Washington (IAD) to Portland (PDX): On-Time Performance
Data through July 2026
Washington (IAD) to Portland (PDX) 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, 76% arrived on time.
- On-time
- 76%
- arrived <15 min late
- Avg delay
- 24 min
- completed flights
- Cancelled
- 0.7%
- Flights/day
- 0.80
- last 12 months
- Duration
- 5h 43m
- scheduled
- Distance
- 2,327 mi
Monthly on-time trend
Best time to fly from IAD to PDX
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 24 min |
| Tuesday | 77% | 18 min |
| Wednesday | 77% | 15 min |
| Thursday | 66% | 26 min |
| Fridaybest | 83% | 16 min |
| Saturday | 72% | 49 min |
| Sunday | 81% | 19 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft28%
- Airline operations29%
- National airspace system20%
- Weather23%
Frequently asked questions
- How often are flights from IAD to PDX delayed?
- 25% of IAD–PDX 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 24 minutes.
- How long is the flight from IAD to PDX?
- The scheduled IAD–PDX flight time averages 5h 43m over 2,327 miles. Actual arrival times vary — flights on this route land 15+ minutes late 25% of the time.
- How often are IAD to PDX flights cancelled?
- 0.7% 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 IAD to PDX?
- July 2025 was the roughest month in this dataset, with only 52% of arrivals on time. The best was October 2024 at 97%. If your dates are flexible, that 45-point gap is worth planning around.
Explore related pages
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Related guides
Based on 613 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.