IAD (Washington) to PWM (Portland) flights arrive on time 87% of the time. The most reliable airline on this route is United Airlines at 90%. The average delay is 74 minutes. Delays on this route are most often caused by the incoming plane arriving late.
Source: Bureau of Transportation Statistics. Updated March 2026.IAD → PWM
IAD (Washington) to PWM (Portland)
IAD → PWM on-time performance by month
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This route is usually on time. About 87% of flights arrive on schedule.
Delays on this route are most often caused by the incoming plane arriving late.
Accurate?
Airlines are roughly equal on this route — United Airlines leads slightly at 90% vs Republic Airways at 88%.
Airline Comparison
United Airlines leads at 90% on time; Republic Airways trails at 88%.
Accurate?
Good to know
Departing from IAD
83% on timeExpect ~19 min sitting on the taxiway after your gate pushes back. IAD has long runway queues.
TSA is currently ~5 min. Best time: 4 AM (about 5 min).
Arriving at PWM
81% on timeWhen flights into PWM are late, the average delay is 76 minutes. Build buffer if you have ground plans.
If connecting at PWM: TSA is ~21 min right now. Allow at least 60 minutes for a domestic connection.
PWM has a 2.8% 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.
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Data last updated March 2026. Source: Bureau of Transportation Statistics.