Cheap Flights from Baltimore to San Juan Starting at $138

Luis Muñoz Marín International Airport (SJU) is Puerto Rico’s primary international gateway and typically serves as the island’s main hub for both full-service carriers and many leisure airlines. Expect a mix of U.S. domestic flights and regional connections from major carriers, plus budget and charter options during high season. The airport sits roughly 8 miles (13 km) southeast of Old San Juan; travel times to downtown are usually 15–30 minutes by taxi or rideshare, with fares commonly in a moderate range, or around 30–60 minutes by public bus for a lower cost. Rental cars, taxis, shuttles and occasional ferries are available. Pros: multiple carrier choices and good international connectivity. Cons: can be busy during holidays and security/immigration lines may add time.

Baltimore/Washington International Thurgood Marshall Airport (BWI) serves as the region’s budget- and leisure-friendly gateway, often hosting low-cost carriers alongside legacy airlines. It typically offers more affordable fares compared with nearby Washington-area airports, making it popular for price-conscious travelers. BWI is about 9–10 miles south of downtown Baltimore; travel options include light rail or Amtrak connections (roughly 20–30 minutes), airport shuttle or taxi (20–30 minutes, fares varying), and rideshares that can be quicker depending on traffic. Pros: generally easier parking, fewer crowds, and competitive ticket prices. Cons: can be less convenient for transfers to D.C. or downtown during peak traffic and some international connectivity is limited.

Fly direct from Baltimore to San Juan for the quickest, most convenient way to reach Puerto Rico’s beaches and vibrant Old San Juan — no layovers, just more time to relax. While connecting flights can sometimes be cheaper, a nonstop route saves hours and reduces stress, making it a great choice if you value comfort and speed when booking.

The route Baltimore — San Juan is served by many carriers — 4 in total, including Southwest Airlines, Frontier Airlines, Spirit Airlines, and American Airlines. This gives passengers wide opportunities: from finding the lowest fare (from $138) to selecting flights by schedule or service class. Our service aggregates data from multiple booking systems so you can compare offers in one place. This saves time and money: no need to check dozens of sites — just pick the right option and book online.

We carefully collect statistics on the search and pricing of airlines and, based on these data, we make an assumption about future prices. Thus, you can better understand which season is the cheapest to fly from Baltimore to San Juan