United Airlines is the most reliable airline on the IAD to PDX route with a 78% on-time rate. Based on 1,012 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAD to PDX
Washington to Portland — airline reliability comparison
On-Time Rate by Airline
United Airlines78%
IAD to PDX Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 78% | 0.9% | 83m | 1,012 |
Route Overview
78%
Overall On-Time
84m
Avg Delay
1%
Cancel Rate
1,012
Total Flights
Flying out of IAD? We'll brief you.
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Data last updated October 2026. Source: Bureau of Transportation Statistics.