DL977Delta Air Lines · SFO → BOS
live · 3m 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 Mon, Oct 19 departure.

Right nowIn the air to Boston · off blocks 12:38 · 2 min early
22:06

estimated arrival at BOS · local time · ~5h 55m from now

LivePosition · updated 3m ago
SFO2,661 mi · ~5h 55m leftBOS
13,700 ftAltitudeclimbing
456 mphSpeed396 kt
36°Direction

Live position · flown path, last 5h 58m

Typical gate push+5 minmedian posted departure
Typical arrival+10 minmedian over 2 operations

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

Early read, sample still building
52%Chance of 15+ min delay
3.0%Chance of cancellation
+9 minAvg hub delay right now

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. For this route and airline, under conditions like today's, over the last 90 days. This route's tracked sample is still thin — treat these as an early read, not a precise forecast.

Pro Flight Search tracking, 90 days · the weather × delay correlation study → · live weather risk by airport →

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 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 1 completed leg so far: landed +0 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
10-19SFO 12:40 12:38 (−2)BOS 21:20 21:30 (+10)
10-18SFO 12:40 12:45 (+5)BOS 21:20 (+0)

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 →