DEN (Denver) to SAN (San Diego) flights arrive on time 76% of the time. The most reliable airline on this route is Alaska Airlines at 84%. The average delay is 57 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated October 2026.DEN → SAN
DEN (Denver) to SAN (San Diego)
DEN → SAN on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is on time most of the time. About 76% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Alaska Airlines edges out SkyWest Airlines on this route — 84% vs 72% on time.
Airline Comparison
Alaska Airlines leads at 84% on time; SkyWest Airlines trails at 72%.
Accurate?
Good to know
Departing from DEN
78% on timeExpect ~18 min sitting on the taxiway after your gate pushes back. DEN has long runway queues.
TSA is currently ~18 min. Best time: 4 AM (about 5 min).
Arriving at SAN
78% on timeWhen flights into SAN are late, the average delay is 60 minutes. Build buffer if you have ground plans.
If connecting at SAN: TSA is ~15 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Alaska Airlines owes you — refund rights, action plan, complaint email. Free.
Flying out of DEN? 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 October 2026. Source: Bureau of Transportation Statistics.