United AirlinesUA
Flights UA346 08:17 Fr
live
Direct flights from Washington (IAD) to Sint Maarten (SXM): 1 nonstop departure observed each week across 1 airline. The nonstop covers 2,706 km, an estimated 3 hours 58 minutes in the air. Measured by Pro Flight Search from live flight boards at Washington and Sint Maarten. Updated 14 September 2026 at 21:22 UTC.
IAD
Washington
busy · +25
SXM
Sint Maarten
tracking
2,706 km · ~3h 58m est.
Under pressure · 1 airline · 1x weekly · nonstop
66 / 100
route health from live IAD and SXM delay boards
Flight time~3h 58mestimated from route distance
Weekly departures1x1 direct airline on the leg
The week
scheduled departures · origin local time06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
United Airlines
Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.
Who flies it
observed on the boards · 7 daysAirports right now
live boardsnext sweep in 120s
How the Washington to Sint Maarten route actually runs
Pro Flight Search records official board updates for nonstop IAD to SXM flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.
Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Cite this data
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Suggested citation
Pro Flight Search — Washington (IAD) to Sint Maarten (SXM) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/IAD-SXM
IAD to SXM questions
Is IAD–SXM running on time right now?
Some delays possible. The departure side at IAD is the weaker end, route health score 66/100. The airports section above carries the live status and delay window at both ends.
How long is the flight from IAD to SXM?
Great-circle distance is 2,706 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 221–262 min gate-to-gate on this route.
How often does IAD–SXM fly?
United Airlines runs the route with about 1 flight a week (fri). Since one carrier owns the route, a single disruption tends to ripple through the day.
What does the route health score measure?
A blend of departure-side delay at IAD and arrival-side delay at SXM, computed from rolling delay windows (refreshed every 40 minutes) with a daily-rollup fallback. Current MVFR, IFR, or LIFR endpoint weather caps the score when flight rules can limit throughput. Higher is healthier: 100 means operations are clean at both ends.
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