PWM (Portland) to ORD (Chicago) flights arrive on time 80% of the time. The most reliable airline on this route is Republic Airways at 88%. The average delay is 73 minutes. Delays on this route are most often caused by air traffic and busy airspace.
Source: Bureau of Transportation Statistics. Updated May 2026.PWM → ORD
PWM (Portland) to ORD (Chicago)
PWM → ORD on-time performance by month
24
25
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
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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 air traffic and busy airspace.
Accurate?
Republic Airways is significantly more reliable on this route at 88% on time vs Frontier Airlines at 49%.
Airline Comparison
Republic Airways leads at 88% on time; Frontier Airlines trails at 49%.
Accurate?
Good to know
Departing from PWM
81% on timeExpect ~18 min sitting on the taxiway after your gate pushes back. PWM has long runway queues.
TSA is currently ~11 min. Best time: 4 AM (about 5 min).
PWM cancels 2.8% of flights — higher than average. Have a backup plan.
Arriving at ORD
80% on timeWhen flights into ORD are late, the average delay is 76 minutes. Build buffer if you have ground plans.
If connecting at ORD: TSA is ~34 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.
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Data last updated May 2026. Source: Bureau of Transportation Statistics.