DL3999 Delta Air Lines - Flight Status
Codeshare Flights
The flight KE3085 from Korean Air (KE) is a codeshare flight operated by Delta Air Lines (DL) under the flight number DL3999. Check this page for details about flight DL3999.
Below, you can find details about Delta Air Lines flight DL3999, which currently operates between the airports of Seattle - Seattle-Tacoma International Airport (Airport Code SEA) and San Jose - San Jose Mineta International Airport (Airport Code SJC).
This flight data pertains specifically to the flight's details for Saturday, October 11, 2025.
Table of contents:
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights DL3999
Flight Status Codeshare Flights Additional Information Alternative Flights Punctuality and delays Last Past Flights DL3999
DL3999 On Time performance:
100
We have calculated the percentage of flights that arrived within 15 minutes of their scheduled time, or earlier, based on real flight data from the last 3 months. More about punctuality and delays Flight Status
DL3999 Delta Air Lines to San Jose
Landed - On-time
Flight Status for Saturday October 11, 2025
This flight is also scheduled for Today (October 12, 2025). See it here
This flight is also scheduled for Tomorrow (October 13, 2025). See it here
Landed - On-time
Flight Status for Saturday October 11, 2025
Departure
Seattle (SEA)
October 11, 2025
Seattle-Tacoma International Airport
Departed at:
04:29 pm
Gate:
A12
Scheduled Departure Time: 04:35 pm
Arrival
San Jose (SJC)
October 11, 2025
San Jose Mineta International Airport
Arrived at:
06:33 pm
Terminal:
A
Gate:
12
Scheduled Arrival Time: 06:48 pm
Disclaimer
The information displayed on this website is gathered from third-party providers with a wide reputation on the sector, which in turn obtain the information from the airlines. This data is provided only for informative purposes. www.seattle-airport.com assumes no responsibility for loss or damage as a result of relying on information posted here. Please contact your airline to verify flight status.
Codeshare Flights
This flight is shared with other airlines, this means that these other flights are the same:
- KE3085 - Korean Air
- KL5039 - KLM Royal Dutch Airlines
- VS2361 - Virgin Atlantic
Additional Information
Which is the frequency of flight DL3999?
The flight DL3999 is scheduled to flight on daily basis.
Which is the distance of flight DL3999?
The distance between the two airports is 697 miles.
Which is the flight time of flight DL3999?
The scheduled flight time gate to gate is: 02:13 hours.
The real flight time gate to gate on average is: 02:13 hours.
Are the departure airport and arrival airport at the same Time Zone?
Yes, both airports are in the same timezone.
The flight DL3999 is scheduled to flight on daily basis.
Which is the distance of flight DL3999?
The distance between the two airports is 697 miles.
Which is the flight time of flight DL3999?
The scheduled flight time gate to gate is: 02:13 hours.
The real flight time gate to gate on average is: 02:13 hours.
Are the departure airport and arrival airport at the same Time Zone?
Yes, both airports are in the same timezone.
Alternative Flights
The following airlines serves the same route between Seattle and San Jose:
Alaska Airlines
- Flight Number: AS1046. (On Time performance: 70 - Average Delay: 16 minutes)
- Flight Number: AS1079. (On Time performance: 67 - Average Delay: 15 minutes)
- Flight Number: AS1080. (On Time performance: 79 - Average Delay: 10 minutes)
- Flight Number: AS1114. (On Time performance: 68 - Average Delay: 16 minutes)
- Flight Number: AS1200. (On Time performance: 80 - Average Delay: 13 minutes)
- Flight Number: AS1226. (On Time performance: 92 - Average Delay: 4 minutes)
- Flight Number: AS1310. (On Time performance: 72 - Average Delay: 14 minutes)
Delta Air Lines
- Flight Number: DL3557. (On Time performance: 93 - Average Delay: 11 minutes)
- Flight Number: DL3559. (On Time performance: 90 - Average Delay: 4 minutes)
- Flight Number: DL3789. (On Time performance: 82 - Average Delay: 11 minutes)
- Flight Number: DL3840. (On Time performance: 97 - Average Delay: 4 minutes)
Southwest Airlines
- Flight Number: WN170. (On Time performance: 74 - Average Delay: 11 minutes)
- Flight Number: WN2247. (On Time performance: 60 - Average Delay: 15 minutes)
- Flight Number: WN4260. (On Time performance: 82 - Average Delay: 7 minutes)
- Flight Number: WN4263. (On Time performance: 55 - Average Delay: 17 minutes)
- Flight Number: WN4444. (On Time performance: 56 - Average Delay: 19 minutes)
- Flight Number: WN503. (On Time performance: 100 - Average Delay: 1 minutes)
Alaska Airlines
- Flight Number: AS1046. (On Time performance: 70 - Average Delay: 16 minutes)
- Flight Number: AS1079. (On Time performance: 67 - Average Delay: 15 minutes)
- Flight Number: AS1080. (On Time performance: 79 - Average Delay: 10 minutes)
- Flight Number: AS1114. (On Time performance: 68 - Average Delay: 16 minutes)
- Flight Number: AS1200. (On Time performance: 80 - Average Delay: 13 minutes)
- Flight Number: AS1226. (On Time performance: 92 - Average Delay: 4 minutes)
- Flight Number: AS1310. (On Time performance: 72 - Average Delay: 14 minutes)
Delta Air Lines
- Flight Number: DL3557. (On Time performance: 93 - Average Delay: 11 minutes)
- Flight Number: DL3559. (On Time performance: 90 - Average Delay: 4 minutes)
- Flight Number: DL3789. (On Time performance: 82 - Average Delay: 11 minutes)
- Flight Number: DL3840. (On Time performance: 97 - Average Delay: 4 minutes)
Southwest Airlines
- Flight Number: WN170. (On Time performance: 74 - Average Delay: 11 minutes)
- Flight Number: WN2247. (On Time performance: 60 - Average Delay: 15 minutes)
- Flight Number: WN4260. (On Time performance: 82 - Average Delay: 7 minutes)
- Flight Number: WN4263. (On Time performance: 55 - Average Delay: 17 minutes)
- Flight Number: WN4444. (On Time performance: 56 - Average Delay: 19 minutes)
- Flight Number: WN503. (On Time performance: 100 - Average Delay: 1 minutes)
Punctuality and delays
We have gathered data from recent months and present below an analysis of how timely the flights have been.
Delays analyzed by Week: It is not possible to calculate the On-Time Performance for this flight accurately by weekday due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Delays analyzed by Month: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions
In terms of On-Time Performance, by analyzing the flight data from the last three months, spanning from October 06, 2025 to October 10, 2025, we have obtained these figures.
Total number of flights: 5
On Time: 5 ( 100 % )
Moderate Delay: 0 ( 0 % )
Significant Delay: 0 ( 0 % )
Major Delay: 0 ( 0 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )
Average Delay: 1 minutes.
Total number of flights: 5
On Time: 5 ( 100 % )
Moderate Delay: 0 ( 0 % )
Significant Delay: 0 ( 0 % )
Major Delay: 0 ( 0 % )
Canceled: 0 ( 0 % )
Diverted: 0 ( 0 % )
Average Delay: 1 minutes.
Delays analyzed by Month: It is not possible to calculate the On-Time Performance for this flight accurately by month due to insufficient or non-representative data, as doing so could lead to misleading conclusions
Last Past Flights DL3999
Date
Departure
Arrival
Duration
Aircraft
Status
Saturday
11 October
11 October
04:29 pm
Seattle (SEA)
Seattle (SEA)
06:33 pm
San Jose (SJC)
San Jose (SJC)
02h 04min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Friday
10 October
10 October
04:41 pm
Seattle (SEA)
Seattle (SEA)
06:56 pm
San Jose (SJC)
San Jose (SJC)
02h 15min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Thursday
09 October
09 October
04:41 pm
Seattle (SEA)
Seattle (SEA)
07:00 pm
San Jose (SJC)
San Jose (SJC)
02h 19min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Wednesday
08 October
08 October
04:37 pm
Seattle (SEA)
Seattle (SEA)
06:48 pm
San Jose (SJC)
San Jose (SJC)
02h 11min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Tuesday
07 October
07 October
04:38 pm
Seattle (SEA)
Seattle (SEA)
06:49 pm
San Jose (SJC)
San Jose (SJC)
02h 11min
Embraer 175 (E
Embraer 175 (E
Landed - On-time
Monday
06 October
06 October
04:35 pm
Seattle (SEA)
Seattle (SEA)
06:43 pm
San Jose (SJC)
San Jose (SJC)
02h 08min
Embraer 175 (E
Embraer 175 (E
Landed - On-time