ORD (Chicago) to PHL (Philadelphia) flights arrive on time 73% of the time. The most reliable airline on this route is United Airlines at 76%. The average delay is 88 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated April 2026.ORD → PHL
ORD (Chicago) to PHL (Philadelphia)
ORD → PHL on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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This route is delayed fairly often. About 73% 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 76% on time vs Frontier Airlines at 59%.
Airline Comparison
United Airlines leads at 76% on time; Frontier Airlines trails at 59%.
Accurate?
Good to know
Departing from ORD
80% on timeExpect ~20 min sitting on the taxiway after your gate pushes back. ORD has long runway queues.
TSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at PHL
79% on timeWhen flights into PHL are late, the average delay is 79 minutes. Build buffer if you have ground plans.
If connecting at PHL: TSA is ~5 min right now. Allow at least 60 minutes for a domestic connection.
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Data last updated April 2026. Source: Bureau of Transportation Statistics.