UA2831 · SEA → SFO

United Airlines · Seattle to San Francisco · last 12 months · 103 flights tracked

29.7%on-time

UA2831 SEA→SFO: 29.7% on-time over 103 flights (last 12 months) — below average. It trails the route average (59.8%) by 30.1 points. Best day to fly: Sat (40.0%); worst: Thu (14.3%). Seasonality matters: Jul is the most reliable month (41.9%), Aug the worst (22.6%). Cancellation rate is 1.9% — have a backup plan. Average arrival delay: 56.0 minutes.

Data: US BTS, last 12 months.

56.0 minavg arrival delay

1.9%cancelled

0diverted

103flights tracked

Arrival delay distribution

Early/on time · 101–60 min · 6961–180 min · 16180+ min · 6

On-time by day of week

Mon

21.4%

Tue

35.7%

Wed

21.4%

Thu

14.3%

Fri

33.3%

Sat

40.0%

Sun

40.0%

On-time by month

30.0%

May

24.1%

Jun

41.9%

Jul

22.6%

Aug

← All flights on SEA–SFO