San Francisco, CA → Seattle, WA flight delays
SFO → SEA · all airlines · 496 flights · April 2026 · source: US BTS
This route is delayed
30%of the time, by +53 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
70%
Delayed 3h+
1.4%
Cancelled
0%
Avg when late
+53m
Best & worst day to fly
Most on-time
Saturday
delayed 17%
Worst
Monday
delayed 51%
Which airline is most punctual on SFO → SEA?
Deltadelayed 15%
Uniteddelayed 18%
Alaskadelayed 38%
SkyWestdelayed 52%
Frequently asked
How often is the San Francisco, CA to Seattle, WA flight delayed?
About 30% of SFO → SEA flights arrive late (15+ minutes), by an average of 53 minutes when they do, based on 496 flights in April 2026.
Which airline is most punctual on SFO → SEA?
Delta, delayed 15% of the time — the best of the 4 airlines flying this route.
What is the best day to fly SFO → SEA?
Saturday is the most on-time (delayed 17%), while Monday is the worst (delayed 51%).
Airport overviews