. However, standard TSA carry-on rules apply at departure, and local agricultural rules restrict certain foods—check SJU and Puerto Rico tourism guidance to avoid fines.

Plan at least a full day to transition from arrival to activities: pick up a rental car or shuttle, check into your hotel, and allow time to acclimate. For same-day tours or island excursions, book in advance and schedule morning arrivals whenever possible to maximize daylight and avoid last-minute availability issues.