United Airlines is the most reliable airline on the PDX to IAD route with a 91% on-time rate. Based on 1,014 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: PDX to IAD
Portland to Washington — airline reliability comparison
On-Time Rate by Airline
United Airlines91%
PDX to IAD Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 91% | 1.0% | 79m | 1,014 |
Route Overview
90%
Overall On-Time
82m
Avg Delay
1.1%
Cancel Rate
1,014
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.