Route
HOU → GSP
William P. Hobby Airport Greenville-Spartanburg International Airport
845 miles
Return route GSP → HOU →
How punctual is this route?
- On-time arrivals
- 90.3%
- Less than 15 minutes late
- Cancelled
- 1.4%
- Of scheduled flights
- Average delay when late
- 53 min
- Flights arriving 15+ minutes late
- Flights tracked
- 147
- Scheduled flights in the period
What caused the delays
- Airline (crew, maintenance, cleaning) 56%
- Late-arriving aircraft 31%
- Air traffic control & airport 13%
- Extreme weather 0%
- Security 0%
Share of delay minutes airlines attributed to each cause (BTS).
Sep 2025
Mar 2026
Show as table
| Month | On time | Flights |
|---|---|---|
| September 2025 | 96.2% | 26 |
| October 2025 | 93.5% | 31 |
| November 2025 | 96.4% | 29 |
| December 2025 | 83.9% | 31 |
| January 2026 | 77.8% | 10 |
| February 2026 | 83.3% | 18 |
| March 2026 | 100.0% | 2 |
Source: U.S. DOT Bureau of Transportation Statistics on-time data, September 2025 – August 2026. Covers flights operated by reporting U.S. carriers. About our data
Airlines on this route
| Airline | Flights | On time | Cancelled | Avg. delay when late |
|---|---|---|---|---|
| Southwest Airlines | 147 | 90.3% | 1.4% | 53 min |
Delay odds by flight
How often each flight number arrived 15 or more minutes late over the last year.
-
WN173
7% late · 46 flights
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