Route Reliability
Houston → Greenville
HOU–GSP · 845 miles · William P. Hobby Airport to Greenville–Spartanburg International Airport
- 82%
- Arrive within 15 minutes
- 4 min
- Average arrival delay
- 0.9%
- Cancelled
- 234
- Flights in the data
Data through May 2026.
Southwest Airlines is the only airline in this data on this route, arriving on time 82% of the time across 234 flights. No comparison to make.
What the data says
Morning-you made the right choice.
HOU–GSP flights departing between 9 AM–12 PM arrived on time 92% of the time, versus 67% between 12–3 PM.
Friday is doing you no favors.
HOU–GSP flights arrived on time 91% of the time on Tuesdays and just 67% on Fridays. That gap is worth planning around.
Slipping a little lately.
HOU–GSP flights arrived on time 88% of the time over the last three months in the data, compared with 91% in the three months before that.
Flights on this route
The breakdown
- Mon81%(37 flights)
- Tue91%(32 flights)
- Wed87%(31 flights)
- Thu80%(35 flights)
- Fri67%(36 flights)
- Sat85%(26 flights)
- Sun89%(35 flights)
- 9 AM–12 PM92%(131 flights)
- 12–3 PM67%(78 flights)
- 3–6 PM78%(23 flights)
Jun 63% → Feb 83% on time
| Month | On-time percentage | Flights |
|---|---|---|
| June 2025 | 63% | 30 |
| July 2025 | 61% | 31 |
| August 2025 | 85% | 26 |
| September 2025 | 96% | 26 |
| October 2025 | 94% | 31 |
| November 2025 | 96% | 28 |
| December 2025 | 84% | 31 |
| February 2026 | 83% | 18 |
Same trip, other airports
Keep nerding
Based on 234 historical flights, because apparently we checked. Historical flight data: U.S. Bureau of Transportation Statistics, June 2025 – May 2026. Data through May 2026. How we calculate this.