SAN (San Diego) to SEA (Seattle) flights arrive on time 81% of the time. The most reliable airline on this route is Delta Air Lines at 86%. The average delay is 67 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated July 2026.SAN → SEA
SAN (San Diego) to SEA (Seattle)
SAN → SEA on-time performance by month
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This route is on time most of the time. About 81% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Delta Air Lines is significantly more reliable on this route at 86% on time vs Southwest Airlines at 65%.
Airline Comparison
Delta Air Lines leads at 86% on time; Southwest Airlines trails at 65%.
Accurate?
Good to know
Departing from SAN
77% on timeExpect ~20 min sitting on the taxiway after your gate pushes back. SAN has long runway queues.
TSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at SEA
80% on timeWhen flights into SEA are late, the average delay is 57 minutes. Build buffer if you have ground plans.
If connecting at SEA: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Delta Air Lines owes you — refund rights, action plan, complaint email. Free.
Flying out of SAN? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
Know someone flying soon?
Send them the link — delay data, TSA waits, weather, all free.
Data last updated July 2026. Source: Bureau of Transportation Statistics.