DL977 San FranciscoSFO · 12:25 BostonBOS · 21:07
DL977 by Delta Air Lines flies from San Francisco (SFO) to Boston (BOS) for the Sun, Sep 6 departure.
departs SFO · 139 min late
board checked 1m ago · checking again in 45s
The route today
live boardsWeather lens
Delay & cancellation outlook for this flight
Measured, 90-day sampleConditions at SFO 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 San Francisco to Boston flights today
same route · Delta Air LinesIf DL977 is cancelled, these are the other Delta Air Lines nonstop flights from San Francisco to Boston on the same day, with scheduled departure times in SFO local time. Most flights posting a delay still operate — rebooking usually only beats a very large posted delay. Every airline on this route →
How DL977 actually runs
Pro Flight Search has tracked every published board update for DL977 across the SFO and BOS boards: schedule changes, gate pushes and actual clocks. Early read — pattern not clear yet. Only 2 completed legs so far: departed +35 min. Not enough to call it.
The verdict above is that record speaking, so it reflects how DL977 operates rather than what the timetable promises. Numbers refresh as new flights operate.
How this operation is measured
Board log
scheduled → actual, per operationBoard clocks recorded as SFO and BOS published them.
Planning around DL977? Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure
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Pro Flight Search — DL977 San Francisco to Boston on-time performance, measured from the SFO and BOS airport boards.
https://proflightsearch.com/flight/DL977
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