Airports › Greer (GSP) › May 2026
Airport month · May 2026
Greenville-Spartanburg International in May 2026
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 2026, reporting carriers scheduled 1,302 domestic departures from Greenville-Spartanburg International (GSP). 81.8% left less than 15 minutes late and 82.8% reached their destination on time; 1.1% were cancelled.
Nationally that month, 77.1% of flights departed on time and 77.6% arrived on time, so GSP departures were 4.7 points above the national departure figure.
A year earlier, in May 2025, the airport had 1,265 departures with 76.8% leaving on time: a change of +5.0 points, with flights up 3%.
Flights arriving at GSP that month were on time 75.4% of the time (1,303 scheduled arrivals).
Of the delay minutes that carriers assigned to a BTS cause category that month, late-arriving aircraft 44%, air carrier 27% and national aviation system 20%.
- On time 82.8%
- Arrived 15+ minutes late 15.9%
- Cancelled 1.1%
- Diverted 0.2%
May 2026 against a year earlier, the airport's year and the nation
| Measure | May 2026 | May 2025 | GSP, 12 months to Jul 2026 | All reported flights, May 2026 |
|---|---|---|---|---|
| Departed on time | 81.8% | 76.8% | 79.0% | 77.1% |
| Arrived on time | 82.8% | 75.4% | 78.9% | 77.6% |
| Cancelled | 1.1% | 1.5% | 2.7% | 0.9% |
| Average departure delay (late minutes only) | 12.4 min | 17.1 min | 16.1 min | 16.0 min |
| Scheduled departures a day | 43 | 42 | 39 | 20,391 |
| Scheduled departures | 1,302 | 1,265 | 14,201 | 611,735 |
Airlines that month
| Reporting carrier | Flights | Share | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| DL Delta Air Lines | 309 | 24% | 86.4% | -2.5 min | 1.3% |
| MQ Envoy Air | 206 | 16% | 83.0% | -0.4 min | 1.0% |
| YX Republic Airline | 201 | 15% | 88.1% | -6.3 min | 1.5% |
| OH PSA Airlines | 191 | 15% | 83.8% | 1.6 min | 0.5% |
| WN Southwest Airlines | 155 | 12% | 83.2% | 1.2 min | 0.0% |
| OO SkyWest Airlines | 85 | 7% | 75.3% | 13.7 min | 2.4% |
| AA American Airlines | 82 | 6% | 72.0% | 27.5 min | 2.4% |
| G4 Allegiant Air | 42 | 3% | 61.9% | 17.8 min | 0.0% |
| UA United Airlines | 31 | 2% | 80.6% | -2.6 min | 0.0% |
Busiest routes that month
| Route | Cities | Flights | On time | Avg arrival delay | Cancelled |
|---|---|---|---|---|---|
| GSP–ATL | Greer to Atlanta | 254 | 86.6% | -1.6 min | 1.2% |
| GSP–ORD | Greer to Chicago | 184 | 80.4% | 4.6 min | 2.2% |
| GSP–CLT | Greer to Charlotte | 121 | 89.3% | -2.8 min | 0.0% |
| GSP–DFW | Greer to Dallas/Fort Worth | 105 | 68.6% | 28.3 min | 2.9% |
| GSP–BNA | Greer to Nashville | 93 | 78.5% | 4.0 min | 0.0% |
| GSP–EWR | Greer to Newark | 92 | 93.5% | -11.8 min | 1.1% |
| GSP–DCA | Greer to Washington | 88 | 73.9% | 9.5 min | 1.1% |
| GSP–LGA | Greer to New York | 80 | 83.8% | -1.8 min | 1.3% |
| GSP–MIA | Greer to Miami | 64 | 85.9% | -4.8 min | 0.0% |
| GSP–BWI | Greer to Baltimore | 62 | 90.3% | -3.0 min | 0.0% |
| GSP–DTW | Greer to Detroit | 55 | 85.5% | -7.0 min | 1.8% |
| GSP–DEN | Greer to Denver | 31 | 80.6% | -2.6 min | 0.0% |
By scheduled departure hour
Delay causes
Questions and answers
How many flights left GSP on time in May 2026?
81.8% of 1,302 scheduled domestic departures left less than 15 minutes late, and 82.8% reached their destination on time. The national figures that month were 77.1% and 77.6%.
How does that compare with a year earlier?
In May 2025, 76.8% of 1,265 departures left on time and 1.5% were cancelled, against 81.8% and 1.1% in May 2026.
Provenance
Source: Bureau of Transportation Statistics, Reporting Carrier On-Time Performance, file for May 2026; 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.