Delta Air Lines DL3991 Flight Status
According to real-time data from Trip.com, flight DL3991, operated by Delta Air Lines and scheduled to fly from San Francisco (SFO to Seattle (SEA), has been cancelled. Please contact the airline or airport counter for the latest information.
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Cancelled
Please refer to the airline for the latest information
2h 15m
Check-in Counter
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Boarding Gate
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Arrival Gate
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Baggage
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Information provided by VariFlight. Please refer to airport announcements for the most up-to-date information. You can also explore more flights from San Francisco to Seattle or track other flights with our flight status tracker.
DL3991 Aircraft Details
According to Trip.com real-time data, the DL3991 flight flying from San Francisco to Seattle on 9/20/2026 is operated by the aircraft model Embraer 175. This aircraft has been in service for 10y, 1m. The aircraft is equipped with 76 seats.
Embraer 175
Punctuality (Departure)
60%
Punctuality (Arrival)
93%
Early on average
14 minutes
Age
10y, 1m
Seats
76
Flight Distance
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Economy
First
Premium Economy
In-Flight Services
Snacks
In-flight entertainment is unavailable
Wi-Fi (additional charge)
Power outlet
Seat Information
79 cm
More legroom than on 38% of flights
46 cm
Seat width better than on 94% of flights
100°
Reclining Angle
2-2
Seat layout example
In-Flight Services
Meal included
In-flight entertainment is unavailable
Wi-Fi (additional charge)
Power outlet
Seat Information
94 cm
More legroom than on 20% of flights
51 cm
Seat width better than on 10% of flights
135°
Reclining Angle
1-2
Seat layout example
In-Flight Services
Meal included
In-flight entertainment is unavailable
Wi-Fi is available
No power outlets are available
Seat Information
86 cm
Legroom
46 cm
Seat width better than on 92% of flights
120°
Reclining Angle
--
Seat layout example
See more amenities and seat info in the app
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DL3991 On-Time Performance
Based on the average performance of this flight over the past 30 trips, the on-time departure rate of DL3991 is 60% (Late on average 31 minutes), and the on-time arrival rate is 93% (Early on average 14 minutes).
On-Time Departures
Punctuality
60%
Late on average 31 minutes
Early
0%
On time
60%
30 mins late
23%
60 mins late
13%
90 mins late
3%
Cancelled
0%
On-Time Arrivals
Punctuality
93%
Early on average 14 minutes
Early
67%
On time
27%
30 mins late
3%
60 mins late
3%
90 mins late
0%
Cancelled
0%
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Cheap return flights to San Francisco
- Wed, Nov 4Seattle (SEA)San Francisco (SFO)
Alaska AirlinesOne way11% offTRY 2,398TRY 2,136 - Sun, Nov 1Seattle (SEA)San Francisco (SFO) Alaska AirlinesOne way10% offTRY 2,398TRY 2,151
- Thu, Oct 15Seattle (SEA)San Francisco (SFO) Alaska AirlinesOne way10% offTRY 2,398TRY 2,158
- Sat, Oct 17Seattle (SEA)San Francisco (SFO) Delta Air LinesOne way10% offTRY 2,398TRY 2,158
- Fri, Oct 30Seattle (SEA)San Francisco (SFO) Alaska AirlinesOne way10% offTRY 2,398TRY 2,158
- Sat, Oct 31Seattle (SEA)San Francisco (SFO) Alaska AirlinesOne way10% offTRY 2,398TRY 2,158
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Frequently Asked Questions
What is the current status of flight dl3991?
Flight dl3991 has been canceled (status: Cancelled). Contact Delta Air Lines or your booking channel for rebooking or refund (updated Sep 20, 2026).Is flight dl3991 on time today?
Flight dl3991 has been canceled (status: Cancelled). Contact Delta Air Lines or your booking channel for rebooking or refund options; if booked on Trip.com, use Manage Booking.What route does flight dl3991 fly?
Flight dl3991 is operated by Delta Air Lines from San Francisco (SFO) to Seattle (SEA). Typical flight time is about 2 hours 15 minutes; operating days may include Sunday.How can I check real-time status for flight dl3991?
Track flight dl3991 on this Trip.com status page for live departure, arrival, gate and baggage updates. For push alerts on the go, open the same flight in the Trip.com App and turn on flight notifications.If flight dl3991 is delayed or canceled, what should I do?
If dl3991 is delayed or canceled, first confirm the latest status here (Cancelled, updated Sep 20, 2026). Contact Delta Air Lines or your booking channel for rebooking or refund options, and check Trip.com Manage Booking if you booked on Trip.com.Has flight dl3991 departed from San Francisco?
Flight dl3991 has been canceled and did not depart from San Francisco (SFO). Contact Delta Air Lines or your booking channel for next steps.What is the seat configuration for flight dl3991?
Flight dl3991 usually flies a Embraer 175 with seat layout 2-2. Layouts can differ by aircraft subtype and cabin product—confirm your seat map in Manage Booking after you purchase.
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