DEN (Denver) to PHL (Philadelphia) flights arrive on time 75% of the time. The most reliable airline on this route is United Airlines at 81%. The average delay is 73 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated July 2026.DEN → PHL
DEN (Denver) to PHL (Philadelphia)
DEN → PHL on-time performance by month
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This route is delayed fairly often. About 75% 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 Frontier Airlines at 61%.
Airline Comparison
United Airlines leads at 81% on time; Frontier Airlines trails at 61%.
Accurate?
Good to know
Departing from DEN
79% on timeExpect ~19 min sitting on the taxiway after your gate pushes back. DEN has long runway queues.
TSA is currently ~9 min. Best time: 4 AM (about 5 min).
Arriving at PHL
77% on timeWhen flights into PHL are late, the average delay is 84 minutes. Build buffer if you have ground plans.
If connecting at PHL: TSA is ~7 min right now. Allow at least 60 minutes for a domestic connection.
PHL has a 2.4% cancellation rate — keep the airline app handy for rebooking.
Flight cancelled or delayed?
Check what United 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 July 2026. Source: Bureau of Transportation Statistics.