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Delta Air Lines

Is DL977 delayed?

No delay reported yet. DL977 is scheduled to leave San Francisco at 13:25 on Nov 14 and reach Boston at 21:26 (as of Nov 14, 15:31 UTC).

Usually on time: arrived within 15 min of schedule on 29 of the last 39 flights.

No live update yet

Showing the published schedule until live times come in.

Update time unavailable

Departure

San Francisco

SFO

Scheduled

Nov 14

Arrival

Boston

BOS

Scheduled

Nov 14

Times shown in airport local time

Service date: · Scheduled departure date (America/Los_Angeles)

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual
Not available

Arrival · UTC

Scheduled
Estimated
Not available
Actual
Not available

Also sold as LY4578, KE3255, WS7983

Route overview: San Francisco → BostonSFOBOS
San Francisco → Boston

Recent arrivals

Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.

  • Boston → San Francisco

    On schedule (10 min behind)

  • San Francisco → Boston

    47 min late

  • Boston → San Francisco

    5 min early

  • San Francisco → Boston

    On schedule (6 min behind)

  • Boston → San Francisco

    On schedule (1 min behind)

Is DL977 usually late?

Period: Oct 15, 2026 – Nov 14, 2026

Arrivals tracked
39
On time
74%
of 39 arrivals
Late
26%
of 39 arrivals
Cancelled
2%
of 50 flights
Median arrival delay
0 min
9 in 10 arrived within
43 min

On time means arriving no more than 15 minutes after the scheduled time; late means more than 15 minutes after. Cancelled and diverted flights are counted apart from arrivals. Compares scheduled and actual arrival times. Cancelled and diverted flights are left out. Some flights may be missing.

How flight status works

At the airports today

San Francisco (SFO) departures

Left more than 15 min late
25 of 43
Cancelled today
41
Flights from San Francisco to Boston today

Boston (BOS) departures

Left more than 15 min late
23 of 48
Cancelled today
52

Related flights

All Delta Air Lines flights

Flight history and details
DL977 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Nov 13, 2026CancelledSan FranciscoBostonNot availableNot available
Nov 13, 2026ArrivedBostonSan Francisco10
Nov 12, 2026ArrivedSan FranciscoBoston47
Nov 12, 2026ArrivedBostonSan Francisco-5
Nov 11, 2026ArrivedSan FranciscoBoston6
Nov 11, 2026ArrivedBostonSan Francisco1
Nov 10, 2026ArrivedSan FranciscoBoston-23
Nov 10, 2026ArrivedBostonSan Francisco21
Nov 9, 2026ArrivedSan FranciscoBoston-42
Nov 9, 2026ArrivedBostonSan Francisco9
Nov 8, 2026ArrivedSan FranciscoBoston-27
Nov 8, 2026ArrivedBostonSan Francisco-4
Nov 7, 2026ArrivedSan FranciscoBoston104
Nov 7, 2026ArrivedBostonSan Francisco-12
Nov 6, 2026ArrivedSan FranciscoBoston70
Nov 6, 2026ArrivedBostonSan Francisco-20
Nov 5, 2026ArrivedSan FranciscoBoston-4
Nov 5, 2026ArrivedBostonSan Francisco4
Nov 4, 2026ArrivedSan FranciscoBoston-14
Nov 4, 2026ArrivedBostonSan Francisco-14
Nov 3, 2026ArrivedSan FranciscoBoston-11
Nov 2, 2026ArrivedSan FranciscoBoston11
Nov 1, 2026ArrivedSan FranciscoBoston-2
Oct 31, 2026ArrivedSan FranciscoBoston0
Oct 30, 2026ArrivedSan FranciscoBoston-15
Oct 29, 2026ArrivedSan FranciscoBoston-33
Oct 28, 2026ArrivedSan FranciscoBoston-9
Oct 27, 2026ArrivedSan FranciscoBoston-1
Oct 26, 2026ArrivedSan FranciscoBoston-22
Oct 25, 2026ArrivedSan FranciscoBoston-7
Oct 24, 2026ArrivedSan FranciscoBoston-7
Oct 23, 2026ArrivedSan FranciscoBoston21
Oct 22, 2026ArrivedSan FranciscoBoston24
Oct 21, 2026ArrivedSan FranciscoBoston16
Oct 20, 2026ArrivedSan FranciscoBoston12
Oct 19, 2026ArrivedSan FranciscoBoston12
Oct 18, 2026ArrivedSan FranciscoBoston4
Oct 17, 2026ArrivedSan FranciscoBoston24
Oct 16, 2026ArrivedSan FranciscoBoston72
Oct 15, 2026ArrivedSan FranciscoBoston42
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