Santo Domingo is 0-1 hours ahead of New York. During US DST, both are at the same time. During US standard time, Santo Domingo is 1 hour ahead. Dominican Republic doesn't observe DST.
Santo Domingo uses AST (UTC-4) year-round while New York switches between EST/EDT.
Business hours overlap almost completely! The minimal time difference makes US-Dominican coordination very easy. Large diaspora population maintains strong ties.
Santo Domingo and New York are connected by frequent 3.5-hour flights. JetBlue, American, and Delta operate multiple daily services.