Delta Air Lines is the most reliable airline on the IAH to SLC route with a 84% on-time rate, compared to United Airlines at 79%. Based on 3,684 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAH to SLC
Houston to Salt Lake City — airline reliability comparison
On-Time Rate by Airline
Delta Air Lines84%
SkyWest Airlines81%
United Airlines79%
IAH to SLC Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Delta Air LinesDLBest | 84% | 0.5% | 98m | 3,684 |
| SkyWest AirlinesOO | 81% | 0.8% | 77m | 555 |
| United AirlinesUAWorst | 79% | 1.1% | 64m | 2,845 |
Route Overview
82%
Overall On-Time
79m
Avg Delay
0.8%
Cancel Rate
7,141
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.