PHL (Philadelphia) to STL (St. Louis) flights arrive on time 78% of the time. The most reliable airline on this route is Republic Airways at 85%. The average delay is 72 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated August 2026.PHL → STL
PHL (Philadelphia) to STL (St. Louis)
PHL → STL on-time performance by month
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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?
Republic Airways is significantly more reliable on this route at 85% on time vs Frontier Airlines at 54%.
Airline Comparison
Republic Airways leads at 85% on time; Frontier Airlines trails at 54%.
Accurate?
Good to know
Departing from PHL
77% on timeExpect ~20 min sitting on the taxiway after your gate pushes back. PHL has long runway queues.
TSA is currently ~22 min. Best time: 4 AM (about 5 min).
PHL cancels 2.4% of flights — higher than average. Have a backup plan.
Arriving at STL
81% on timeWhen flights into STL are late, the average delay is 66 minutes. Build buffer if you have ground plans.
If connecting at STL: TSA is ~23 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
Check what Republic Airways owes you — refund rights, action plan, complaint email. Free.
Flying out of PHL? 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 August 2026. Source: Bureau of Transportation Statistics.