Republic Airways is the most reliable airline on the PWM to IAD route with a 89% on-time rate, compared to United Airlines at 86%. Based on 2,039 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: PWM to IAD
Portland to Washington — airline reliability comparison
On-Time Rate by Airline
Republic Airways89%
United Airlines86%
PWM to IAD Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Republic AirwaysYXBest | 89% | 2.1% | 67m | 2,039 |
| United AirlinesUAWorst | 86% | 1.0% | 97m | 278 |
Route Overview
87%
Overall On-Time
82m
Avg Delay
2.3%
Cancel Rate
2,343
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.