Apparatus

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flight_takeoff Flight

UAL521

Operated by UAL

Live map

Live map filtered to UAL521. Shown when the flight is currently airborne.

Upcoming flights 1 scheduled

From To Scheduled departure Estimated arrival Status
SFO ABQ May 30, 11:41 PM UTC May 31, 01:45 AM UTC PLANNED

Route airports View route page →

Departure

SFO KSFO MVFR

San Francisco International Airport

San Francisco, US

Local time
00:35 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
270° / 10 kt
Visibility
10 SM
Ceiling
OVC 1,000 ft
Temp / Dew
13°C / 11°C
Altimeter
30.11 inHg

Obs: 2026-05-30T06:56:00.000Z

Raw METAR / TAF 
METAR KSFO 300656Z 27010KT 10SM OVC010 13/11 A3011 RMK AO2 SLP195 T01280106

TAF KSFO 300520Z 3006/3112 26009KT P6SM OVC008 FM301000 27006KT P6SM OVC012 FM301800 28012KT P6SM SKC FM302300 27022KT P6SM SKC FM310600 28012KT P6SM SKC

flight Live Traffic

flight_takeoff 236 Departures
flight_land 160 Arrivals

Arrival

ABQ KABQ VFR

Albuquerque International Sunport

Albuquerque, US

Local time
01:35 MDT
Timezone
America/Denver
Type
Large Airport
Elevation
5,355 ft
Coordinates
35.0400, -106.6089

cloud Weather

Wind
270° / 6 kt
Visibility
10 SM
Ceiling
CLR
Temp / Dew
20°C / -7°C
Altimeter
30.00 inHg

Obs: 2026-05-30T06:52:00.000Z

Raw METAR / TAF 
METAR KABQ 300652Z 27006KT 10SM CLR 20/M07 A3000 RMK AO2 SLP076 T02001072 403000189

TAF KABQ 300520Z 3006/3106 25010G18KT P6SM SKC FM300800 28006KT P6SM SKC FM302000 27010G18KT P6SM SKC FM310100 33010KT P6SM SKC

flight Live Traffic

flight_takeoff 11 Departures
flight_land 17 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 A923EE JFK → SFO May 29, 23:30 UTCMay 30, 03:00 UTC3h 30m - -
2026-05-28 A923CD JFK → SFO May 28, 23:30 UTCMay 29, 02:50 UTC3h 20m - -
2026-05-27 A76028 JFK → SFO May 27, 23:55 UTCMay 28, 03:15 UTC3h 20m - -
2026-05-22 A6C248 JFK → SFO May 22, 23:35 UTCMay 23, 02:55 UTC3h 19m - -
2026-05-22 A44565 JFK → SFO May 22, 00:20 UTCMay 22, 03:35 UTC3h 15m - -
2026-05-20 A4423A JFK → SFO May 20, 23:55 UTCMay 21, 03:05 UTC3h 10m - -
2026-05-20 A097CE JFK → SFO May 20, 21:00 UTCMay 20, 22:40 UTC1h 40m - -
2026-05-20 A2B154 JFK → SFO May 20, 00:35 UTCMay 20, 04:00 UTC3h 25m - -
2026-05-19 A49510 JFK → SFO May 19, 20:10 UTCMay 19, 22:05 UTC1h 55m - -
2026-05-18 A5CF3F JFK → SFO May 18, 23:55 UTCMay 19, 03:20 UTC3h 25m - -
2026-05-18 A49F89 JFK → SFO May 18, 20:20 UTCMay 18, 22:10 UTC1h 50m - -
2026-05-17 A0E6C6 JFK → SFO May 17, 21:20 UTCMay 17, 23:25 UTC2h 5m - -
2026-05-17 A43EEC JFK → SFO May 17, 01:55 UTCMay 17, 05:15 UTC3h 20m - -
2026-05-17 A43EEC JFK → SFO May 17, 01:56 UTCMay 17, 05:13 UTC3h 17m +139m -7m
2026-05-16 A5CF3F JFK → SFO May 16, 00:20 UTCMay 16, 03:40 UTC3h 20m - -
2026-05-15 A49F89 JFK → SFO May 15, 21:05 UTCMay 15, 22:45 UTC1h 40m - -
2026-05-15 A5CC35 JFK → SFO May 15, 00:05 UTCMay 15, 03:25 UTC3h 20m - -
2026-05-14 A10E46 JFK → SFO May 14, 20:17 UTCMay 14, 21:44 UTC1h 27m +20m -15m
2026-05-14 A10E46 JFK → SFO May 14, 20:15 UTCMay 14, 21:45 UTC1h 30m - -
2026-05-13 A2B156 JFK → SFO May 13, 23:55 UTCMay 14, 03:20 UTC3h 25m - -
2026-05-13 A10E23 JFK → SFO May 13, 20:10 UTCMay 13, 21:50 UTC1h 40m - -
2026-05-13 A12777 JFK → SFO May 13, 00:00 UTCMay 13, 03:15 UTC3h 15m - -
2026-05-12 A9238A JFK → SFO May 12, 20:05 UTCMay 12, 21:50 UTC1h 45m - -
2026-05-12 A12733 JFK → SFO May 12, 02:45 UTCMay 12, 02:55 UTC10m - -
2026-05-11 AA7E7A JFK → SFO May 11, 20:15 UTCMay 11, 22:05 UTC1h 50m - -
2026-05-10 A0BF26 JFK → SFO May 10, 22:15 UTCMay 11, 00:10 UTC1h 55m +138m -9m
2026-05-10 A0BF26 JFK → SFO May 10, 22:15 UTCMay 11, 00:15 UTC2h 0m - -
2026-05-10 A5CF3C JFK → SFO May 10, 01:34 UTCMay 10, 04:29 UTC2h 55m - -
2026-05-10 A5CF3C JFK → SFO May 10, 01:31 UTCMay 10, 04:29 UTC2h 58m +114m -17m
2026-05-09 A12403 JFK → SFO May 9, 00:05 UTCMay 9, 03:05 UTC3h 0m - -

Performance history

Flights tracked
92 showing last 30
Avg arrival delay
-12m
On-time arrival
100% 100% on time
Aircraft used
24

Monthly activity 2 months

Month Flights tracked
May 2026 43
April 2026 49

UAL521 frequently asked

Where does flight UAL521 fly?
UAL521 (UAL) flies from SFO to ABQ. View the full route page.
How long is flight UAL521?
Based on observed flights, UAL521 takes on average 2h 34m from takeoff to landing.
How often does UAL521 fly?
UAL521 has been observed flying several times a week in our tracking data. We've recorded 92 flights under this callsign.
Is flight UAL521 usually on time?
Across recent flights, UAL521 arrives 12 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL521?
UAL521 has been operated by 24 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL521 live?
Yes. When UAL521 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.