PWM (Portland) to IAD (Washington) flights arrive on time 88% of the time. The most reliable airline on this route is United Airlines at 97%. The average delay is 65 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated May 2026.PWM → IAD
PWM (Portland) to IAD (Washington)
PWM → IAD on-time performance by month
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JanFebMarAprMayJunJulAugSepOctNovDec
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This route is usually on time. About 88% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
United Airlines edges out Republic Airways on this route — 97% vs 89% on time.
Airline Comparison
United Airlines leads at 97% on time; Republic Airways trails at 89%.
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 IAD
83% on timeWhen flights into IAD are late, the average delay is 74 minutes. Build buffer if you have ground plans.
If connecting at IAD: TSA is ~8 min right now. Allow at least 60 minutes for a domestic connection.
Flight cancelled or delayed?
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Data last updated May 2026. Source: Bureau of Transportation Statistics.