IAD → ACKWashington to Nantucket

live

Direct flights from Washington (IAD) to Nantucket (ACK): 1 nonstop departure observed each week across 1 airline. 67% of the last 6 operated flights arrived within 15 minutes of schedule. The median arrival is 11 minutes late. No cancellations were recorded across the 6 tracked flights. The nonstop covers 679 km, an estimated 1 hour 22 minutes in the air. Measured by Pro Flight Search from live flight boards at Washington and Nantucket. Updated 10 September 2026 at 02:18 UTC.

IAD Washington busy · +22
ACK Nantucket tracking
679 km · ~1h 22m est.
departs 16:301x weekly
Runs mixed · 1 airline · 1x weekly · nonstop
67% on time

of the last 6 operated IAD → ACK flights arrived within 15 minutes

Median arrival delay is +11 min. 0 of 6 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival+11 minacross the last 6 operated legs
Flight time~1h 22mestimated from route distance
Weekly departures1x1 direct airline on the leg

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Tradewind Aviation

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 days
Tradewind AviationTJ

Flights TJ434 16:30 Mo

History

operated legs · board outcomes
09-091I433departed+11
09-09JXA491departed+0
09-081I373departed+5
09-07TJ434departed+31
09-07VJA692departed+0
09-061I688departed+16

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
IADWashington +22 min busy 🌤 clear · S 9 kt Full IAD delay board →
ACKNantucket tracking Full ACK delay board →

How the Washington to Nantucket route actually runs

Pro Flight Search records official board updates for nonstop IAD to ACK 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 Nantucket (ACK) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/IAD-ACK
How we measure this →

IAD to ACK questions

Is IAD–ACK running on time right now?

Mostly on schedule. The departure side at IAD is the weaker end, route health score 70/100. The airports section above carries the live status and delay window at both ends.

How long is the flight from IAD to ACK?

Great-circle distance is 679 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 78–88 min gate-to-gate on this route.

How often does IAD–ACK fly?

Tradewind Aviation runs the route with about 1 flight a week (mon). 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 ACK, 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.