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UA643

SNA → IAH · Boeing 737-700 · United Airlines

For travellers

Departure · Santa Ana (SNA)

Gate 10
Scheduled 01 Oct 15:14 · Departed 01 Oct 16:30 · +76 min
Board status: Departed
Airborne since 01 Oct 16:40 (ADS-B)

Arrival · Houston (IAH)

Gate E15 · Baggage belt C6
Scheduled 01 Oct 20:33 · Landed 01 Oct 22:50 · +137 min
Board status: Landed
Landed 01 Oct 22:38 (airport data)

Board data from houston, sna, updated 53 min ago; times local to each airport.

Flight

Status
Completed (landing confirmed by airport data)
Arrival confirmed via
Airport data (confirmed)
Departure
John Wayne Airport-Orange County Airport (SNA) — Santa Ana, United States
Scheduled departure
2026-10-01 22:14 UTC
Departed
2026-10-01 23:40 UTC
Arrival
George Bush Intercontinental Houston Airport (IAH) — Houston, United States
Scheduled arrival
2026-10-02 01:33 UTC
Estimated arrival
2026-10-02 03:41 UTC
Distance flown
3066 km
Straight-line distance
2163 km

Aircraft

Registration
N39728
Type
Boeing 737-700
Seats
126 total (78 Economy, 36 Economy Plus, 12 Business)
CO2 (EMEP est., total)
46.6 t (480 kg/pax Business, 358 kg/pax Economy)

Altitude & speed

Max altitude
40,025 ft
Max ground speed
497 kt
Tracked
3h 53m · 3,063 km
Altitude (ft, max 40,025)
021,61443,2270m30m1h 0m1h 30m2h 0m2h 30m3h 0m3h 30m
Ground speed (kt, max 497)
02685370m30m1h 0m1h 30m2h 0m2h 30m3h 0m3h 30m
Altitude (ft, max 40,025)
021,61443,2270m1h 0m2h 0m3h 0m
Ground speed (kt, max 497)
02685370m1h 0m2h 0m3h 0m

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

DepartedFlightRouteRegAircraftStatusDistance
2026-10-01 23:40 UTC UAL643 SNA → IAH
Santa Ana → Houston
 N39728 Boeing 737-700 Completed (landing confirmed by airport data) 3066 km
2026-10-01 17:12 UTC UAL643 SFO → SNA
San Francisco → Santa Ana
 N77259 Boeing 737 MAX 8 Completed 752 km
2026-10-01 12:50 UTC UAL643 LAS → SFO
Las Vegas → San Francisco
 N39475 Boeing 737-900 Completed (landing confirmed by airport data) 744 km
2026-09-30 22:11 UTC UAL643 SNA → IAH
Santa Ana → Houston
 N39728 Boeing 737-700 Completed (landing confirmed by airport data) 2253 km
2026-09-30 17:16 UTC UAL643 SFO → SNA
San Francisco → Santa Ana
 N17341 Boeing 737 MAX 8 Completed 762 km
2026-09-30 12:54 UTC UAL643 LAS → SFO
Las Vegas → San Francisco
 N17413 Boeing 737 MAX 9 Completed 754 km
2026-09-29 22:18 UTC UAL643 SNA → IAH
Santa Ana → Houston
 N24706 Boeing 737-700 Incomplete (signal lost) 2242 km

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