UA1721

SFO → KOA · Boeing 737 MAX 9 · United Airlines

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For travellers

Departure · San Francisco (SFO)

Terminal T3 · Gate E9

Scheduled 08:10 · Departed 08:08

Board status: Departed

Airborne since 08:36 (ADS-B)

Board data from sfo, updated 106 min ago; times local to each airport.

Flight

Status

In progress

Departure

San Francisco International Airport (SFO) — San Francisco, United States

Scheduled departure

2026-10-02 15:10 UTC

Departed

2026-10-02 15:36 UTC

Arrival

Ellison Onizuka Kona International Airport at Keahole (KOA) — Kailua-Kona, United States (scheduled)

Progress

100%

Codeshares

AC3529, AZ4487

Distance flown

3883 km

Straight-line distance

3808 km

Aircraft

Registration

N47505

Type

Boeing 737 MAX 9

Seats

179 total (117 Economy, 42 Economy Plus, 20 First)

CO2 (EMEP est., total)

77.1 t (547 kg/pax Business, 417 kg/pax Economy)

Altitude & speed

Max altitude

32,000 ft

Max ground speed

444 kt

Tracked

5h 2m · 3,883 km

Note

still in progress - the track so far

Altitude (ft, max 32,000)

Ground speed (kt, max 444)

Altitude (ft, max 32,000)

Ground speed (kt, max 444)

From the ADS-B positions we received; time since the first fix. A dashed stretch is a gap in reception, bridged by a straight line.

Route map

Airline

United Airlines (UAL)

Latest flights

Departed	Flight	Route	Reg	Aircraft	Status	Distance
2026-10-02 15:36 UTC	UAL1721	SFO → KOA San Francisco → Kailua-Kona	N47505	Boeing 737 MAX 9	In progress	~3808 km est.
2026-10-01 15:32 UTC	UAL1721	SFO → KOA San Francisco → Kailua-Kona	N17413	Boeing 737 MAX 9	Completed (landing presumed)	3902 km
2026-09-30 15:25 UTC	UAL1721	SFO → KOA San Francisco → Kailua-Kona	N17430	Boeing 737 MAX 9	Completed	3895 km

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