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.
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
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
Recent arrivals
Dates below are arrival dates in the destination airport’s time zone. The detailed history uses service dates.
- 31 min late
San Francisco → Seattle
- 18 min late
Seattle → San Francisco
- 10 min early
San Francisco → Seattle
- 14 min early
Seattle → San Francisco
- 20 min late
San Francisco → Seattle
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.
| Service date | Departure | Arrival | Actual | Arrival delay (minutes) |
|---|---|---|---|---|
| Sep 27, 2026Arrived | San Francisco | Seattle | 31 | |
| Sep 27, 2026Arrived | Seattle | San Francisco | 18 | |
| Sep 26, 2026Arrived | San Francisco | Seattle | -10 | |
| Sep 26, 2026Arrived | Seattle | San Francisco | -14 | |
| Sep 25, 2026Arrived | San Francisco | Seattle | 20 | |
| Sep 25, 2026Arrived | Seattle | San Francisco | 1 | |
| Sep 24, 2026Arrived | San Francisco | Seattle | -16 | |
| Sep 24, 2026Arrived | Seattle | San Francisco | -3 | |
| Sep 23, 2026Arrived | San Francisco | Seattle | -21 | |
| Sep 23, 2026Arrived | Seattle | San Francisco | -11 | |
| Sep 22, 2026Arrived | San Francisco | Seattle | 13 | |
| Sep 22, 2026Arrived | Seattle | San Francisco | -18 | |
| Sep 21, 2026Arrived | San Francisco | Seattle | 30 | |
| Sep 21, 2026Arrived | Seattle | San Francisco | 26 | |
| Sep 20, 2026Arrived | San Francisco | Seattle | -6 | |
| Sep 20, 2026Arrived | Seattle | San Francisco | 6 | |
| Sep 19, 2026Arrived | San Francisco | Seattle | -18 | |
| Sep 19, 2026Arrived | Seattle | San Francisco | -10 | |
| Sep 18, 2026Arrived | San Francisco | Seattle | 91 | |
| Sep 18, 2026Arrived | Seattle | San Francisco | 90 | |
| Sep 17, 2026Arrived | San Francisco | Seattle | 35 | |
| Sep 17, 2026Arrived | Seattle | San Francisco | 53 | |
| Sep 16, 2026Arrived | San Francisco | Seattle | 104 | |
| Sep 16, 2026Arrived | Seattle | San Francisco | 120 | |
| Sep 15, 2026Arrived | San Francisco | Seattle | 78 | |
| Sep 15, 2026Arrived | Seattle | San Francisco | -5 | |
| Sep 14, 2026Arrived | San Francisco | Seattle | -15 | |
| Sep 14, 2026Arrived | Seattle | San Francisco | -21 | |
| Sep 13, 2026Arrived | San Francisco | Seattle | 14 | |
| Sep 13, 2026Arrived | Seattle | San Francisco | -3 | |
| Sep 7, 2026Arrived | San Francisco | Seattle | 4 | |
| Sep 7, 2026Arrived | Seattle | San Francisco | 15 | |
| Sep 4, 2026Arrived | San Francisco | Seattle | 58 | |
| Sep 4, 2026Arrived | Seattle | San Francisco | 54 | |
| Sep 3, 2026Arrived | San Francisco | Seattle | 2 | |
| Sep 3, 2026Arrived | Seattle | San Francisco | 23 | |
| Sep 2, 2026Arrived | San Francisco | Seattle | -17 | |
| Sep 2, 2026Arrived | Seattle | San Francisco | -16 | |
| Sep 1, 2026Arrived | Seattle | San Francisco | -12 | |
| Aug 31, 2026Arrived | Seattle | San Francisco | 47 | |
| Aug 30, 2026Arrived | Seattle | San Francisco | 17 | |
| Aug 29, 2026Arrived | Seattle | San Francisco | -24 |