AA4439 BostonBOS · 19:50 BuffaloBUF · 21:35
AA4439 by American Airlines flies from Boston (BOS) to Buffalo (BUF).
scheduled from BOS
Where the minutes go
last 5 operations · gate push → arrivalThe bar is how late it left the gate; the ring is where it actually arrived. Board clocks, not estimates.
The last 30 days
arrival outcome per operationmedian arrival −29 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at BOS and BUF are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. 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 at Boston
ForecastThu 12 Nov, local date
- 96% chance of rain
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · Expected values for tomorrow from a forecast model, kept apart from today's measured figures.
Tomorrow at BUF
ForecastThu 12 Nov, local date
- 89% chance of rain
Forecast: GateWeather · incl. data from ECMWF (CC BY 4.0, modified) · 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 Buffalo flights today
same route · American AirlinesIf AA4439 is cancelled, these are the other American Airlines nonstop flights from Boston to Buffalo 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 AA4439 actually runs
Pro Flight Search has tracked every published board update for AA4439 across the BOS and BUF boards: schedule changes, gate pushes and actual clocks. Usually lands ~24 min early. Based on 5 confirmed landings · 5/5 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 AA4439 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: N411YX, N422YX, N101HQ, N429YX.
Board clocks recorded as BOS and BUF published them.
Planning around AA4439? 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: AA4439 Boston to Buffalo on-time performance, measured from the BOS and BUF airport boards.
https://proflightsearch.com/flight/AA4439
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