Seattle, WA → San Francisco, CA flight delays
SEA → SFO · all airlines · 591 flights · May 2026 · source: US BTS
This route is delayed
59%of the time, by +54 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
41%
Delayed 3h+
1.2%
Cancelled
1.4%
Avg when late
+54m
Best & worst day to fly
Most on-time
Saturday
delayed 38%
Worst
Thursday
delayed 73%
Which airline is most punctual on SEA → SFO?
SkyWestdelayed 43%
Deltadelayed 51%
Uniteddelayed 65%
Alaskadelayed 65%
Frequently asked
How often is the Seattle, WA to San Francisco, CA flight delayed?
About 59% of SEA → SFO flights arrive late (15+ minutes), by an average of 54 minutes when they do, based on 591 flights in May 2026.
Which airline is most punctual on SEA → SFO?
SkyWest, delayed 43% of the time — the best of the 4 airlines flying this route.
What is the best day to fly SEA → SFO?
Saturday is the most on-time (delayed 38%), while Thursday is the worst (delayed 73%).
Airport overviews