United AirlinesUA60% on time
Flights UA641 08:35 daily · UA1392 13:05 daily · UA688 17:28 daily · UA755 22:15 daily
live
Direct flights from Washington (IAD) to Boston (BOS): 7 nonstop departures observed each week across 1 airline. 71% of the last 7 operated flights arrived within 15 minutes of schedule. The median arrival is 7 minutes late. No cancellations were recorded across the 7 tracked flights. The nonstop covers 664 km, an estimated 1 hour 21 minutes in the air. Measured by Pro Flight Search from live flight boards at Washington and Boston. Updated 11 September 2026 at 01:25 UTC.
IAD
Washington
busy · +19
BOS
Boston
busy · +22
664 km · ~1h 21m est.
Runs mixed · 1 airline · 7x weekly · nonstop
71% on time
of the last 7 operated IAD → BOS flights arrived within 15 minutes
Median arrival delay is +7 min. 0 of 7 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →
Median arrival+7 minacross the last 7 operated legs
Flight time~1h 21mestimated from route distance
Weekly departures7x1 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 daysHistory
operated legs · board outcomes09-10JRE841departed+0
09-10PLF106departed+7
09-09UA3750arrived+30
Actual board outcomes rather than schedules, paired departure and arrival per flight and day.
Full board history, day by day →
Airports right now
live boardsWeather lens
Current conditions put the pressure at BOS: 40% odds of a 15+ minute delay and around +8 min expected when it bites, measured from this route's own weather-matched delay history. See live delays → · Weather risk by airport →
next sweep in 120s
How the Washington to Boston route actually runs
Pro Flight Search records official board updates for nonstop IAD to BOS 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 Boston (BOS) route reliability, measured from operated flights on official airport boards.
Canonical URL
How we measure this →
https://proflightsearch.com/search-flights/IAD-BOS
IAD to BOS questions
Is IAD–BOS running on time right now?
Mostly on schedule. The arrival side at BOS is the weaker end, route health score 72/100. The airports section above carries the live status and delay window at both ends.
Morning or evening flight on IAD–BOS?
Operators schedule morning departures around 08:35 and evening departures around 17:28 from IAD. Earlier flights typically land before destination-airport delays accumulate later in the day; check the BOS delay card to confirm conditions when you'd arrive.
How long is the flight from IAD to BOS?
Great-circle distance is 664 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 77–87 min gate-to-gate on this route.
How often does IAD–BOS fly?
United Airlines runs the route with about 28 flights a week (daily). Since one carrier owns the route, a single disruption tends to ripple through the day.
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