Southwest Airlines is the most reliable airline on the GSP to HOU route with a 85% on-time rate. Based on 317 flights tracked.
Source: Bureau of Transportation Statistics. Updated October 2026.Best Airline: GSP to HOU
Greenville to Houston — airline reliability comparison
On-Time Rate by Airline
Southwest Airlines85%
GSP to HOU Airline Comparison
| Airline | On-Time % | Cancel % | Avg Delay | Flights |
|---|---|---|---|---|
| Southwest AirlinesWNBest | 85% | 1.2% | 52m | 317 |
Route Overview
83%
Overall On-Time
61m
Avg Delay
0.9%
Cancel Rate
317
Total Flights
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Data last updated October 2026. Source: Bureau of Transportation Statistics.