Seattle, WA → San Diego, CA flight delays
SEA → SAN · all airlines · 409 flights · April 2026 · source: US BTS
This route is delayed
12%of the time, by +42 min on average when it does.
This is history, not a promise — your specific flight could well be on time.
On-time rate
88%
Delayed 3h+
0.2%
Cancelled
0%
Avg when late
+42m
Best & worst day to fly
Most on-time
Saturday
delayed 7%
Worst
Thursday
delayed 16%
Which airline is most punctual on SEA → SAN?
Alaskadelayed 9%
Deltadelayed 12%
Southwestdelayed 37%
Frequently asked
How often is the Seattle, WA to San Diego, CA flight delayed?
About 12% of SEA → SAN flights arrive late (15+ minutes), by an average of 42 minutes when they do, based on 409 flights in April 2026.
Which airline is most punctual on SEA → SAN?
Alaska, delayed 9% of the time — the best of the 3 airlines flying this route.
What is the best day to fly SEA → SAN?
Saturday is the most on-time (delayed 7%), while Thursday is the worst (delayed 16%).
Airport overviews