DEN (Denver) to SAT (San Antonio) flights arrive on time 78% of the time. The most reliable airline on this route is United Airlines at 81%. 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 May 2026.DEN → SAT
DEN (Denver) to SAT (San Antonio)
DEN → SAT on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is on time most of the time. About 78% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines is significantly more reliable on this route at 81% on time vs SkyWest Airlines at 64%.
Airline Comparison
United Airlines leads at 81% on time; SkyWest Airlines trails at 64%.
Accurate?
Good to know
Departing from DEN
78% on timeExpect ~17 min sitting on the taxiway after your gate pushes back. DEN has long runway queues.
TSA is currently ~13 min. Best time: 4 AM (about 5 min).
Arriving at SAT
81% on timeWhen flights into SAT are late, the average delay is 67 minutes. Build buffer if you have ground plans.
If connecting at SAT: TSA is ~18 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated May 2026. Source: Bureau of Transportation Statistics.