DL977Delta Air Lines · SFO → BOS
live · 4m ago
Route confirmed Delta Air Lines

DL977 San FranciscoSFO · 12:40 BostonBOS · 21:20

DL977 by Delta Air Lines flies from San Francisco (SFO) to Boston (BOS) for the Thu, Nov 5 departure.

Right nowIn the air to Boston · off blocks 12:39 · 1 min early
21:23

estimated arrival at BOS · local time · ~2h 23m from now

LivePosition · updated 4m ago
SFO1,242 mi · ~2h 23m leftBOS
35,000 ftAltitudecruising
570 mphSpeed495 kt
70°Direction

Live position · flown path, last 5h 58m

The route today

live boards
SFOSan FranciscoOn-time likelySFO delay board →
BOSBostonOn-time likelyBOS delay board →
SFO→BOSevery carrier, schedules and on-time historyRoute intelligence →

Weather lens

Delay & cancellation outlook for this flight

Measured, 90-day sample
45%Chance of 15+ min delay
2.4%Chance of cancellation
+10 minTypical airport delay in this weather

Conditions 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. 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 San Francisco

Forecast

Fri 6 Nov, local date

High21°Clikely 20°C to 23°C
Low12°Clikely 11°C to 13°C

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 Boston

Forecast

Fri 6 Nov, local date

High21°Clikely 19°C to 22°C
Low17°Clikely 15°C to 19°C
  • 97% 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 departures
061422
M
T
W
T
F
S
S

Each mark is a scheduled departure at its origin-local time. Today is highlighted.

Other San Francisco to Boston flights today

same route · Delta Air Lines
DL400departs 07:00
DL860departs 15:00
DL1655departs 21:54

If 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 that show a delay still operate. Rebooking usually helps only when that delay is very large. 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: no clear pattern yet. Only 2 completed legs so far: departed -1 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.

Technical record

How this operation is measured

board clocks

Board log

scheduled → actual, per operation
11-05SFO 12:40 12:39 (−1)BOS 21:20 21:23 (+3)
11-04SFO 12:40 12:39 (−1)BOS 21:20 21:19 (−1)

Board 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

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: DL977 San Francisco to Boston on-time performance, measured from the SFO and BOS airport boards.

Canonical URL
https://proflightsearch.com/flight/DL977
How we measure this →