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Delta Air Lines

Is DL400 delayed?

No delay reported yet. DL400 is scheduled to leave San Francisco at 07:14 on Nov 14 and reach Boston at 15:37 (as of Nov 14, 14:26 UTC).

Usually on time: arrived within 15 min of schedule on 23 of the last 28 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

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.

  • San Francisco → Boston

    On schedule (8 min behind)

  • San Francisco → Boston

    19 min late

  • San Francisco → Boston

    2 min early

  • San Francisco → Boston

    39 min early

  • San Francisco → Boston

    23 min late

Is DL400 usually late?

Period: Oct 15, 2026 – Nov 14, 2026

Arrivals tracked
28
On time
82%
of 28 arrivals
Late
18%
of 28 arrivals
Cancelled
0%
of 29 flights
Median arrival delay
4 min early
9 in 10 arrived within
20 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 32
Cancelled today
38
Flights from San Francisco to Boston today

Boston (BOS) departures

Left more than 15 min late
14 of 31
Cancelled today
50

Related flights

All Delta Air Lines flights

Flight history and details
DL400 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Nov 13, 2026ArrivedSan FranciscoBoston8
Nov 12, 2026ArrivedSan FranciscoBoston19
Nov 11, 2026ArrivedSan FranciscoBoston-2
Nov 10, 2026ArrivedSan FranciscoBoston-39
Nov 9, 2026ArrivedSan FranciscoBoston23
Nov 8, 2026ArrivedSan FranciscoBoston-4
Nov 7, 2026ArrivedSan FranciscoBoston13
Nov 5, 2026ArrivedSan FranciscoBoston-20
Nov 4, 2026ArrivedSan FranciscoBoston-18
Nov 3, 2026ArrivedSan FranciscoBoston-18
Nov 2, 2026ArrivedSan FranciscoBoston-22
Nov 1, 2026ArrivedSan FranciscoBoston-25
Oct 31, 2026ArrivedSan FranciscoBoston-23
Oct 30, 2026ArrivedSan FranciscoBoston-30
Oct 29, 2026ArrivedSan FranciscoBoston-8
Oct 28, 2026ArrivedSan FranciscoBoston-11
Oct 27, 2026ArrivedSan FranciscoBoston-15
Oct 26, 2026ArrivedSan FranciscoBoston-5
Oct 25, 2026ArrivedSan FranciscoBoston6
Oct 24, 2026ArrivedSan FranciscoBoston11
Oct 23, 2026ArrivedSan FranciscoBoston2
Oct 22, 2026ArrivedSan FranciscoBoston-1
Oct 21, 2026ArrivedSan FranciscoBoston16
Oct 20, 2026ArrivedSan FranciscoBoston-4
Oct 19, 2026ArrivedSan FranciscoBoston-19
Oct 18, 2026ArrivedSan FranciscoBoston5
Oct 17, 2026ArrivedSan FranciscoBoston48
Oct 16, 2026ArrivedSan FranciscoBoston27
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