 Montrose Regional Airport a public airport as opposed to Luis Muñoz Marín International Airport which is what?
Luis Muñoz Marín International Airport: Luis Muñoz Marín International Airport (IATA: SJU, ICAO: TJSJ, FAA LID: SJU) (Spanish: "Aeropuerto Internacional Luis Muñoz Marín" , Or Isla Verde International Airport/Aeropuerto Internacional de Isla Verde) is a joint civil-military international airport named for Puerto Rico's first democratically elected governor and located in suburban Carolina, Puerto Rico, 3 mi southeast of San Juan.
i don't know