Greenville-Spartanburg International Airport (GSP) delays & on-time performance
Greer, South Carolina · 22 nonstop destinations · 9 airlines · Aug 2025 – Jul 2026
No FAA-reported ground stops or delays at GSP right now. Individual flights can still be delayed by the airline; check with your airline for your flight.
On-time arrivals
81%
arrived < 15 min late
Cancelled
2.7%
381 flights
Avg arrival delay
16 min
81 min when late
Departed on time
81%
avg taxi-out 16 min
Figures cover 14,201 departures from GSP; on-time is measured at arrival. Arrivals into GSP were on time 76% of the time.
Key facts
- Flights departing Greenville-Spartanburg International Airport (GSP) arrived on time 81% of the time in Aug 2025 – Jul 2026, better than the 78% national average.
- 2.7% were cancelled, and 8% arrived an hour or more late.
- Delta Air Lines was the most punctual airline here (90% on time); Allegiant Air was the least (59%).
- Departures scheduled around 5am did best (94% on time); around 8pm did worst (64%).
- The largest source of delay minutes was late-arriving aircraft (43%).
Most delayed routes from GSP
Lowest on-time arrival rates among regularly flown routes.
- DCA · Washington66%1,017 flts
- LGA · New York75%927 flts
- DFW · Dallas/Fort Worth76%1,177 flts
- ORD · Chicago77%1,813 flts
- MIA · Miami80%726 flts
- DEN · Denver81%366 flts
- BNA · Nashville83%668 flts
- CLT · Charlotte84%1,504 flts
- EWR · Newark86%776 flts
- DTW · Detroit87%550 flts
Most reliable routes from GSP
Highest on-time arrival rates among regularly flown routes.
- ATL · Atlanta90%2,819 flts
- BWI · Baltimore90%719 flts
- PHL · Philadelphia89%441 flts
- DTW · Detroit87%550 flts
- EWR · Newark86%776 flts
- CLT · Charlotte84%1,504 flts
- BNA · Nashville83%668 flts
- DEN · Denver81%366 flts
- MIA · Miami80%726 flts
- ORD · Chicago77%1,813 flts
Best airline at GSP
Departures from this airport, ranked by on-time arrival.
| Airline | On time | Cancelled | Avg delay | Routes | Flights |
|---|---|---|---|---|---|
| Delta Air Lines | 90% | 1.7% | 9 min | 4 | 3,214 |
| Southwest Airlines | 87% | 1.1% | 7 min | 5 | 1,563 |
| Republic Airways | 81% | 4.8% | 16 min | 5 | 2,036 |
| United Airlines | 80% | 0.0% | 17 min | 2 | 223 |
| PSA Airlines | 78% | 3.2% | 22 min | 5 | 2,766 |
| Envoy Air | 78% | 2.2% | 15 min | 6 | 1,914 |
| American Airlines | 77% | 3.8% | 23 min | 6 | 1,073 |
| SkyWest Airlines | 76% | 3.7% | 22 min | 4 | 913 |
| Allegiant Air | 59% | 0.8% | 35 min | 4 | 499 |
Best time to fly out of GSP
On-time arrival rate by scheduled departure hour (local time).
- 5am94%642 flts
- 6am90%2,181 flts
- 7am86%1,814 flts
- 8am89%880 flts
- 9am90%282 flts
- 10am87%1,007 flts
- 11am83%932 flts
- 12pm83%1,153 flts
- 1pm83%514 flts
- 2pm81%200 flts
- 3pm74%465 flts
- 4pm76%765 flts
- 5pm68%1,121 flts
- 6pm69%921 flts
- 7pm66%798 flts
- 8pm64%471 flts
Monthly trend
Why departures were late
- Late-arriving aircraft43%
- Airline (crew, maintenance, cleaning, fueling)30%
- Air traffic control & airport congestion19%
- Extreme weather8%
- Security0%
Data: U.S. DOT Bureau of Transportation Statistics, Aug 2025 – Jul 2026 (12 months). Latest month published by BTS: July 2026. How we calculate this.