Portland (PDX) to Washington (IAD): On-Time Performance
Data through July 2026
Portland (PDX) to Washington (IAD) is a thinner route than most in this dataset — 291 departures over the past year, roughly 6 a week — so treat these numbers as indicative rather than definitive. Of the flights that did operate, 91% arrived on time, comfortably above the national average of 78%.
- On-time
- 91%
- arrived <15 min late
- Avg delay
- 9 min
- completed flights
- Cancelled
- 0.8%
- Flights/day
- 0.80
- last 12 months
- Duration
- 5h 0m
- scheduled
- Distance
- 2,327 mi
Monthly on-time trend
Best time to fly from PDX to IAD
Aim for departures around 8 a.m. (95% on-time); avoid 11 p.m. departures (83%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 91% | 16 min |
| Tuesdaybest | 95% | 3 min |
| Wednesday | 91% | 6 min |
| Thursday | 85% | 10 min |
| Friday | 86% | 7 min |
| Saturday | 92% | 4 min |
| Sunday | 93% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft36%
- Airline operations54%
- National airspace system8%
- Weather2%
Frequently asked questions
- How often are flights from PDX to IAD delayed?
- 10% of PDX–IAD flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 9 minutes.
- What is the best time of day to fly from PDX to IAD?
- Departures around 8 a.m. have the best record (95% on-time), while departures around 11 p.m. have the worst (83%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from PDX to IAD?
- The scheduled PDX–IAD flight time averages 5h 0m over 2,327 miles. Actual arrival times vary — flights on this route land 15+ minutes late 10% of the time.
- How often are PDX to IAD flights cancelled?
- 0.8% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from PDX to IAD?
- July 2025 was the roughest month in this dataset, with only 50% of arrivals on time. The best was October 2025 at 100%. If your dates are flexible, that 50-point gap is worth planning around.
Explore related pages
More routes from PDX
Other ways to fly to Washington (IAD)
Related guides
Based on 613 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.