According to the DMO Discover Puerto Rico, our island...
"has 200 daily flights and more than 80 daily nonstop flights to major cities throughout the United States. Nonstop flights are available to Atlanta, Baltimore, Boston, Charlotte, Chicago (ORD), Cincinnati, Dallas, Detroit, Fort Lauderdale, Hartford, Houston, Jacksonville, Miami, Minneapolis, New York (JFK), Newark, Orlando, Philadelphia, Pittsburgh Raleigh-Durham, Tampa, Washington D.C., and West Palm Beach. Airlines that fly between Puerto Rico and the USA are Allegiant, American Airlines, Delta, Frontier, JetBlue, Southwest, Spirit and United".
Flying into Puerto Rico has never been so affordable. The following examples illustrate the price of a round trip (RT) airfare ticket from several destinations in the United States. We provided the following input to the KAYAK application using a smartphone.
Input: (Surveyed November 7, 2019)Dates: Thursday, February 13 to Thursday, February 20, 2020. Number of Traveler's: One (1) Class: Economy, Round Trip Option ($Cheapest - $Quickest)
Passport:Passports are not required for US Citizens traveling from the United States but a valid government issued ID will be required to board the plane as you clear TSA like in any other airport. Passports are required if you are flying from outside the United States. If this is your case, you may want to contact your local travel agent and/or American Embassy for details on the requirements to enter Puerto Rico. You can also search for the official entry requirements from the United States State Department. The following airlines currently provide service to Puerto Rico: (updated November 7, 2019)
Frontier Airlines 1-801-401-9000
JetBlue Airways 1-800-538-2583
Vieques Air Link 1-888-901-9247
Tradewind Aviation 1-800-376-7922