DL3999 Flight Status Delta Air Lines: Seattle to Orange County (DAL3999)
DL 3999 Seattle to Orange County Flight Status
Not scheduled today. Latest flight: July 30th, 2026 ; recent history is in the table below.
DL 3999 Flight Status & Schedule Delta Air Lines Seattle to Orange County
| Date | From | To | Departure | Arrival | Status | Details |
|---|---|---|---|---|---|---|
| Jul 30 | SEA | SNA | 13:54 | 16:55 | Scheduled | Track > |
| Jul 29 | SEA | SNA | 14:09 | 16:33 | Landed | Track > |
| Jul 28 | SEA | SNA | 14:19 | 16:43 | Landed | Track > |
| Jul 27 | SEA | SNA | 16:02 | 18:29 | Delayed | Track > |
| Jul 26 | SEA | SNA | 15:07 | 17:50 | Delayed | Track > |
| Jul 25 | SEA | SNA | 14:26 | 17:00 | Landed | Track > |
| Jul 24 | SEA | SNA | 14:31 | 17:01 | Landed | Track > |
| Jul 23 | SEA | SNA | 14:28 | 16:54 | Landed | Track > |
| Jul 22 | SEA | SNA | 14:24 | 16:50 | Landed | Track > |
| Jul 21 | SEA | SNA | 14:31 | 17:23 | Landed Late | Track > |
Delta Air Lines' Seattle–Orange County flight covers 1,576 km (979 mi). The timetable allows 3 h 1 min, but the flight usually takes about 2 h 25 min, so it often makes up time. It is not flying today; the last flight was scheduled on 30 July 2026.
About DL 3999
- Distance
- 1,576 km (979 mi)
- Typical flight time
- 2 h 25 min
- On time
- 6 of the last 7
- Average delay when late
- 28 min
DL 3999 FAQ
- How long is the DL3999 flight?
- The timetable allows 3 h 1 min. Seattle to Orange County is 1,576 km (979 mi).
- How often is DL3999 late?
- 1 of the last 7 flights arrived 15 or more minutes late; when late, by 28 minutes on average.
- Which terminal does DL3999 use?
- It usually arrives at Terminal A at Orange County John Wayne Airport (SNA). Check the flight card above for today's terminal and gate.
- What other flight numbers does DL3999 have?
- Also listed as DAL3999 (Delta Air Lines' ICAO code) and DL 3999.
DL3999 and Seattle SEA to Orange County SNA Flights
Flight DL3999 is code-shared by 4 airlines using the flight numbers AM4592, KE3091, KL7830, WS8104
Other flights departing from Seattle SEA: WN4956, AS2311, AS2131, AS2191
Other flights arriving at Orange County SNA: G41591, G43533, WN3712, WN3833
All flights connecting Seattle SEA to Orange County SNA.