Southwest Airlines is the most reliable airline on the HOU to GSP route with a 83% on-time rate. Based on 317 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: HOU to GSP
Houston to Greenville — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines83%
HOU to GSP Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 83% | 1.0% | 50m | 317 |
Route Overview
83%
Overall On-Time
51m
Avg Delay
0.6%
Cancel Rate
317
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.