There are 3 international airports in Puerto Rico, in the cities of Mayaguez, Ponce, and San Juan, but the widest variety of options and generally the best prices on flights are in San Juan, and the Luis Munoz Marin International Airport.
Pro Tip: If you can’t get your car until morning, be aware that airport taxi service in San Juan is government regulated, with a fixed flat rate price to various areas of the city, including Carolina, Isla Verde, Condado, Miramar, and Old San Juan.
Interesting sights along the way include the Kiosks sections between the towns of Finca Pinones and La Torre, built by the government to give locals a chance to build a business; La Posita, a family beach sheltered by a rock wall that cuts off the surf and undertow; the Pinones Boardwalk, becoming a popular tourist attraction for amazing native street food; and sharp eyes might notice La Playa Del Pueblo, a wooded section of beach taken over by locals against the commercialization, just before the Marriott Courtyard at Inn.
Today, its significance is recognized, being a cornerstone of the San Juan National Historic site, managed by the US National Park Service, and the UNESCO Old San Juan World Heritage Site.