Apparatus

Try JFK, AAL1290, BAW, or N225AN.

flight_takeoff Flight

UAL1721

Operated by United Airlines

Live map

Live map filtered to UAL1721. 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
06:05 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
280° / 5 kt
Visibility
10 SM
Ceiling
FEW 9,000 ft
Temp / Dew
11°C / 7°C
Altimeter
29.85 inHg

Obs: 2026-10-12T12:56:00.000Z

Raw METAR / TAF 
METAR KSFO 121256Z 28005KT 10SM FEW090 11/07 A2985 RMK AO2 SLP109 T01060067 $

TAF KSFO 121120Z 1212/1318 26004KT P6SM FEW020 FEW090 FM122200 28012KT P6SM SKC FM130300 28006KT P6SM SKC

flight Live Traffic

flight_takeoff 111 Departures
flight_land 183 Arrivals

Arrival

KOA PHKO VFR

Ellison Onizuka Kona International Airport at Keāhole

Kailua-Kona, US

Local time
03:05 HST
Timezone
Pacific/Honolulu
Type
Large Airport
Elevation
47 ft
Coordinates
19.7388, -156.0456

cloud Weather

Wind
150° / 3 kt
Visibility
10 SM
Ceiling
SCT 8,500 ft
Temp / Dew
25°C / 19°C
Altimeter
29.91 inHg

Obs: 2026-10-12T12:53:00.000Z

Raw METAR / TAF 
METAR PHKO 121253Z AUTO 15003KT 10SM SCT085 25/19 A2991 RMK AO2 SLP131 T02500194

TAF PHKO 121134Z 1212/1318 VRB04KT P6SM FEW050 FM122000 24009KT P6SM SCT045 FM130500 VRB05KT P6SM FEW050

flight Live Traffic

flight_takeoff 6 Departures
flight_land 1 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-07-26 AA3AE2 SFO → KOA Jul 26, 20:45 UTCJul 26, 20:50 UTC5m - -
2026-07-26 AA3AE2 SFO → KOA Jul 26, 15:55 UTCJul 26, 16:35 UTC40m - -
2026-07-25 AA3B05 SFO → KOA Jul 25, 20:55 UTCJul 25, 21:05 UTC10m - -
2026-07-25 AA3B05 SFO → KOA Jul 25, 16:00 UTCJul 25, 16:45 UTC45m - -
2026-07-24 A76F87 SFO → KOA Jul 24, 20:10 UTCJul 24, 20:25 UTC15m - -
2026-07-24 A76F87 SFO → KOA Jul 24, 15:25 UTCJul 24, 15:55 UTC30m - -
2026-07-23 AA3AE9 SFO → KOA Jul 23, 23:30 UTCJul 23, 23:35 UTC5m - -
2026-07-23 AA3AE9 SFO → KOA Jul 23, 18:17 UTCJul 23, 23:31 UTC5h 14m +187m +32m
2026-07-23 AA3AE9 SFO → KOA Jul 23, 18:00 UTCJul 23, 19:05 UTC1h 5m - -
2026-07-22 AA3AE5 SFO → KOA Jul 22, 20:25 UTCJul 22, 20:35 UTC10m - -
2026-07-22 AA3AE5 SFO → KOA Jul 22, 15:35 UTCJul 22, 16:15 UTC40m - -
2026-07-21 A76F67 - Jul 21, 20:50 UTCJul 21, 20:55 UTC5m - -
2026-07-21 A76F67 - Jul 21, 16:00 UTCJul 21, 16:30 UTC30m - -
2026-07-20 A76F6C - Jul 20, 20:25 UTCJul 20, 20:35 UTC10m - -
2026-07-20 A76F6C - Jul 20, 15:40 UTCJul 20, 16:20 UTC40m - -
2026-07-19 A76F67 - Jul 19, 20:25 UTCJul 19, 20:40 UTC15m - -
2026-07-19 A76F67 - Jul 19, 15:45 UTCJul 19, 16:15 UTC30m - -
2026-07-18 A9EC06 - Jul 18, 20:15 UTCJul 18, 20:35 UTC20m - -
2026-07-18 A9EC06 SFO → KOA Jul 18, 15:32 UTCJul 18, 20:40 UTC5h 8m +22m -5m
2026-07-18 A9EC06 - Jul 18, 15:40 UTCJul 18, 16:10 UTC30m - -
2026-07-17 AA3AE4 - Jul 17, 20:10 UTCJul 17, 20:29 UTC20m - -
2026-07-17 AA3AE4 SFO → KOA Jul 17, 15:32 UTCJul 17, 20:25 UTC4h 53m +22m -16m
2026-07-17 AA3AE4 - Jul 17, 15:29 UTCJul 17, 16:10 UTC40m - -
2026-07-16 A9EC06 - Jul 16, 20:15 UTCJul 16, 20:25 UTC10m - -
2026-07-16 A9EC06 - Jul 16, 15:30 UTCJul 16, 16:09 UTC40m - -
2026-07-15 AA3AE4 - Jul 15, 20:15 UTCJul 15, 20:30 UTC15m - -
2026-07-15 AA3AE4 - Jul 15, 15:40 UTCJul 15, 16:10 UTC30m - -
2026-07-14 A9EC06 - Jul 14, 20:15 UTCJul 14, 20:35 UTC20m - -
2026-07-14 A9EC06 - Jul 14, 15:45 UTCJul 14, 16:20 UTC35m - -
2026-07-13 A76F87 - Jul 13, 16:15 UTCJul 13, 16:50 UTC35m - -

Performance history

Flights tracked
228 showing last 30
Avg arrival delay
+4m
On-time arrival
67% 67% on time
Aircraft used
9

Monthly activity 4 months

Month Flights tracked
July 2026 59
June 2026 65
May 2026 64
April 2026 40

UAL1721 frequently asked

Where does flight UAL1721 fly?
UAL1721 (United Airlines) flies from SFO to KOA. View the full route page.
How long is flight UAL1721?
Based on observed flights, UAL1721 takes on average 54m from takeoff to landing.
How often does UAL1721 fly?
UAL1721 has been observed flying several times a week in our tracking data. We've recorded 228 flights under this callsign.
Is flight UAL1721 usually on time?
Across recent flights, UAL1721 arrives with an average 4-minute delay. 67% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL1721?
UAL1721 has been operated by 9 different aircraft in our records. Tail numbers are listed in the recent history below.
Can I track UAL1721 live?
Yes. When UAL1721 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.