UAL1660

Flight

Status

Incomplete (signal lost)

Departure

Seattle Tacoma International Airport (SEA) — Seattle, United States

Est. departure time

2026-09-04 01:10 UTC (approx.)

Arrival

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

Distance flown

3276 km

Straight-line distance

3013 km

Aircraft

Registration

N39423

Type

Boeing 737-900

Seats

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

Altitude & speed

Max altitude

35,025 ft

Max ground speed

488 kt

Tracked

4h 10m · 3,188 km

Altitude (ft, max 35,025)

Ground speed (kt, max 488)

Altitude (ft, max 35,025)

Ground speed (kt, max 488)

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
2026-10-03 23:57 UTC	UAL1660	SEA → IAH Seattle → Houston	N27464	Boeing 737 MAX 9	Completed (landing confirmed by airport data)	3115 km
2026-10-03 18:34 UTC	UAL1660	ORD → SEA Chicago → Seattle	N73256	Boeing 737-800	Completed	2890 km
2026-10-02 23:53 UTC	UAL1660	SEA → IAH Seattle → Houston	N37504	Boeing 737 MAX 9	Completed (landing confirmed by airport data)	3069 km
2026-10-02 18:58 UTC	UAL1660	ORD → SEA Chicago → Seattle	N77542	Boeing 737-800	Completed	2877 km
2026-10-02 00:08 UTC	UAL1660	SEA → IAH Seattle → Houston	N17458	Boeing 737 MAX 9	Completed (landing confirmed by airport data)	3545 km
2026-10-01 18:28 UTC	UAL1660	ORD → SEA Chicago → Seattle	N37263	Boeing 737-800	Completed	2891 km
2026-09-30 23:59 UTC	UAL1660	SEA → IAH Seattle → Houston	N37450	Boeing 737 MAX 9	Completed (landing confirmed by airport data)	3366 km
2026-09-30 18:50 UTC	UAL1660	ORD → SEA Chicago → Seattle	N18223	Boeing 737-800	Completed	2903 km
2026-09-30 14:27 UTC	UAL1660	DCA → ORD Washington → Chicago	N18223	Boeing 737-800	Completed	1148 km
2026-09-29 21:19 UTC	UAL1660	ORD → SEA Chicago → Seattle	N73276	Boeing 737-800	Completed	2911 km
2026-09-28 23:56 UTC	UAL1660	SEA → IAH Seattle → Houston	N77598	Boeing 737 MAX 9	Completed (landing presumed)	3078 km
2026-09-28 18:38 UTC	UAL1660	ORD → SEA Chicago → Seattle	N12218	Boeing 737-800	Completed	2943 km
2026-09-27 20:09 UTC	UAL1660	ORD → SEA Chicago → Seattle	N75428	Boeing 737-900	Completed	2925 km
2026-09-27 00:14 UTC	UAL1660	SEA → IAH Seattle → Houston	N37508	Boeing 737 MAX 9	Incomplete (signal lost)	3103 km
2026-09-26 18:59 UTC	UAL1660	ORD → SEA Chicago → Seattle	N16234	Boeing 737-800	Completed	2922 km
2026-09-25 23:59 UTC	UAL1660	SEA → IAH Seattle → Houston	N17408	Boeing 737 MAX 9	Completed (landing presumed)	3193 km
2026-09-25 18:34 UTC	UAL1660	ORD → SEA Chicago → Seattle	N437UA	Airbus A320 233	Completed	2855 km
2026-09-25 00:02 UTC	UAL1660	SEA → IAH Seattle → Houston	N37560	Boeing 737 MAX 9	Completed	3102 km
2026-09-24 18:35 UTC	UAL1660	ORD → SEA Chicago → Seattle	N47281	Boeing 737 MAX 8	Completed	2972 km
2026-09-23 23:57 UTC	UAL1660	SEA → IAH Seattle → Houston	N27477	Boeing 737-900	Completed (landing presumed)	3160 km
2026-09-23 18:55 UTC	UAL1660	ORD → SEA Chicago → Seattle	N75435	Boeing 737-900	Completed	2864 km
2026-09-22 23:58 UTC	UAL1660	SEA → IAH Seattle → Houston	N17596	Boeing 737 MAX 9	Incomplete (signal lost)	3120 km
2026-09-22 18:56 UTC	UAL1660	ORD → SEA Chicago → Seattle	N39418	Boeing 737-900	Completed	2849 km
2026-09-22 01:00 UTC	UAL1660	SEA → IAH Seattle → Houston	N75429	Boeing 737-900	Completed	3071 km
2026-09-21 18:56 UTC	UAL1660	ORD → SEA Chicago → Seattle	N75433	Boeing 737-900	Completed	2902 km
2026-09-21 14:40 UTC	UAL1660	AUS → ORD Austin → Chicago	N75433	Boeing 737-900	Completed	1687 km
2026-09-20 19:34 UTC	UAL1660	ORD → SEA Chicago → Seattle	N881UA	Airbus A319	Completed	2914 km
2026-09-20 17:15 UTC	UAL1660	DSM → ORD Des Moines → Chicago	N881UA	Airbus A319	Completed	565 km
2026-09-19 19:55 UTC	UAL1660	ORD → SEA Chicago → Seattle	N25201	Boeing 737-800	Completed	2982 km
2026-09-19 00:43 UTC	UAL1660	SEA → IAH Seattle → Houston	N38446	Boeing 737-900	Incomplete (signal lost)	3176 km
2026-09-18 18:34 UTC	UAL1660	ORD → SEA Chicago → Seattle	N45440	Boeing 737-900	Completed	2988 km
2026-09-18 01:26 UTC	UAL1660	SEA → IAH Seattle → Houston	N37413	Boeing 737-900	Completed	3240 km
2026-09-17 20:02 UTC	UAL1660	ORD → SEA Chicago → Seattle	N64809	Boeing 737-900	Completed	3020 km
2026-09-16 18:53 UTC	UAL1660	ORD → SEA Chicago → Seattle	N75432	Boeing 737-900	Completed	3073 km
2026-09-15 20:09 UTC	UAL1660	ORD → SEA Chicago → Seattle	N64809	Boeing 737-900	Completed	3038 km
2026-09-14 19:17 UTC	UAL1660	ORD → SEA Chicago → Seattle	N39463	Boeing 737-900	Completed	3153 km
2026-09-13 23:58 UTC	UAL1660	SEA → IAH Seattle → Houston	N37434	Boeing 737-900	Completed	3270 km
2026-09-13 18:29 UTC	UAL1660	ORD → SEA Chicago → Seattle	N37413	Boeing 737-900	Completed	3032 km
2026-09-12 19:28 UTC	UAL1660	ORD → SEA Chicago → Seattle	N78285	Boeing 737-800	Completed	3023 km
2026-09-11 23:59 UTC	UAL1660	SEA → IAH Seattle → Houston	N69839	Boeing 737-900	Incomplete (signal lost)	3287 km
2026-09-11 18:41 UTC	UAL1660	ORD → SEA Chicago → Seattle	N69824	Boeing 737-900	Completed	3018 km
2026-09-10 18:54 UTC	UAL1660	ORD → SEA Chicago → Seattle	N62884	Boeing 737-900	Completed	3113 km
2026-09-09 23:56 UTC	UAL1660	SEA → IAH Seattle → Houston	N63820	Boeing 737-900	Incomplete (signal lost)	3336 km
2026-09-09 18:56 UTC	UAL1660	ORD → SEA Chicago → Seattle	N67812	Boeing 737-900	Completed	3023 km
2026-09-08 00:14 UTC	UAL1660	SEA → IAH Seattle → Houston	N69804	Boeing 737-900	Completed	3255 km
2026-09-07 00:08 UTC	UAL1660	SEA → IAH Seattle → Houston	N17336	Boeing 737 MAX 8	Incomplete (signal lost)	3267 km
2026-09-06 00:15 UTC	UAL1660	SEA → IAH Seattle → Houston	N17423	Boeing 737 MAX 9	Incomplete (signal lost)	3292 km
2026-09-05 00:16 UTC	UAL1660	SEA → IAH Seattle → Houston	N37474	Boeing 737-900	Completed	3180 km
2026-09-04 01:29 UTC	UAL1660	SEA → IAH Seattle → Houston	N39423	Boeing 737-900	Incomplete (signal lost)	3276 km
2026-09-03 00:16 UTC	UAL1660	SEA → IAH Seattle → Houston	N57286	Boeing 737 MAX 8	Completed	3358 km