United Airlines is the most reliable airline on the IAD to IAH route with a 82% on-time rate. Based on 6,351 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAD to IAH
Washington to Houston — airline reliability comparison
On-Time Rate by Airline
United Airlines82%
IAD to IAH Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| United AirlinesUABest | 82% | 0.9% | 64m | 6,351 |
Route Overview
81%
Overall On-Time
64m
Avg Delay
0.9%
Cancel Rate
6,351
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.