IAD to PDX flight delays
Washington, VA (IAD) Portland, OR (PDX) · 2,327 miles
582 flights · July 2024 – July 2026 · US Bureau of Transportation Statistics
75.78%
Arrived on time
Within 15 minutes of schedule
0.52%
Cancelled
Share of scheduled flights
86 min
When late, late by
Average across delayed arrivals
22 min
Delay per flight
Averaged over every flight flown
What the record says about this route
The season swings this route hard. In October it ran 45.2 points more punctual than in July — a difference bigger than the one between the best and worst airlines on most routes. If the date is flexible, it is worth more than the carrier.
The two directions do not behave alike. PDX to IAD arrives on time 15 points more often than the outbound. Delay accumulates through the flying day, so whichever direction is scheduled later tends to carry the worse record — which is an argument for booking the morning departure if the choice exists.
This route does worse than its own airport. IAD as a whole runs 7.5 points more punctual than these flights, which points at something specific to the route — the time of day it is scheduled, or the aircraft that feed it — rather than the airport.
Only United Airlines flies this route in the published record, so there is no choice to weigh — the route's figures and the airline's are the same figures.
Which airline should you fly on this route?
Over July 2024 – July 2026, United Airlines arrived on time most often on IAD to PDX. Flights ran closest to schedule in October and worst in January.
Every airline on IAD to PDX
Ranked by how many flights each one operated. A carrier with fewer than 100 flights in the period is listed but not graded.
| Airline | Flights | On time | Cancelled | Avg delay | Grade |
|---|---|---|---|---|---|
| United Airlines | 582 | 75.78% | 0.52% | 86 min | C |
Month by month
Share of flights that arrived within 15 minutes of schedule, by month flown.
The return leg
PDX to IAD Portland back to Washington 90.8% on time AOther routes from Washington
Common questions
Are flights from Washington to Portland usually delayed?
75.78% of flights on the IAD to PDX route arrived within 15 minutes of schedule, so roughly 2 in every ten arrived late. That is about the same as the average route in this record.
Which airlines fly from Washington to Portland?
Only United Airlines appears in the published record on this route, with 582 flights and 75.78% arriving on time.
How often are IAD to PDX flights cancelled?
0.52% of scheduled flights did not operate — about 5 in every thousand. That is in the normal range.
What is the best month to fly Washington to Portland?
October, when 96.8% of flights arrived on time. The worst was July at 51.6%.
When IAD to PDX flights are late, how late are they?
About 86 minutes on average across the flights that arrived more than 15 minutes behind schedule.
What these figures do and do not tell you
Everything on this page is counted from the flights that actually operated on IAD to PDX during July 2024 – July 2026, as reported by the airlines to the US Bureau of Transportation Statistics. "On time" is the federal definition: arriving at the gate within 15 minutes of the scheduled time.
A route's record is a description of the past, not a forecast. Weather, air traffic control and the aircraft's earlier flights that day drive most delays, and none of them are predictable from a historical rate. What the record does tell you is whether this route runs late more often than others, and which carrier on it has the better history — which is the part you can actually act on when you book.
Cancellations are counted separately from delays because they are a different problem for a traveller: a late flight still gets you there. How the grade is calculated →