STS (Santa Rosa) to SAN (San Diego) flights arrive on time 74% of the time. The most reliable airline on this route is Southwest Airlines at 85%. The average delay is 58 minutes. Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Source: Bureau of Transportation Statistics. Updated August 2026.STS → SAN
STS (Santa Rosa) to SAN (San Diego)
STS → SAN on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
This route is delayed fairly often. About 74% of flights arrive on schedule.
Delays on this route are most often caused by the airline (crew, maintenance, or boarding).
Accurate?
Southwest Airlines edges out SkyWest Airlines on this route — 85% vs 73% on time.
Airline Comparison
Southwest Airlines leads at 85% on time; SkyWest Airlines trails at 73%.
Accurate?
Good to know
Departing from STS
79% on timeExpect ~19 min sitting on the taxiway after your gate pushes back. STS has long runway queues.
TSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at SAN
77% on timeWhen flights into SAN are late, the average delay is 61 minutes. Build buffer if you have ground plans.
If connecting at SAN: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Southwest Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of STS? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
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Data last updated August 2026. Source: Bureau of Transportation Statistics.