Route · IAD → PDX · 2020–2025 BTS data
Washington to Portland
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), IAD to PDX (Washington to Portland) ranks #4339 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 78%
- On-time
- -1 pts
- vs US avg
- 87 min
- Delay when late
- 1,214
- Flights
- #4339 of 4927
- Corpus placement
Cancelled
1.1%
Best Month
N/A
Worst Month
N/A
Distance
2,327 mi
Carriers
1
Monthly Performance
Recent 24 months of route data.
| Period | Flights | Delayed | Cancelled | Diverted | Carriers |
|---|---|---|---|---|---|
| Nov 2025 | 30 | 9 | 0 | 0 | UA |
| Oct 2025 | 31 | 3 | 0 | 0 | UA |
| Sep 2025 | 30 | 5 | 0 | 0 | UA |
| Aug 2025 | 31 | 5 | 0 | 0 | UA |
| Jul 2025 | 31 | 15 | 0 | 0 | UA |
| Jun 2025 | 30 | 11 | 0 | 0 | UA |
| May 2025 | 31 | 5 | 0 | 0 | UA |
| Apr 2025 | 30 | 7 | 0 | 0 | UA |
| Nov 2024 | 30 | 1 | 0 | 0 | UA |
| Oct 2024 | 31 | 1 | 0 | 0 | UA |
| Sep 2024 | 30 | 5 | 0 | 0 | UA |
| Aug 2024 | 31 | 9 | 0 | 1 | UA |
| Jul 2024 | 31 | 12 | 1 | 0 | UA |
| Jun 2024 | 30 | 12 | 0 | 0 | UA |
| May 2024 | 31 | 9 | 0 | 0 | UA |
| Apr 2024 | 30 | 5 | 0 | 0 | UA |
| Oct 2023 | 30 | 5 | 0 | 0 | UA |
| Sep 2023 | 30 | 5 | 2 | 0 | UA |
| Aug 2023 | 31 | 6 | 0 | 0 | UA |
| Jul 2023 | 31 | 12 | 1 | 0 | UA |
| Jun 2023 | 40 | 8 | 2 | 0 | UA |
| May 2023 | 31 | 3 | 0 | 0 | UA |
| Apr 2023 | 30 | 8 | 1 | 0 | UA |
| Dec 2022 | 31 | 9 | 1 | 1 | UA |
IAD–PDX seasonal on-time pattern
Best: October (91.6%) · weakest: December (54.8%)
Strongest calendar month
October
91.6% on-time · ~31 flights/mo
Busiest calendar month
June
~35 flights/mo avg
Weakest calendar month
December
54.8% on-time · ~31 flights/mo
Cancellation Rate
1.1%
8 of 742 flights
Diversion Rate
0.3%
2 of 742 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
IAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
IAD on-time profilePDX - Portland
Full on-time, delay-cause, and seasonal performance for Portland, OR.
PDX on-time profileCompare the two airports
See IAD and PDX side by side on delays, cancellations, and reliability.
Compare IAD vs PDXOrigin-hub reliability standing
Mid-pack among IAD departures
From IAD, this corridor sits with 42 other 75–85% on-time routes out of 58 tracked departures, not the hub's reliability leaders (14 at ≥85%) and not the softest ( 2 below 75%). Destination: Portland · fleet on-time rank #3839 of 4927.
Similar routes
Other BTS-tracked routes with comparable performance or trip length to IAD–PDX.
Routes with a similar on-time rate
What the Data Says About IAD to PDX
The Washington to Portland corridor (IAD to PDX) posts a 78% on-time rate on the lower edge of the average band, based on 1,214 tracked flights. Late flights run 87.0 minutes behind on average. 1 carrier cover the 2,327-mile route; over the last 24 months, 8 of 742 flights were cancelled (1.1%) and 0.3% diverted.
Monthly performance data for this route did not show a clear best/worst split in the sample window; review the monthly table above for period-by-period detail.
On the multi-year calendar, IAD–PDX peaks in October at 91.6% on-time while June carries the heaviest traffic (~35 flights per month) ; the softest month is December at 54.8%, a 36.8-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does IAD to PDX rank among US routes by traffic? ▼
How often are flights delayed from IAD to PDX? ▼
What is the cancellation rate for IAD to PDX? ▼
How far is the flight from IAD to PDX? ▼
Airports on this route
Data source
Data Source: Bureau of Transportation Statistics (BTS), On-Time Performance Data. Statistics reflect cumulative performance across all available reporting periods.
Read our methodology - how this data is sourced, computed, and verified.
Using IAD–PDX data
IAD–PDX is mid-pack at 78% on-time; month and carrier mix move more than the corridor headline.
- Compare IAD and PDX airport profiles: delay causes and top routes differ even on the same corridor. IAD airport
- If your dates flex, October (91.6% on-time) beats December (54.8%) on this corridor. Seasonal chart
- 4 other routes post a similar 78% on-time rate; compare before you commit to this pairing. Similar routes
On-time rate reflects the BTS historical average across all reporting carriers on this origin–destination pair, not any single flight or booking recommendation.
Every figure on PlainFlights is rendered directly from BTS On-Time Performance data, no number is typed in by an editor. This page aggregates this specific route's on-time performance and monthly trend, live from the dataset. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.