Route · PDX → IAD · 2020–2025 BTS data
Portland to Washington
According to PlainFlights' route traffic ranking (BTS On-Time Performance total flights), PDX to IAD (Portland to Washington) ranks #4337 of 4927 tracked domestic routes by total flights (most flights = #1).
Data updated 2026-06-13
- 88.3%
- On-time
- +9.3 pts
- vs US avg
- 87 min
- Delay when late
- 1,216
- Flights
- #4337 of 4927
- Corpus placement
Cancelled
1.3%
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 | 0 | 0 | 0 | UA |
| Oct 2025 | 31 | 0 | 0 | 0 | UA |
| Sep 2025 | 30 | 1 | 0 | 0 | UA |
| Aug 2025 | 31 | 6 | 0 | 0 | UA |
| Jul 2025 | 31 | 15 | 1 | 0 | UA |
| Jun 2025 | 31 | 3 | 0 | 1 | UA |
| May 2025 | 31 | 4 | 0 | 0 | UA |
| Apr 2025 | 30 | 4 | 0 | 0 | UA |
| Nov 2024 | 30 | 1 | 0 | 0 | UA |
| Oct 2024 | 31 | 1 | 0 | 0 | UA |
| Sep 2024 | 30 | 3 | 0 | 0 | UA |
| Aug 2024 | 30 | 3 | 0 | 0 | UA |
| Jul 2024 | 31 | 2 | 1 | 0 | UA |
| Jun 2024 | 31 | 2 | 0 | 0 | UA |
| May 2024 | 31 | 7 | 0 | 0 | UA |
| Apr 2024 | 30 | 2 | 0 | 0 | UA |
| Oct 2023 | 30 | 1 | 0 | 0 | UA |
| Sep 2023 | 30 | 5 | 0 | 0 | UA |
| Aug 2023 | 31 | 4 | 0 | 0 | UA |
| Jul 2023 | 31 | 11 | 2 | 0 | UA |
| Jun 2023 | 40 | 7 | 3 | 0 | UA |
| May 2023 | 31 | 3 | 0 | 0 | UA |
| Apr 2023 | 30 | 0 | 1 | 0 | UA |
| Dec 2022 | 32 | 5 | 2 | 0 | UA |
PDX–IAD seasonal on-time pattern
Best: November (95.8%) · weakest: July (78.1%)
Strongest calendar month
November
95.8% on-time · ~30 flights/mo
Busiest calendar month
June
~35 flights/mo avg
Weakest calendar month
July
78.1% on-time · ~31 flights/mo
Cancellation Rate
1.3%
10 of 744 flights
Diversion Rate
0.1%
1 of 744 flights
Explore origin & destination
On-time and delay data for the airports this route connects.
PDX - Portland
Full on-time, delay-cause, and seasonal performance for Portland, OR.
PDX on-time profileIAD - Washington
Full on-time, delay-cause, and seasonal performance for Washington, DC.
IAD on-time profileCompare the two airports
See PDX and IAD side by side on delays, cancellations, and reliability.
Compare PDX vs IADOrigin-hub reliability standing
Among PDX's stronger departures
PDX → IAD posts a 88.3% on-time rate, landing in the ≥85% band with 26 of 44 BTS-tracked routes leaving Portland. The same hub also shows 17 mid-band and 1 challenged departures · fleet-wide on-time rank #370 of 4927 (highest on-time = #1).
Similar routes
Other BTS-tracked routes with comparable performance or trip length to PDX–IAD.
Routes with a similar on-time rate
What the Data Says About PDX to IAD
Portland to Washington (PDX to IAD) is one of the more dependable pairings in the BTS On-Time Performance dataset: a 88.3% on-time rate across 1,216 flights, with delays that do happen averaging 86.6 minutes. The corridor runs roughly 2,327 miles and is served by 1 carrier. Over the most recent 24 months, 10 of 744 flights were cancelled (1.3%) and 1 diverted (0.1%).
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, PDX–IAD peaks in November at 95.8% on-time while June carries the heaviest traffic (~35 flights per month) ; the softest month is July at 78.1%, a 17.7-point swing that repeats because the corridor's weather and holiday mix stays stable year to year.
Frequently Asked Questions
Where does PDX to IAD rank among US routes by traffic? ▼
How often are flights delayed from PDX to IAD? ▼
What is the cancellation rate for PDX to IAD? ▼
How far is the flight from PDX to IAD? ▼
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 PDX–IAD data
PDX–IAD runs 9.3 pts above the national 79% average; the remaining risk is month-to-month swing and carrier mix, not a weak headline rate.
- Compare PDX and IAD airport profiles: delay causes and top routes differ even on the same corridor. PDX airport
- If your dates flex, November (95.8% on-time) beats July (78.1%) on this corridor. Seasonal chart
- 4 other routes post a similar 88.3% 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.