Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Amarillo to San Juan as you normally would.
Amarillo (AMA), located 6.9 mi from the city center, is the airport you fly out of when you book flights from Amarillo to San Juan. 2 airlines have flights from Amarillo to San Juan on a regular basis. Booking flights from Amarillo to San Juan should not be difficult; the airport handles an average of 0 outbound flights to San Juan per day.
AMA and SJU are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. AMA to SJU refers to a flight route from Amarillo Airport to San Juan Luis Munoz Marin Intl Airport. San Juan Isla Grande Airport (SIG), Ponce Mercedita Airport (PSE), Vieques Airport (VQS), Culebra Airport (CPX), Ceiba J. Aponte de la Torre Airport (NRR) are other airports near this flight route and their unique identifiers/IATA codes.