UAL1523

For travellers

Departure · Seattle (SEA)

Gate B9

Scheduled 30 Sep 08:25

Board status: Departed

Airborne since 30 Sep 08:39 (ADS-B)

Arrival · Washington, DC (IAD)

Gate D20 · Baggage belt 3

Scheduled 30 Sep 16:31 · Landed 30 Sep 16:01 · early

Board status: InGate

Landed 30 Sep 16:04 (airport data)

Board data from mwaa, sea, updated 2130 min ago; times local to each airport.

Flight

Status

Completed (landing confirmed by airport data)

Arrival confirmed via

Airport data (confirmed)

Departure

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

Scheduled departure

2026-09-30 15:25 UTC

Departed

2026-09-30 15:39 UTC

Arrival

Washington Dulles International Airport (IAD) — Washington, DC, United States

Scheduled arrival

2026-09-30 20:31 UTC

Estimated arrival

2026-09-30 19:57 UTC

Also flies as

UA1523

Codeshares

ET1369, LH7485, OS7908, SN8850

Distance flown

3850 km

Straight-line distance

3702 km

Aircraft

Registration

N77582

Type

Boeing 737 MAX 9

Seats

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

CO2 (EMEP est., total)

75.2 t (534 kg/pax Business, 407 kg/pax Economy)

Altitude & speed

Max altitude

35,050 ft

Max ground speed

560 kt

Tracked

4h 22m · 3,833 km

Altitude (ft, max 35,050)

Ground speed (kt, max 560)

Altitude (ft, max 35,050)

Ground speed (kt, max 560)

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
2026-10-01 15:42 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N57480	Boeing 737 MAX 9	Completed	3851 km
2026-09-30 15:39 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N77582	Boeing 737 MAX 9	Completed (landing confirmed by airport data)	3850 km
2026-09-29 15:33 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17441	Boeing 737 MAX 9	Completed	3832 km
2026-09-28 15:42 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N37540	Boeing 737 MAX 9	Completed	3855 km
2026-09-27 15:55 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17593	Boeing 737 MAX 9	Completed	3877 km
2026-09-26 15:43 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17441	Boeing 737 MAX 9	Completed	3805 km
2026-09-25 15:40 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17427	Boeing 737 MAX 9	Completed	3941 km
2026-09-24 15:56 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N47453	Boeing 737 MAX 9	Completed	3825 km
2026-09-23 15:24 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17468	Boeing 737 MAX 9	Completed	3897 km
2026-09-22 16:09 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17401	Boeing 737 MAX 9	Completed	3939 km
2026-09-21 15:18 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N77471	Boeing 737 MAX 9	Completed	3866 km
2026-09-20 15:16 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N37551	Boeing 737 MAX 9	Completed	3957 km
2026-09-19 15:23 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N77585	Boeing 737 MAX 9	Completed	4169 km
2026-09-18 15:22 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N37542	Boeing 737 MAX 9	Completed	4191 km
2026-09-17 15:24 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17459	Boeing 737 MAX 9	Completed	4151 km
2026-09-16 15:22 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N47345	Boeing 737 MAX 8	Completed	4008 km
2026-09-15 15:19 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N77544	Boeing 737 MAX 9	Completed	4214 km
2026-09-14 15:33 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N37504	Boeing 737 MAX 9	Completed	4092 km
2026-09-13 15:16 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17465	Boeing 737 MAX 9	Completed	4011 km
2026-09-12 15:25 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N27474	Boeing 737 MAX 9	Completed	4044 km
2026-09-11 15:23 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N37502	Boeing 737 MAX 9	Completed	4077 km
2026-09-10 15:28 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N37548	Boeing 737 MAX 9	Completed	4097 km
2026-09-09 15:23 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N77590	Boeing 737 MAX 9	Completed	4025 km
2026-09-07 15:22 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17317	Boeing 737 MAX 8	Completed	4046 km
2026-09-06 15:22 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N77598	Boeing 737 MAX 9	Completed	3985 km
2026-09-05 15:23 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N27463	Boeing 737 MAX 9	Completed	4014 km
2026-09-04 15:20 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17437	Boeing 737 MAX 9	Completed	4514 km
2026-09-03 15:28 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17418	Boeing 737 MAX 9	Completed	4049 km
2026-09-02 15:34 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17428	Boeing 737 MAX 9	Completed	4563 km
2026-09-01 15:21 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N27439	Boeing 737 MAX 9	Completed	4036 km
2026-08-31 15:59 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N77552	Boeing 737 MAX 9	Completed	4094 km
2026-08-30 15:20 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17444	Boeing 737 MAX 9	Completed	4197 km
2026-08-29 15:31 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17444	Boeing 737 MAX 9	Completed	4068 km
2026-08-28 15:29 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17565	Boeing 737 MAX 9	Completed	3997 km
2026-08-27 16:07 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N57416	Boeing 737 MAX 9	Completed	4003 km
2026-08-26 15:18 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N97424	Boeing 737 MAX 9	Completed	4056 km
2026-08-25 15:19 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17443	Boeing 737 MAX 9	Completed	4024 km
2026-08-24 15:52 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N37534	Boeing 737 MAX 9	Completed	4061 km
2026-08-23 15:21 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N47453	Boeing 737 MAX 9	Completed	4017 km
2026-08-22 15:29 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17452	Boeing 737 MAX 9	Completed	5878 km
2026-08-21 15:46 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17564	Boeing 737 MAX 9	Completed	5138 km
2026-08-20 15:34 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N47446	Boeing 737 MAX 9	Completed	8739 km
2026-08-19 15:26 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17459	Boeing 737 MAX 9	Completed	7787 km
2026-08-18 15:33 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N37545	Boeing 737 MAX 9	Completed	9732 km
2026-08-17 15:21 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17421	Boeing 737 MAX 9	Completed	5545 km
2026-08-16 15:11 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N37440	Boeing 737 MAX 9	Completed	5308 km
2026-08-15 15:04 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N34282	Boeing 737-800	Completed	~9071 km est. (5325 km recorded)
2026-08-14 15:22 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N17432	Boeing 737 MAX 9	Completed	5139 km
2026-08-12 15:19 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N27546	Boeing 737 MAX 9	Completed	5552 km
2026-08-11 15:32 UTC	UAL1523	SEA → IAD Seattle → Washington, DC	N77571	Boeing 737 MAX 9	Completed	5313 km