DL5851 BostonBOS · 19:44 BaltimoreBWI · 21:13
DL5851 by Delta Air Lines flies from Boston (BOS) to Baltimore (BWI).
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 −25 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 BWI 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
ForecastMon 9 Nov, local date
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 Baltimore
ForecastMon 9 Nov, local date
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 Baltimore flights today
same route · Delta Air LinesIf DL5851 is cancelled, these are the other Delta Air Lines nonstop flights from Boston to Baltimore 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 DL5851 actually runs
Pro Flight Search has tracked every published board update for DL5851 across the BOS and BWI boards: schedule changes, gate pushes and actual clocks. Early read: no clear pattern yet. Only 3 completed legs so far: left about 5 min early but landed about 22 min early. Not enough to call it.
The verdict above is that record speaking, so it reflects how DL5851 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: N227JQ, N239JQ, N236JQ.
Board clocks recorded as BOS and BWI published them.
Planning around DL5851? 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: DL5851 Boston to Baltimore on-time performance, measured from the BOS and BWI airport boards.
https://proflightsearch.com/flight/DL5851
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