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Delta Air Lines

Is DL3991 delayed?

Yes — DL3991 landed in Seattle 31 min late, at 23:10 on Sep 27 (as of Sep 28, 06:10 UTC). Over its last 42 recorded arrivals, 18 landed more than 15 min late.

Each route and date is shown separately. Confirm that both airports match your booking.

Arrived

31 min late

Official source · Updated

Departure

San Francisco

SFO

Actual

Scheduled 21:07

Sep 27

Arrival

Seattle

SEA

Actual

Scheduled 22:39

Sep 27

Times shown in airport local time

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

Flight details

Departure · UTC

Scheduled
Estimated
Not available
Actual

Arrival · UTC

Scheduled
Estimated
Not available
Actual
Arrived

18 min late

Official source · Updated

Departure

Seattle

SEA

Scheduled

Not available

Arrival

San Francisco

SFO

Actual

Scheduled 20:18

Sep 27

Times shown in airport local time

Service date: · Scheduled arrival date; departure time unavailable (America/Los_Angeles)

Flight details

Departure · UTC

Scheduled
Not available
Estimated
Not available
Actual
Not available

Arrival · UTC

Scheduled
Estimated
Actual
Route overview: San Francisco → SeattleSFOSEA
San Francisco → Seattle
Route overview: Seattle → San FranciscoSEASFO
Seattle → San Francisco

Recent arrivals

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

  • San Francisco → Seattle

    31 min late

  • Seattle → San Francisco

    18 min late

  • San Francisco → Seattle

    10 min early

  • Seattle → San Francisco

    14 min early

  • San Francisco → Seattle

    20 min late
Flight history and details

Aug 29, 2026 — Sep 28, 2026

Observed arrivals
42
Arrivals over 15 minutes late
18
Observed cancellations
0
Observed occurrences
46

Results compare scheduled and actual arrival times. Cancelled or diverted flights are excluded. Some flights may be missing from the history.

How flight status works

DL3991 Recent arrival history
Service dateDepartureArrivalActualArrival delay (minutes)
Sep 27, 2026ArrivedSan FranciscoSeattle31
Sep 27, 2026ArrivedSeattleSan Francisco18
Sep 26, 2026ArrivedSan FranciscoSeattle-10
Sep 26, 2026ArrivedSeattleSan Francisco-14
Sep 25, 2026ArrivedSan FranciscoSeattle20
Sep 25, 2026ArrivedSeattleSan Francisco1
Sep 24, 2026ArrivedSan FranciscoSeattle-16
Sep 24, 2026ArrivedSeattleSan Francisco-3
Sep 23, 2026ArrivedSan FranciscoSeattle-21
Sep 23, 2026ArrivedSeattleSan Francisco-11
Sep 22, 2026ArrivedSan FranciscoSeattle13
Sep 22, 2026ArrivedSeattleSan Francisco-18
Sep 21, 2026ArrivedSan FranciscoSeattle30
Sep 21, 2026ArrivedSeattleSan Francisco26
Sep 20, 2026ArrivedSan FranciscoSeattle-6
Sep 20, 2026ArrivedSeattleSan Francisco6
Sep 19, 2026ArrivedSan FranciscoSeattle-18
Sep 19, 2026ArrivedSeattleSan Francisco-10
Sep 18, 2026ArrivedSan FranciscoSeattle91
Sep 18, 2026ArrivedSeattleSan Francisco90
Sep 17, 2026ArrivedSan FranciscoSeattle35
Sep 17, 2026ArrivedSeattleSan Francisco53
Sep 16, 2026ArrivedSan FranciscoSeattle104
Sep 16, 2026ArrivedSeattleSan Francisco120
Sep 15, 2026ArrivedSan FranciscoSeattle78
Sep 15, 2026ArrivedSeattleSan Francisco-5
Sep 14, 2026ArrivedSan FranciscoSeattle-15
Sep 14, 2026ArrivedSeattleSan Francisco-21
Sep 13, 2026ArrivedSan FranciscoSeattle14
Sep 13, 2026ArrivedSeattleSan Francisco-3
Sep 7, 2026ArrivedSan FranciscoSeattle4
Sep 7, 2026ArrivedSeattleSan Francisco15
Sep 4, 2026ArrivedSan FranciscoSeattle58
Sep 4, 2026ArrivedSeattleSan Francisco54
Sep 3, 2026ArrivedSan FranciscoSeattle2
Sep 3, 2026ArrivedSeattleSan Francisco23
Sep 2, 2026ArrivedSan FranciscoSeattle-17
Sep 2, 2026ArrivedSeattleSan Francisco-16
Sep 1, 2026ArrivedSeattleSan Francisco-12
Aug 31, 2026ArrivedSeattleSan Francisco47
Aug 30, 2026ArrivedSeattleSan Francisco17
Aug 29, 2026ArrivedSeattleSan Francisco-24

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