| Date | From | To | Departure | Arrival | Status | |
|---|---|---|---|---|---|---|
| Dec 19 | SEA | SJC | 17:47 | 19:42 |
Landed Late
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| Dec 18 | SEA | SJC | 17:22 | 19:14 |
Landed Late
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| Dec 17 | SEA | SJC | 16:56 | 18:37 |
Landed
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| Dec 16 | SEA | SJC | 17:10 | 18:55 |
Landed
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| Dec 15 | SEA | SJC | 16:57 | 18:50 |
Landed
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| Dec 14 | SEA | SJC | 17:06 | 19:06 |
Landed
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| Dec 13 | SEA | SJC | 16:57 | 18:44 |
Landed
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| Dec 12 | SEA | SJC | 17:17 | 19:03 |
Landed
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| Dec 11 | SEA | SJC | 16:52 | 18:35 |
Landed
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| Dec 10 | SEA | SJC | 17:00 | 18:54 |
Landed
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Delta Air Lines Flight DL3999 connects Seattle, United States to San Jose, United States, taking off from Seattle Tacoma International Airport SEA and landing at San Jose International Airport SJC.
How long is the DL3999 flight from Seattle to San Jose?
The average flight time from Seattle to San Jose is 1 hour and 49 minutes. The flight distance is 1122 km / 697 miles and the average flight speed is 616 km/h / 383 mph.
What is the On-Time Performance (OTP) of Delta Air Lines Flight DL3999 Seattle to San Jose?
The Airportia On-Time Performance Rating for Delta Air Lines Flight DL3999 is 4.9/5 stars. This metric is calculated using data from the past 10 flights.
Which terminal is the flight DL3999 arriving at?
Flight DL3999 arrives at San Jose International Airport (SJC) Terminal A.
When was the latest DL3999 flight?
The latest flight took off on Saturday, December 20th, 2025 with the flight status being Landed on 19:42.
How else can the flight DL3999 be referenced as?
This Delta Air Lines flight can also be referenced as DAL3999, DL 3999, DAL 3999.
How often is flight DL3999 delayed?
On average, 40% of all DL3999 flights are delayed. The average delay is 20 minutes.
Can I get compensation for my delayed or cancelled DL3999 flight or baggage issues?
If your DL3999 flight was cancelled, delayed, or if you experienced baggage issues such as delayed, damaged, or lost bags, you may be entitled to compensation. Compensation amounts and eligibility depend on various regulations, including EC 261/2004, UK261, CA Montreal Convention, US GoodWill, BR-ANAC, SA-GACA and TK-SHY.
See our DL3999 Flight Tracker above for more details.
Flight DL3999 is code-shared by 5 airlines using the flight numbers AF2797, KE3085, KL6447, VS1941, WS7286
Other flights departing from Seattle SEA: DL945, WN2840, UA5250, Y42903
Other flights arriving at San Jose SJC: WN1555, WN1646, WN2979, WN3409
All flights connecting Seattle SEA to San Jose SJC.
