UAL643

For travellers

Departure · Santa Ana (SNA)

Gate 8

Scheduled 30 Sep 15:14 · Departed 30 Sep 15:06 · early

Board status: Departed

Airborne since 30 Sep 15:11 (ADS-B)

Arrival · Houston (IAH)

Gate C43 · Baggage belt C6

Scheduled 30 Sep 20:33 · Landed 30 Sep 20:11 · early

Board status: Landed

Landed 30 Sep 20:12 (airport data)

Board data from houston, sna, updated 2076 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

2026-09-30 22:14 UTC

Departed

2026-09-30 22:11 UTC

Arrival

George Bush Intercontinental Houston Airport (IAH) — Houston, United States

Scheduled arrival

2026-10-01 01:33 UTC

Estimated arrival

2026-10-01 01:11 UTC

Also flies as

UA643

Distance flown

2253 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

41,025 ft

Max ground speed

510 kt

Tracked

2h 52m · 2,247 km

Altitude (ft, max 41,025)

Ground speed (kt, max 510)

Altitude (ft, max 41,025)

Ground speed (kt, max 510)

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 22:15 UTC	UAL643	SNA → IAH Santa Ana → Houston	N29717	Boeing 737-700	In progress	~2163 km est.
2026-10-02 17:13 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N17265	Boeing 737 MAX 8	Completed	757 km
2026-10-02 12:45 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N17401	Boeing 737 MAX 9	Completed	751 km
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
2026-09-29 17:33 UTC	UAL643	IAH → SNA Houston → Santa Ana	N24706	Boeing 737-700	Completed	2371 km
2026-09-29 17:13 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N37353	Boeing 737 MAX 8	Completed	743 km
2026-09-28 22:07 UTC	UAL643	SNA → IAH Santa Ana → Houston	N17753	Boeing 737-700	Completed (landing presumed)	2199 km
2026-09-28 17:45 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N17312	Boeing 737 MAX 8	Completed	753 km
2026-09-28 12:50 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N17595	Boeing 737 MAX 9	Completed	753 km
2026-09-27 22:22 UTC	UAL643	SNA → IAH Santa Ana → Houston	N14731	Boeing 737-700	Completed (landing presumed)	2205 km
2026-09-27 17:32 UTC	UAL643	IAH → SNA Houston → Santa Ana	N14731	Boeing 737-700	Completed	2215 km
2026-09-27 17:11 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N12238	Boeing 737-800	Completed	751 km
2026-09-27 12:52 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N27439	Boeing 737 MAX 9	Completed	751 km
2026-09-26 22:17 UTC	UAL643	SNA → IAH Santa Ana → Houston	N17262	Boeing 737 MAX 8	Completed (landing presumed)	2219 km
2026-09-26 17:39 UTC	UAL643	IAH → SNA Houston → Santa Ana	N17262	Boeing 737 MAX 8	Completed	2203 km
2026-09-26 17:18 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N27260	Boeing 737 MAX 8	Completed	736 km
2026-09-25 22:54 UTC	UAL643	SNA → IAH Santa Ana → Houston	N17373	Boeing 737 MAX 8	Completed (landing presumed)	2256 km
2026-09-25 17:39 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N17361	Boeing 737 MAX 8	Completed	763 km
2026-09-25 12:51 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N77585	Boeing 737 MAX 9	Completed	761 km
2026-09-24 23:00 UTC	UAL643	SNA → IAH Santa Ana → Houston	N27722	Boeing 737-700	Completed (landing presumed)	2235 km
2026-09-24 17:20 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N17321	Boeing 737 MAX 8	Completed	781 km
2026-09-24 12:57 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N77571	Boeing 737 MAX 9	Completed	732 km
2026-09-23 22:09 UTC	UAL643	SNA → IAH Santa Ana → Houston	N27255	Boeing 737 MAX 8	Completed (landing presumed)	2205 km
2026-09-23 17:35 UTC	UAL643	IAH → SNA Houston → Santa Ana	N27255	Boeing 737 MAX 8	Completed	2227 km
2026-09-23 13:02 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N17359	Boeing 737 MAX 8	Completed	737 km
2026-09-22 22:02 UTC	UAL643	SNA → IAH Santa Ana → Houston	N27271	Boeing 737 MAX 8	Completed (landing presumed)	2260 km
2026-09-22 19:33 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N47284	Boeing 737 MAX 8	Completed	740 km
2026-09-22 13:03 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N17317	Boeing 737 MAX 8	Completed	1188 km
2026-09-21 22:08 UTC	UAL643	SNA → IAH Santa Ana → Houston	N17285	Boeing 737 MAX 8	Completed (landing presumed)	2265 km
2026-09-21 17:23 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N17362	Boeing 737 MAX 8	Completed	808 km
2026-09-21 13:07 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N27287	Boeing 737 MAX 8	Completed	756 km
2026-09-20 22:12 UTC	UAL643	SNA → IAH Santa Ana → Houston	N17373	Boeing 737 MAX 8	Completed	2280 km
2026-09-20 17:18 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N27253	Boeing 737 MAX 8	Completed	789 km
2026-09-20 13:39 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N17300	Boeing 737 MAX 8	Completed	774 km
2026-09-19 22:40 UTC	UAL643	SNA → IAH Santa Ana → Houston	N47360	Boeing 737 MAX 8	Completed	2277 km
2026-09-19 17:31 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N27263	Boeing 737 MAX 8	Completed	773 km
2026-09-19 13:10 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N47281	Boeing 737 MAX 8	Completed	782 km
2026-09-18 22:09 UTC	UAL643	SNA → IAH Santa Ana → Houston	N17285	Boeing 737 MAX 8	Completed (landing presumed)	2310 km
2026-09-18 17:39 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N27269	Boeing 737 MAX 8	Completed	786 km
2026-09-18 13:07 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N37352	Boeing 737 MAX 8	Completed	797 km
2026-09-17 22:10 UTC	UAL643	SNA → IAH Santa Ana → Houston	N17314	Boeing 737 MAX 8	Completed	2316 km
2026-09-17 17:42 UTC	UAL643	SFO → SNA San Francisco → Santa Ana	N37305	Boeing 737 MAX 8	Completed	782 km
2026-09-17 13:11 UTC	UAL643	LAS → SFO Las Vegas → San Francisco	N17301	Boeing 737 MAX 8	Completed	796 km
2026-09-16 22:24 UTC	UAL643	SNA → IAH Santa Ana → Houston	N37324	Boeing 737 MAX 8	Completed	2507 km