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 MVFR

San Francisco International Airport

San Francisco, US

Local time
20:13 PDT
Timezone
America/Los_Angeles
Type
Large Airport
Elevation
13 ft
Coordinates
37.6198, -122.3748

cloud Weather

Wind
270° / 14 kt
Visibility
10 SM
Ceiling
FEW 300 ft, BKN 1,000 ft, BKN 3,500 ft
Temp / Dew
14°C / 11°C
Altimeter
30.09 inHg

Obs: 2026-05-30T02:56:00.000Z

Raw METAR / TAF 
METAR KSFO 300256Z 27014KT 10SM FEW003 BKN010 BKN035 14/11 A3009 RMK AO2 SLP188 T01390111 53002

TAF KSFO 300301Z 3003/3106 27012KT P6SM BKN013 FM300600 26010KT P6SM OVC009 FM300900 26005KT P6SM BKN012 FM301700 29010KT P6SM SKC FM302000 28018KT P6SM SKC

warning FAA Advisories

  • Ground Delay: low ceilings (avg 1 hour and 5 minutes)

flight Live Traffic

flight_takeoff 232 Departures
flight_land 277 Arrivals

Arrival

KOA PHKO VFR

Ellison Onizuka Kona International Airport at Keāhole

Kailua-Kona, US

Local time
17:13 HST
Timezone
Pacific/Honolulu
Type
Large Airport
Elevation
47 ft
Coordinates
19.7388, -156.0456

cloud Weather

Wind
220° / 9 kt
Visibility
10 SM
Ceiling
BKN 7,500 ft
Temp / Dew
28°C / 19°C
Altimeter
29.96 inHg

Obs: 2026-05-30T02:53:00.000Z

Raw METAR / TAF 
METAR PHKO 300253Z 22009KT 10SM BKN075 28/19 A2996 RMK AO2 SLP145 T02780194 58005

TAF PHKO 300259Z 3003/3106 22010KT P6SM SCT030 BKN050 FM300600 VRB06KT P6SM SCT030 SCT050 FM302000 24010KT P6SM FEW030

flight Live Traffic

flight_takeoff 23 Departures
flight_land 15 Arrivals

Recent history last 30

DateAircraftRouteTakeoffLandingDurationDep ΔArr Δ
2026-05-29 AA8A07 SFO → KOA May 29, 15:32 UTCMay 29, 20:24 UTC4h 52m +22m -1m
2026-05-29 AA8A07 SFO → KOA May 29, 15:25 UTCMay 29, 15:45 UTC20m - -
2026-05-28 A76F68 SFO → KOA May 28, 20:45 UTCMay 28, 20:55 UTC10m - -
2026-05-28 A76F68 SFO → KOA May 28, 16:10 UTCMay 28, 16:35 UTC25m - -
2026-05-27 AA8114 SFO → KOA May 27, 20:45 UTCMay 27, 20:55 UTC10m - -
2026-05-27 AA8114 SFO → KOA May 27, 16:22 UTCMay 27, 20:49 UTC4h 27m +72m -22m
2026-05-27 AA8114 SFO → KOA May 27, 16:35 UTCMay 27, 17:00 UTC25m - -
2026-05-26 A76F67 SFO → KOA May 26, 20:05 UTCMay 26, 20:09 UTC5m - -
2026-05-26 A76F67 SFO → KOA May 26, 15:29 UTCMay 26, 15:54 UTC25m - -
2026-05-25 AA3AE9 SFO → KOA May 25, 20:09 UTCMay 25, 20:24 UTC15m - -
2026-05-25 AA3AE9 SFO → KOA May 25, 15:45 UTCMay 25, 16:15 UTC30m - -
2026-05-24 AA8A07 SFO → KOA May 24, 20:05 UTCMay 24, 20:15 UTC10m - -
2026-05-24 AA8A07 SFO → KOA May 24, 15:30 UTCMay 24, 16:00 UTC30m - -
2026-05-23 AA3AE9 SFO → KOA May 23, 20:00 UTCMay 23, 20:20 UTC20m - -
2026-05-23 AA3AE9 SFO → KOA May 23, 15:35 UTCMay 23, 16:05 UTC30m - -
2026-05-22 AA8A09 SFO → KOA May 22, 20:15 UTCMay 22, 20:40 UTC25m - -
2026-05-22 AA8A09 SFO → KOA May 22, 15:40 UTCMay 22, 16:05 UTC25m - -
2026-05-21 AA3AE9 SFO → KOA May 21, 20:15 UTCMay 21, 20:30 UTC15m - -
2026-05-21 AA3AE9 SFO → KOA May 21, 15:50 UTCMay 21, 16:15 UTC25m - -
2026-05-20 AA3AE2 SFO → KOA May 20, 20:05 UTCMay 20, 20:20 UTC15m - -
2026-05-20 AA3AE2 SFO → KOA May 20, 15:30 UTCMay 20, 15:55 UTC25m - -
2026-05-19 AA3AE2 SFO → KOA May 19, 20:15 UTCMay 19, 20:30 UTC15m - -
2026-05-19 AA3AE2 SFO → KOA May 19, 15:45 UTCMay 19, 16:10 UTC25m - -
2026-05-18 AA3AE9 SFO → KOA May 18, 20:20 UTCMay 18, 20:35 UTC15m - -
2026-05-18 AA3AE9 SFO → KOA May 18, 15:42 UTCMay 18, 20:33 UTC4h 51m +32m -12m
2026-05-18 AA3AE9 SFO → KOA May 18, 15:35 UTCMay 18, 16:00 UTC25m - -
2026-05-17 AA3AE4 SFO → KOA May 17, 20:20 UTCMay 17, 20:35 UTC15m - -
2026-05-17 AA3AE4 SFO → KOA May 17, 15:35 UTCMay 17, 16:01 UTC25m - -
2026-05-16 AA3AE4 SFO → KOA May 16, 20:05 UTCMay 16, 20:25 UTC20m - -
2026-05-16 AA3AE4 SFO → KOA May 16, 15:32 UTCMay 16, 20:30 UTC4h 58m +22m -6m

Performance history

Flights tracked
99 showing last 30
Avg arrival delay
-10m
On-time arrival
100% 100% on time
Aircraft used
8

Monthly activity 2 months

Month Flights tracked
May 2026 59
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 56m 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 99 flights under this callsign.
Is flight UAL1721 usually on time?
Across recent flights, UAL1721 arrives 10 minutes early on average. 100% of flights arrive within 15 minutes of schedule.
What aircraft operates flight UAL1721?
UAL1721 has been operated by 8 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.