Washington→Saint MartinNonstop Flight TimeIAD–SXM

Washington (Washington Dulles International Airport) to Saint Martin (Princess Juliana International Airport).

Direct flights from IAD to SXM have an estimated flight time of about 4h 3m, based on the 1,682-mile great-circle distance. Our current captured departure sample includes 1/day across 1 captured airline, with United Airlines appearing most often in that sample. Captured departure times run from 08:17 to 08:17 local time.

Methodology: airline, aircraft, terminal, and departure-time details come from the rolling scheduled-departures window for IAD to SXM, last seen June 15, 2026. Frequency uses 7 scheduled departures across 7 observed days; flight time is estimated from great-circle distance until this route has enough tracked flights for an observed average. Provider coverage can miss operators on some routes, so confirm live timetables before booking.