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Route Reliability

Portland → Washington

PDX–IAD · 2,327 miles · Portland International Airport to Washington Dulles International Airport

95
Nerd Approved
WanderNerd Reliability Score
90%
Arrive within 15 minutes
6 min early
Average arrival delay
0.3%
Cancelled
292
Flights in the data

Data through May 2026.

United Airlines is the only airline in this data on this route, arriving on time 90% of the time across 292 flights. No comparison to make.

What the data says

Morning-you made the right choice.

PDX–IAD flights departing between 6–9 AM arrived on time 97% of the time, versus 78% between 9 PM–12 AM.

Friday is doing you no favors.

PDX–IAD flights arrived on time 93% of the time on Sundays. On Fridays: 83%.

It basically never cancels.

Out of 292 scheduled flights, only 0.3% were cancelled.

Slipping a little lately.

PDX–IAD flights arrived on time 94% of the time over the last three months in the data, compared with 100% in the three months before that.

Flights on this route

The breakdown

On-time by weekday
  • Mon88%(42 flights)
  • Tue93%(40 flights)
  • Wed90%(40 flights)
  • Thu88%(42 flights)
  • Fri83%(41 flights)
  • Sat93%(42 flights)
  • Sun93%(43 flights)
On-time by departure window
  • 6–9 AM97%(183 flights)
  • 9 PM–12 AM78%(107 flights)
On-time trend by month
94%
May

Jun 90% → May 94% on time

On-time arrival percentage by month
MonthOn-time percentageFlights
June 202590%30
July 202550%30
August 202581%31
September 202597%30
October 2025100%31
November 2025100%30
December 2025100%15
March 202693%27
April 202697%30
May 202694%31

Same trip, other airports

Keep nerding

Based on 292 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.