How long does it take to get from Maryland Jamaica by plane?

It's not possible to fly directly from Maryland to Jamaica. You would need to fly from an airport in Maryland, probably Washington Dulles International Airport (IAD), to an airport in Jamaica, probably Norman Manley International Airport (KIN) in Kingston or Sangster International Airport (MBJ) in Montego Bay. The total flight time would depend on the specific flight you book, but it would generally be between 5 and 6 hours.