Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

DAL521

Operated by Delta Air Lines

Live map

Live map filtered to DAL521. Shown when the flight is currently airborne.

Route airports View route page →

Departure

SFO KSFO VFR

San Francisco International Airport

San Francisco, US

Local time
01:13 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
300° / 9 kt
Visibility
10 SM
Ceiling
FEW 300 ft, FEW 20,000 ft
Temp / Dew
14°C / 13°C
Altimeter
29.98 inHg

Obs: 2026-08-29T07:56:00.000Z

Raw METAR / TAF 
METAR KSFO 290756Z 30009KT 10SM FEW003 FEW200 14/13 A2998 RMK AO2 SLP152 T01390128 401830139 $

TAF KSFO 290520Z 2906/3012 28014KT P6SM FEW012 TEMPO 2906/2908 BKN012 FM290800 29008KT P6SM OVC012 FM291800 29015G25KT P6SM FEW015 FM300500 27012KT P6SM BKN010

flight Live Traffic

flight_takeoff 167 Departures
flight_land 71 Arrivals

Arrival

JFK KJFK VFR

John F. Kennedy International Airport

New York, US

Local time
04:13 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
13 ft
Coordinates
40.6394, -73.7793

cloud Weather

Wind
10° / 13 kt
Visibility
10 SM
Ceiling
FEW 25,000 ft
Temp / Dew
19°C / 11°C
Altimeter
30.15 inHg

Obs: 2026-08-29T07:51:00.000Z

Raw METAR / TAF 
METAR KJFK 290751Z 01013KT 10SM FEW250 19/11 A3015 RMK AO2 SLP208 T01940111 $

TAF KJFK 290522Z 2906/3012 35010KT P6SM SKC FM290900 01008KT P6SM SKC FM291900 20007KT P6SM SKC FM300400 23006KT P6SM SKC

flight Live Traffic

flight_takeoff 98 Departures
flight_land 109 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 A3F4D7 SFO → JFK Jul 26, 19:05 UTCJul 26, 21:40 UTC2h 35m - -
2026-07-26 A3F4D7 SFO → JFK Jul 26, 14:40 UTCJul 26, 17:25 UTC2h 45m - -
2026-07-25 A39E6B SFO → JFK Jul 25, 16:55 UTCJul 25, 19:35 UTC2h 40m - -
2026-07-24 A3696E SFO → JFK Jul 24, 19:05 UTCJul 24, 21:35 UTC2h 30m - -
2026-07-24 A3696E SFO → JFK Jul 24, 14:50 UTCJul 24, 17:40 UTC2h 50m - -
2026-07-23 A376EC SFO → JFK Jul 23, 19:15 UTCJul 23, 22:00 UTC2h 45m - -
2026-07-23 A376EC SFO → JFK Jul 23, 14:45 UTCJul 23, 17:25 UTC2h 40m - -
2026-07-22 A3AD47 SFO → JFK Jul 22, 19:10 UTCJul 22, 21:50 UTC2h 40m - -
2026-07-22 A3AD47 SFO → JFK Jul 22, 14:40 UTCJul 22, 17:20 UTC2h 40m - -
2026-07-21 A37AA3 SFO → JFK Jul 21, 19:15 UTCJul 21, 21:50 UTC2h 35m - -
2026-07-21 A37AA3 SFO → JFK Jul 21, 14:45 UTCJul 21, 17:25 UTC2h 40m - -
2026-07-20 A3897F SFO → JFK Jul 20, 18:55 UTCJul 20, 21:30 UTC2h 35m - -
2026-07-20 A3897F SFO → JFK Jul 20, 14:45 UTCJul 20, 17:30 UTC2h 45m - -
2026-07-19 A396FD SFO → JFK Jul 19, 19:00 UTCJul 19, 21:35 UTC2h 35m - -
2026-07-19 A396FD SFO → JFK Jul 19, 14:45 UTCJul 19, 17:30 UTC2h 45m - -
2026-07-18 A3B86C - Jul 18, 17:00 UTCJul 18, 19:45 UTC2h 45m - -
2026-07-17 A3F88E - Jul 17, 18:55 UTCJul 17, 21:30 UTC2h 35m - -
2026-07-17 A3F88E DFW → LAX Jul 17, 18:54 UTCJul 17, 21:26 UTC2h 32m +9m +7m
2026-07-17 A3F88E - Jul 17, 14:50 UTCJul 17, 17:25 UTC2h 35m - -
2026-07-16 A3F88E - Jul 16, 20:15 UTCJul 16, 22:49 UTC2h 35m - -
2026-07-16 A3F88E - Jul 16, 16:09 UTCJul 16, 18:55 UTC2h 45m - -
2026-07-15 A3DC34 DFW → LAX Jul 15, 19:05 UTCJul 15, 21:45 UTC2h 40m - -
2026-07-15 A3DC34 - Jul 15, 14:50 UTCJul 15, 17:35 UTC2h 45m - -
2026-07-14 A41131 DFW → LAX Jul 14, 19:05 UTCJul 14, 21:45 UTC2h 40m - -
2026-07-14 A41131 LAX → DFW Jul 14, 14:50 UTCJul 14, 17:35 UTC2h 45m - -
2026-07-13 A385C8 - Jul 13, 19:05 UTCJul 13, 21:40 UTC2h 35m - -
2026-07-13 A385C8 - Jul 13, 14:55 UTCJul 13, 17:40 UTC2h 45m - -
2026-07-12 A3C233 - Jul 12, 19:15 UTCJul 12, 21:50 UTC2h 35m - -
2026-07-12 A3C233 - Jul 12, 14:50 UTCJul 12, 17:45 UTC2h 55m - -
2026-07-11 A36F7E - Jul 11, 16:50 UTCJul 11, 19:40 UTC2h 50m - -

Performance history

Flights tracked
153 showing last 30
Avg arrival delay
+7m
On-time arrival
100% 100% on time
Aircraft used
15

Monthly activity 4 months

Month Flights tracked
July 2026 41
June 2026 37
May 2026 46
April 2026 29

DAL521 frequently asked

Where does flight DAL521 fly?
DAL521 (Delta Air Lines) flies from SFO to JFK. View the full route page.
How long is flight DAL521?
Based on observed flights, DAL521 takes on average 2h 41m from takeoff to landing.
How often does DAL521 fly?
DAL521 has been observed flying several times a week in our tracking data. We've recorded 153 flights under this callsign.
Is flight DAL521 usually on time?
Across recent flights, DAL521 arrives with an average 7-minute delay. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight DAL521?
DAL521 has been operated by 15 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track DAL521 live?
Yes. When DAL521 is currently airborne, the live tracker map above shows its real-time position from ADS-B broadcasts. If the map is empty, the flight is not currently in the air.