FlightRecord

Greenville-Spartanburg International Airport (GSP): Delays & On-Time Performance

Data through May 2026

Greenville-Spartanburg International Airport (GSP) is a tale of two seasons: departures ran 91% on-time in November 2024 but sank to 71% in June 2025. Across the year it averages 82% against a national 78%, over roughly 39 departures a day to 23 destinations.

Departures on-time
82%
left <15 min late
Avg dep delay
16 min
Arrivals on-time
77%
Cancelled
2.2%
Destinations
23
nonstop
Airlines
10

Monthly on-time trend

Monthly departure on-time percentage at GSP50%75%100%June 2024: 84% on-time (1,413 flights)84Jun 2024July 2024: 75% on-time (1,501 flights)75August 2024: 83% on-time (1,482 flights)83September 2024: 86% on-time (1,358 flights)86Sep 2024October 2024: 90% on-time (1,465 flights)90November 2024: 91% on-time (1,345 flights)91December 2024: 81% on-time (1,342 flights)81Dec 2024January 2025: 85% on-time (1,098 flights)85February 2025: 83% on-time (1,058 flights)83March 2025: 83% on-time (1,213 flights)83Mar 2025April 2025: 84% on-time (1,144 flights)84May 2025: 78% on-time (1,265 flights)78June 2025: 71% on-time (1,227 flights)71Jun 2025July 2025: 72% on-time (1,316 flights)72August 2025: 83% on-time (1,214 flights)83September 2025: 90% on-time (1,148 flights)90Sep 2025October 2025: 83% on-time (1,199 flights)83November 2025: 83% on-time (1,144 flights)83December 2025: 75% on-time (1,153 flights)75Dec 2025January 2026: 83% on-time (1,109 flights)83February 2026: 83% on-time (1,056 flights)83March 2026: 78% on-time (1,203 flights)78Mar 2026April 2026: 88% on-time (1,120 flights)88May 2026: 83% on-time (1,302 flights)83

Best time of day to depart from GSP

On-time percentage by scheduled departure hour at GSP5 a.m.: 94% on-time (1,792 flights)56 a.m.: 91% on-time (4,099 flights)67 a.m.: 89% on-time (3,688 flights)78 a.m.: 90% on-time (1,471 flights)89 a.m.: 89% on-time (768 flights)910 a.m.: 85% on-time (1,985 flights)1011 a.m.: 83% on-time (2,246 flights)1112 p.m.: 81% on-time (2,284 flights)121 p.m.: 85% on-time (691 flights)132 p.m.: 81% on-time (1,018 flights)143 p.m.: 75% on-time (830 flights)154 p.m.: 78% on-time (2,077 flights)165 p.m.: 72% on-time (2,079 flights)176 p.m.: 71% on-time (2,308 flights)187 p.m.: 67% on-time (1,454 flights)198 p.m.: 64% on-time (883 flights)209 p.m.: 46% on-time (112 flights)21scheduled departure hour

Busiest routes from GSP

RouteFlights/12moOn-timeAvg delay
GSP → ATL2,80790%9 min
GSP → ORD1,76676%17 min
GSP → CLT1,57079%19 min
GSP → DFW1,17576%22 min
GSP → DCA1,02171%24 min
GSP → LGA94281%16 min
GSP → EWR74385%15 min
GSP → MIA72583%12 min

Most reliable routes

  1. GSP → ATL90%
  2. GSP → BNA88%
  3. GSP → PHL86%
  4. GSP → EWR85%
  5. GSP → BWI85%

Most delay-prone routes

  1. GSP → SFB50%
  2. GSP → FLL52%
  3. GSP → PIE60%
  4. GSP → DCA71%
  5. GSP → DFW76%

Airline performance at GSP

AirlineOn-time departuresAvg delayFlights
Delta Air Lines88%10 min5,876
Endeavor Air86%12 min911
United Airlines86%18 min677
Republic Airways85%13 min4,069
Southwest Airlines82%11 min3,021
SkyWest Airlines82%18 min1,647
PSA Airlines81%19 min6,842
Envoy Air80%14 min3,594
American Airlines75%24 min2,426
Allegiant Air59%36 min812

Frequently asked questions

How often are flights delayed at GSP?
18% of departures from Greenville-Spartanburg International Airport left 15+ minutes late between 2024-06 and 2026-05, with an average departure delay of 16 minutes. The national on-time average over the same period was 78%.
What is the best time of day to depart from GSP?
Flights scheduled around 5 a.m. depart on time 94% of the time at GSP, versus 46% around 9 p.m.. Booking before noon is the usual rule of thumb here.
What is the worst month for delays at GSP?
In this dataset, June 2025 was the weakest month at GSP, with 71% of departures on time.
How often are flights cancelled at GSP?
2.2% of scheduled departures from GSP were cancelled in this period, compared with a national rate of 1.6%.

Popular route pages from this airport

Based on 29,875 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.