Historical on-time performance
Portland to Washington
Flights on PWM–IAD arrive on time 82% of the time over the last 12 months.
based on 646 flights over the last 12 months. On-time means arriving within 15 minutes (BTS standard).
By airline
How each carrier compares
- Republic AirwaysOn-time82%Medianon timep9030 minCancel2.2%Flights646
Why flights run late
Delay causes
- Airline12%
- Weather7%
- Air traffic (NAS)32%
- Late aircraft48%
- Security0%
Most delay minutes here are attributed to Late aircraft.
When flights don't go
Why flights were cancelled
- Airline0%
- Weather36%
- Air traffic (NAS)64%
- Security0%
Most cancellations here are attributed to Air traffic (NAS). Shares are among 14 cancellations with a reported cause (BTS reports causes from June 2003).
Over time
On-time trend
By season
On-time rate by month
When to fly
Best time to fly PWM → IAD
All airlines · rolling 36 months (2023-06 .. 2026-05).
Best time of day
On-time rates are fairly even by time of day on this route — ranging from 77% to 93% on time.
- Mornings93% on time · p90 5 min · 779 flights
- Middays91% on time · p90 5 min · 132 flights · limited
- Evenings81% on time · p90 35 min · 527 flights
- Afternoons77% on time · p90 50 min · 538 flights
Best day of week
On-time rates are fairly even by day on this route — ranging from 81% to 88% on time.
- Fridays88% on time · p90 15 min · 299 flights
- Saturdays87% on time · p90 20 min · 267 flights
- Wednesdays86% on time · p90 20 min · 278 flights
- Tuesdays86% on time · p90 15 min · 277 flights
- Thursdays84% on time · p90 25 min · 293 flights
- Sundays83% on time · p90 30 min · 276 flights
- Mondays81% on time · p90 30 min · 286 flights
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