Airports › Greer (GSP) › May 2025
Airport month · May 2025
Greenville-Spartanburg International in May 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 May 2025, reporting carriers scheduled 1,265 domestic departures from Greenville-Spartanburg International (GSP). 76.8% left less than 15 minutes late and 75.4% reached their destination on time; 1.5% were cancelled.
Nationally that month, 76.7% of flights departed on time and 75.4% arrived on time, so GSP departures were level with the national departure figure.
A year earlier, in May 2024, the airport had 1,449 departures with 76.4% leaving on time: a change of +0.4 points, with flights down 13%.
Flights arriving at GSP that month were on time 71.2% of the time (1,268 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 42%, air carrier 28% and national aviation system 25%.
- On time 75.4%
- Arrived 15+ minutes late 22.9%
- Cancelled 1.5%
- Diverted 0.2%
May 2025 against a year earlier, the airport's year and the nation
| Measure | May 2025 | May 2024 | GSP, 12 months to Jul 2026 | All reported flights, May 2025 |
|---|---|---|---|---|
| Departed on time | 76.8% | 76.4% | 79.0% | 76.7% |
| Arrived on time | 75.4% | 74.7% | 78.9% | 75.4% |
| Cancelled | 1.5% | 1.4% | 2.7% | 1.0% |
| Average departure delay (late minutes only) | 17.1 min | 20.4 min | 16.1 min | 17.5 min |
| Scheduled departures a day | 42 | 48 | 39 | 20,188 |
| Scheduled departures | 1,265 | 1,449 | 14,201 | 605,648 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| OH PSA Airlines | 292 | 23% | 70.5% | 16.5 min | 3.1% |
| DL Delta Air Lines | 252 | 20% | 82.5% | 2.1 min | 0.0% |
| MQ Envoy Air | 232 | 18% | 78.4% | 5.7 min | 1.3% |
| YX Republic Airline | 138 | 11% | 73.2% | 11.8 min | 3.6% |
| WN Southwest Airlines | 124 | 10% | 80.6% | 7.8 min | 0.0% |
| AA American Airlines | 93 | 7% | 73.1% | 7.8 min | 2.2% |
| OO SkyWest Airlines | 65 | 5% | 72.3% | 14.6 min | 0.0% |
| G4 Allegiant Air | 36 | 3% | 58.3% | 29.7 min | 0.0% |
| UA United Airlines | 33 | 3% | 63.6% | 59.4 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| GSP–CLT | Greer to Charlotte | 263 | 74.1% | 10.8 min | 2.7% |
| GSP–ATL | Greer to Atlanta | 226 | 83.2% | 1.9 min | 0.0% |
| GSP–ORD | Greer to Chicago | 109 | 80.7% | 15.0 min | 0.0% |
| GSP–DFW | Greer to Dallas/Fort Worth | 93 | 73.1% | 8.6 min | 1.1% |
| GSP–DCA | Greer to Washington | 88 | 63.6% | 22.6 min | 3.4% |
| GSP–LGA | Greer to New York | 76 | 75.0% | 15.0 min | 3.9% |
| GSP–BWI | Greer to Baltimore | 62 | 75.8% | 8.9 min | 0.0% |
| GSP–MIA | Greer to Miami | 58 | 81.0% | 5.7 min | 0.0% |
| GSP–PHL | Greer to Philadelphia | 57 | 70.2% | 17.1 min | 5.3% |
| GSP–EWR | Greer to Newark | 52 | 67.3% | 11.3 min | 3.8% |
| GSP–DTW | Greer to Detroit | 51 | 84.3% | 2.1 min | 0.0% |
| GSP–BNA | Greer to Nashville | 31 | 80.6% | 12.0 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left GSP on time in May 2025?
76.8% of 1,265 scheduled domestic departures left less than 15 minutes late, and 75.4% reached their destination on time. The national figures that month were 76.7% and 75.4%.
How does that compare with a year earlier?
In May 2024, 76.4% of 1,449 departures left on time and 1.4% were cancelled, against 76.8% and 1.5% in May 2025.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 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.