Best Time to Fly IAD to PDX
Washington to Portland — month-by-month delay data from the Bureau of Transportation Statistics.
Best month
March
1% on time
Worst month
March
1% on time
IAD → PDX on-time performance by month
24
25
26
JanFebMarAprMayJunJulAugSepOctNovDec
Worse
Better
Monthly breakdown
| Month | On-time | Cancel rate | Flights |
|---|---|---|---|
| March | 1% | 0% | 107 |
| April | 1% | 0% | 120 |
| May | 1% | 0% | 124 |
| June | 1% | 0% | 130 |
| July | 1% | 0% | 124 |
| August | 1% | 0% | 93 |
| September | 1% | 0% | 90 |
| October | 1% | 0% | 92 |
| November | 1% | 0% | 81 |
| December | 1% | 0% | 51 |
Frequently asked
What is the best month to fly from IAD to PDX?
March has the highest on-time rate at 1% for flights from Washington to Portland.
What is the worst month to fly IAD to PDX?
March has the lowest on-time rate at 1%, often due to seasonal weather patterns.
How often are IAD to PDX flights delayed?
On average, 1% of flights from IAD to PDX arrive on time. That means about 99% experience some form of delay.
Source: Bureau of Transportation Statistics.