United Airlines is the most reliable airline on the IAH to IAD route with a 78% on-time rate. Based on 6,356 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAH to IAD
Houston to Washington — airline reliability comparison
On-Time Rate by Airline
United Airlines78%
IAH to IAD Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 78% | 0.9% | 62m | 6,356 |
Route Overview
78%
Overall On-Time
62m
Avg Delay
0.8%
Cancel Rate
6,356
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.