SkyWest Airlines is the most reliable airline on the IAH to GSP route with a 73% on-time rate, compared to United Airlines at 70%. Based on 44 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: IAH to GSP
Houston to Greenville — airline reliability comparison
On-Time Rate by Airline
SkyWest Airlines73%
United Airlines70%
IAH to GSP Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| SkyWest AirlinesOOBest | 73% | 4.4% | 68m | 44 |
| United AirlinesUAWorst | 70% | 1.1% | 73m | 788 |
Route Overview
70%
Overall On-Time
73m
Avg Delay
1.3%
Cancel Rate
835
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.