YAFT.LIVE

UAL2831

SEA → SFO · Airbus A320 233 · United Airlines

Flight

Status
Completed
Arrival confirmed via
ADS-B (ground reading)
Departure
Seattle Tacoma International Airport (SEA) — Seattle, United States
Departed
2026-09-09 16:35 UTC
Arrival
San Francisco International Airport (SFO) — San Francisco, United States
Distance flown
1333 km
Straight-line distance
1093 km
Approach distance
66 km

Aircraft

Registration
Type
Airbus A320 233
Seats
150 total (96 Economy, 42 Economy Plus, 12 First)

Altitude & speed

Max altitude
35,050 ft
Max ground speed
493 kt
Tracked
1h 48m · 1,265 km
Altitude (ft, max 35,050)
018,92737,8540m30m1h 0m1h 30m
Ground speed (kt, max 493)
02665320m30m1h 0m1h 30m
Altitude (ft, max 35,050)
018,92737,8540m1h 0m
Ground speed (kt, max 493)
02665320m1h 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
2026-10-02 21:38 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N4901U Airbus A320 233 Completed 1210 km
2026-10-01 21:53 UTC UAL2831 SFO → IAH
San Francisco → Houston
N17456 Boeing 737 MAX 9 Completed (landing confirmed by airport data) 3486 km
2026-10-01 17:29 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N4901U Airbus A320 233 Completed 1247 km
2026-09-30 21:17 UTC UAL2831 SFO → IAH
San Francisco → Houston
N77590 Boeing 737 MAX 9 Completed (landing confirmed by airport data) 2781 km
2026-09-30 16:23 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N439UA Airbus A320 233 Completed 1244 km
2026-09-29 21:43 UTC UAL2831 SFO → IAH
San Francisco → Houston
N27586 Boeing 737 MAX 9 Incomplete (signal lost) 2760 km
2026-09-29 16:38 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N465UA Airbus A320 233 Completed 1235 km
2026-09-28 22:16 UTC UAL2831 SFO → IAH
San Francisco → Houston
N17454 Boeing 737 MAX 9 Completed (landing presumed) 2761 km
2026-09-28 16:52 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N435UA Airbus A320 233 Completed 1210 km
2026-09-27 22:10 UTC UAL2831 SFO → IAH
San Francisco → Houston
N37447 Boeing 737 MAX 9 Completed (landing presumed) 2768 km
2026-09-27 18:08 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N837UA Airbus A319 Completed 1231 km
2026-09-26 21:56 UTC UAL2831 SFO → IAH
San Francisco → Houston
N57478 Boeing 737 MAX 9 Completed (landing presumed) 2767 km
2026-09-26 17:10 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N443UA Airbus A320 233 Completed 1230 km
2026-09-25 21:46 UTC UAL2831 SFO → IAH
San Francisco → Houston
N27474 Boeing 737 MAX 9 Completed (landing presumed) 2787 km
2026-09-25 17:40 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N446UA Airbus A320 233 Completed 1318 km
2026-09-24 22:14 UTC UAL2831 SFO → IAH
San Francisco → Houston
N57478 Boeing 737 MAX 9 Completed (landing presumed) 2813 km
2026-09-24 16:24 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N443UA Airbus A320 233 Completed 1246 km
2026-09-23 21:43 UTC UAL2831 SFO → IAH
San Francisco → Houston
N27515 Boeing 737 MAX 9 Completed (landing presumed) 2746 km
2026-09-23 16:31 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N464UA Airbus A320 233 Completed 1223 km
2026-09-22 22:11 UTC UAL2831 SFO → IAH
San Francisco → Houston
N37450 Boeing 737 MAX 9 Completed (landing presumed) 2742 km
2026-09-22 18:07 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N444UA Airbus A320 233 Completed 1288 km
2026-09-21 21:37 UTC UAL2831 SFO → IAH
San Francisco → Houston
N17421 Boeing 737 MAX 9 Incomplete (signal lost) 2868 km
2026-09-21 17:22 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N455UA Airbus A320 233 Completed 1342 km
2026-09-20 22:34 UTC UAL2831 SFO → IAH
San Francisco → Houston
N37513 Boeing 737 MAX 9 Completed 2765 km
2026-09-20 17:59 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N464UA Airbus A320 233 Completed 1367 km
2026-09-19 22:25 UTC UAL2831 SFO → IAH
San Francisco → Houston
N17550 Boeing 737 MAX 9 Incomplete (signal lost) 2890 km
2026-09-19 17:03 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N448UA Airbus A320 233 Completed 1340 km
2026-09-18 21:41 UTC UAL2831 SFO → IAH
San Francisco → Houston
N27439 Boeing 737 MAX 9 Completed 2899 km
2026-09-18 18:03 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N448UA Airbus A320 233 Completed 1326 km
2026-09-17 21:55 UTC UAL2831 SFO → IAH
San Francisco → Houston
N17408 Boeing 737 MAX 9 Completed (landing presumed) 2919 km
2026-09-17 17:02 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N1902U Airbus A320 233 Completed 1312 km
2026-09-16 21:25 UTC UAL2831 SFO → IAH
San Francisco → Houston
N37556 Boeing 737 MAX 9 Completed (landing presumed) 2930 km
2026-09-16 16:28 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N467UA Airbus A320 233 Completed 1336 km
2026-09-15 21:19 UTC UAL2831 SFO → IAH
San Francisco → Houston
N17421 Boeing 737 MAX 9 Completed 2902 km
2026-09-15 16:36 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N447UA Airbus A320 233 Completed 1446 km
2026-09-14 22:34 UTC UAL2831 SFO → IAH
San Francisco → Houston
N27476 Boeing 737 MAX 9 Completed 2957 km
2026-09-14 18:36 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N496UA Airbus A320 233 Completed 1313 km
2026-09-13 21:25 UTC UAL2831 SFO → IAH
San Francisco → Houston
N17422 Boeing 737 MAX 9 Completed (landing presumed) 2949 km
2026-09-13 16:53 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N487UA Airbus A320 233 Completed 1319 km
2026-09-12 21:13 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N14567 Airbus A321 Neo Completed 1289 km
2026-09-11 21:19 UTC UAL2831 SFO → IAH
San Francisco → Houston
N17417 Boeing 737 MAX 9 Completed (landing presumed) 3030 km
2026-09-11 18:36 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N454UA Airbus A320 233 Completed 1301 km
2026-09-10 21:22 UTC UAL2831 SFO → IAH
San Francisco → Houston
N47412 Boeing 737 MAX 9 Completed (landing presumed) 3062 km
2026-09-10 16:25 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N490UA Airbus A320 233 Completed 1361 km
2026-09-09 21:24 UTC UAL2831 SFO → IAH
San Francisco → Houston
N37450 Boeing 737 MAX 9 Completed (landing presumed) 2865 km
2026-09-09 16:35 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N457UA Airbus A320 233 Completed 1333 km
2026-09-07 21:39 UTC UAL2831 SFO → IAH
San Francisco → Houston
N27520 Boeing 737 MAX 9 Completed 2898 km
2026-09-07 17:05 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N481UA Airbus A320 233 Completed 1322 km
2026-09-06 21:41 UTC UAL2831 SFO → IAH
San Francisco → Houston
N77588 Boeing 737 MAX 9 Completed (landing presumed) 2963 km
2026-09-06 16:47 UTC UAL2831 SEA → SFO
Seattle → San Francisco
N466UA Airbus A320 233 Completed 1304 km

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