DL821 AtlantaATL · 18:45 BostonBOS · 21:30
DL821 by Delta Air Lines flies from Atlanta (ATL) to Boston (BOS) for the Mon, Sep 7 departure.
arrived at BOS · 24 min late
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 +40 min · 0 cancelled · 5 operations tracked
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at ATL and BOS are near their clear-air norm right now, so this reflects the route's recent baseline rather than a weather penalty. For this route and airline, 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 →
When it flies
scheduled departuresEach mark is a scheduled departure at its origin-local time. Today is highlighted.
Other Atlanta to Boston flights today
same route · Delta Air LinesIf DL821 is cancelled, these are the other Delta Air Lines nonstop flights from Atlanta to Boston on the same day, with scheduled departure times in ATL local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How DL821 actually runs
Pro Flight Search has tracked every published board update for DL821 across the ATL and BOS boards: schedule changes, gate pushes and actual clocks. Usually lands ~216 min late. Based on 1 confirmed landing · 0/1 within 15 min of schedule.
The verdict above is that record speaking, so it reflects how DL821 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: N306DN, N123DW, N307DX, N358DN.
Board clocks recorded as ATL and BOS published them.
Planning around DL821? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL821 Atlanta to Boston on-time performance, measured from the ATL and BOS airport boards.
https://proflightsearch.com/flight/DL821
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