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
03:48 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
310° / 5 kt
Visibility
10 SM
Ceiling
FEW 800 ft
Temp / Dew
13°C / 11°C
Altimeter
30.01 inHg

Obs: 2026-10-13T09:56:00.000Z

Raw METAR / TAF 
METAR KSFO 130956Z 31005KT 10SM FEW008 13/11 A3001 RMK AO2 SLP160 T01330111 $

TAF KSFO 130831Z 1309/1412 23005KT P6SM FEW009 FM132000 32011KT P6SM SKC FM140400 28006KT P6SM SKC

flight Live Traffic

flight_takeoff 118 Departures
flight_land 118 Arrivals

Arrival

JFK KJFK VFR

John F. Kennedy International Airport

New York, US

Local time
06:48 EDT
Timezone
America/New_York
Type
Large Airport
Elevation
13 ft
Coordinates
40.6394, -73.7793

cloud Weather

Wind
260° / 3 kt
Visibility
10 SM
Ceiling
SCT 25,000 ft
Temp / Dew
15°C / 14°C
Altimeter
29.97 inHg

Obs: 2026-10-13T09:51:00.000Z

Raw METAR / TAF 
METAR KJFK 130951Z 26003KT 10SM SCT250 15/14 A2997 RMK AO2 SLP148 T01500139 $

TAF KJFK 130830Z 1309/1412 VRB03KT P6SM FEW250 FM131400 14006KT P6SM SCT250 FM131600 17010KT P6SM FEW020 BKN200 FM140000 20009KT P6SM SCT250 FM140900 23009KT P6SM FEW250

flight Live Traffic

flight_takeoff 295 Departures
flight_land 405 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.