UA3409 BostonBOS · 17:49 WashingtonIAD · 19:53
UA3409 by United Airlines flies from Boston (BOS) to Washington (IAD).
scheduled from BOS
Where the minutes go
last 4 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The route today
live boardsWeather lens
Weather-conditioned outlook for this flight right now
Measured, 90-day sampleDriven mainly by BOS (Boston), currently flying VFR (visual). These figures come from both airports' records under conditions like today's, over the last 90 days.
Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →
Tomorrow on this route
ForecastBoston to Washington with United Airlines · Sat 31 Oct, local date
- Chance a departure is cancelled
- 0.6%0.3× usual
- Chance a departure leaves 60+ min late
- 5.0%0.5× usual
Forecast: WeatherTomorrow · incl. data from ECMWF (CC BY 4.0, modified) · About 5 departures a day on this route with this airline. · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Boston to Washington flights today
same route · United AirlinesIf UA3409 is cancelled, these are the other United Airlines nonstop flights from Boston to Washington on the same day, with scheduled departure times in BOS local time. Most flights that show a delay still operate. Rebooking usually helps only when that delay is very large. Every airline on this route →
How UA3409 actually runs
Pro Flight Search has tracked every published board update for UA3409 across the BOS and IAD boards: schedule changes, gate pushes and actual clocks. Usually lands ~20 min early. Based on 3 confirmed landings · 3/3 within 15 min of schedule. Pushes back late but makes up time in the air.
The verdict above is that record speaking, so it reflects how UA3409 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationAircraft
Recent tails: N723YX, N770YX.
Board clocks recorded as BOS and IAD published them.
Planning around UA3409? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.
Pro Flight Search: UA3409 Boston to Washington on-time performance, measured from the BOS and IAD airport boards.
https://proflightsearch.com/flight/UA3409
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