Seattle, WA → San Francisco, CA flight delays
SEA → SFO · all airlines · 495 flights · April 2026 · source: US BTS
This route is delayed
52%of the time, by +49 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
48%
Delayed 3h+
1.2%
Cancelled
0%
Avg when late
+49m
Best & worst day to fly
Most on-time
Tuesday
delayed 32%
Worst
Monday
delayed 71%
Which airline is most punctual on SEA → SFO?
Deltadelayed 29%
SkyWestdelayed 44%
Alaskadelayed 55%
Uniteddelayed 62%
Frequently asked
How often is the Seattle, WA to San Francisco, CA flight delayed?
About 52% of SEA → SFO flights arrive late (15+ minutes), by an average of 49 minutes when they do, based on 495 flights in April 2026.
Which airline is most punctual on SEA → SFO?
Delta, delayed 29% of the time — the best of the 4 airlines flying this route.
What is the best day to fly SEA → SFO?
Tuesday is the most on-time (delayed 32%), while Monday is the worst (delayed 71%).
Airport overviews