UA2831 · UAL2831

UAL2831 over the last 30 days

As of 2026-10-27

UAL2831 is operated by United Airlines on the route Seattle–Tacoma International Airport (SEA/KSEA) → San Francisco International Airport (SFO/KSFO). It usually takes off around 16:46 UTC (09:46 local time, SEA). It usually lands around 18:24 UTC (11:24 local time, SFO). Most frequent aircraft type: BOEING 737 MAX 9 (B39M).

Days with an observed flight (last 30 days)

29/30

Days of the week with an observed flight

Mon, Tue, Wed, Thu, Fri, Sat, Sun

Typical take-off

16:46 UTC · 09:46 local time (SEA)

Typical landing

18:24 UTC · 11:24 local time (SFO)

Typical time airborne

101 min

Median departure deviation from the usual time on this route

+6 min

Departures within 15 minutes of the usual time

64 %

Departures measured

88

Our measurement against the usual departure time of the route, from our own observations over the last 28 days; the figures cover all flights of this airline on the route.

Aircraft types on this flight (last 30 days)

• BOEING 737 MAX 9 (B39M) — Number of flights: 40
• AIRBUS A-320 (A320) — Number of flights: 26
• BOEING 777-200 (B772) — Number of flights: 4

Aircraft in the last 7 days

• N213UA · BOEING 777-200 2026-10-27
• N47284 · BOEING 737 MAX 8 2026-10-27
• N769UA · BOEING 777-200 2026-10-27
• N28457 · BOEING 737-900 2026-10-26
• N17436 · BOEING 737 MAX 9 2026-10-24
• N430UA · AIRBUS A-320 2026-10-24

Related flights on this route

• All flights KSEA – KSFO