Airports › Greer (GSP) › September 2025
Airport month · September 2025
Greenville-Spartanburg International in September 2025
BTS: A flight is counted as on time if it arrived less than 15 minutes after its scheduled time. Only carriers with at least 0.5 percent of domestic scheduled passenger revenue report.
In September 2025, reporting carriers scheduled 1,148 domestic departures from Greenville-Spartanburg International (GSP). 89.0% left less than 15 minutes late and 88.5% reached their destination on time; 0.5% were cancelled.
Nationally that month, 83.1% of flights departed on time and 82.8% arrived on time, so GSP departures were 5.9 points above the national departure figure.
A year earlier, in September 2024, the airport had 1,358 departures with 84.5% leaving on time: a change of +4.5 points, with flights down 15%.
Flights arriving at GSP that month were on time 86.2% of the time (1,148 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 39%, air carrier 29% and national aviation system 29%.
- On time 88.5%
- Arrived 15+ minutes late 10.8%
- Cancelled 0.5%
- Diverted 0.2%
September 2025 against a year earlier, the airport's year and the nation
| Measure | Sep 2025 | Sep 2024 | GSP, 12 months to Jul 2026 | All reported flights, Sep 2025 |
|---|---|---|---|---|
| Departed on time | 89.0% | 84.5% | 79.0% | 83.1% |
| Arrived on time | 88.5% | 82.4% | 78.9% | 82.8% |
| Cancelled | 0.5% | 1.7% | 2.7% | 0.5% |
| Average departure delay (late minutes only) | 8.2 min | 13.0 min | 16.1 min | 12.2 min |
| Scheduled departures a day | 38 | 45 | 39 | 18,748 |
| Scheduled departures | 1,148 | 1,358 | 14,201 | 562,439 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| OH PSA Airlines | 287 | 25% | 86.1% | -6.4 min | 0.3% |
| DL Delta Air Lines | 268 | 23% | 93.3% | -8.5 min | 0.0% |
| YX Republic Airline | 197 | 17% | 88.8% | -2.2 min | 1.0% |
| WN Southwest Airlines | 116 | 10% | 95.7% | -6.4 min | 0.0% |
| AA American Airlines | 95 | 8% | 82.1% | 8.8 min | 2.1% |
| MQ Envoy Air | 81 | 7% | 88.9% | -1.2 min | 1.2% |
| OO SkyWest Airlines | 49 | 4% | 79.6% | 0.4 min | 0.0% |
| UA United Airlines | 30 | 3% | 80.0% | 11.4 min | 0.0% |
| G4 Allegiant Air | 25 | 2% | 80.0% | -4.2 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| GSP–ATL | Greer to Atlanta | 238 | 93.3% | -7.5 min | 0.0% |
| GSP–ORD | Greer to Chicago | 128 | 86.7% | -6.0 min | 1.6% |
| GSP–CLT | Greer to Charlotte | 99 | 96.0% | -14.1 min | 0.0% |
| GSP–DFW | Greer to Dallas/Fort Worth | 98 | 76.5% | 17.1 min | 2.0% |
| GSP–DCA | Greer to Washington | 90 | 68.9% | 9.8 min | 0.0% |
| GSP–EWR | Greer to Newark | 86 | 86.0% | 1.4 min | 1.2% |
| GSP–LGA | Greer to New York | 78 | 89.7% | -3.6 min | 1.3% |
| GSP–PHL | Greer to Philadelphia | 76 | 97.4% | -19.4 min | 0.0% |
| GSP–BWI | Greer to Baltimore | 60 | 95.0% | -4.7 min | 0.0% |
| GSP–DTW | Greer to Detroit | 52 | 90.4% | -10.9 min | 0.0% |
| GSP–MIA | Greer to Miami | 32 | 96.9% | -5.4 min | 0.0% |
| GSP–BNA | Greer to Nashville | 30 | 96.7% | -8.1 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left GSP on time in September 2025?
89.0% of 1,148 scheduled domestic departures left less than 15 minutes late, and 88.5% reached their destination on time. The national figures that month were 83.1% and 82.8%.
How does that compare with a year earlier?
In September 2024, 84.5% of 1,358 departures left on time and 1.7% were cancelled, against 89.0% and 0.5% in September 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for September 2025; public domain. Domestic scheduled flights by reporting carriers, totals and averages only. The site's data runs through July 2026. Full record for GSP · methodology · corrections.