PHX (Phoenix) to STL (St. Louis) flights arrive on time 80% of the time. The most reliable airline on this route is null at 92%. The average delay is 55 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated October 2026.PHX → STL
PHX (Phoenix) to STL (St. Louis)
PHX → STL on-time performance by month
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This route is on time most of the time. About 80% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
null is significantly more reliable on this route at 92% on time vs Frontier Airlines at 69%.
Airline Comparison
leads at 92% on time; Frontier Airlines trails at 69%.
Accurate?
Good to know
Departing from PHX
81% on timeExpect ~16 min sitting on the taxiway after your gate pushes back. PHX has long runway queues.
TSA is currently ~20 min. Best time: 4 AM (about 5 min).
Arriving at STL
80% on timeWhen flights into STL are late, the average delay is 64 minutes. Build buffer if you have ground plans.
If connecting at STL: TSA is ~30 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
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Flying out of PHX? We'll brief you.
Delays, TSA, weather, gates — we'll let you know if something matters.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.