Best Time to Fly DEN to GSP: On-Time Stats by Hour & Airline
Denver International → Greenville-Spartanburg International
Data through July 2026 · Last updated October 18, 2026
366 flights were scheduled from Denver (DEN) to Greer (GSP) in the last 12 months, and 86.2% of those that flew arrived on time, 8.6 points above the US average of 77.6%.
SkyWest Airlines was the most punctual of the 2 airlines on the route at 87.7%, while United Airlines trailed at 85.1%.
May has been the best month (95% on time) and Saturday the weakest day of the week (78%).
1.1% of flights were cancelled, versus 1.8% nationally.
DEN to GSP on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| SkyWest Airlines | 87.7% | 45 min | 2.8% | 142 |
| United Airlines | 85.1% | 47 min | 0.0% | 222 |
| Southwest Airlines | Limited data | 2 | ||
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DEN to GSP
On-time arrival % by scheduled departure hour (local time), 749 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 9am–10am | 87.9% | 0.0% | 132 |
| 10am–11am | 84.4% | 0.8% | 615 |
| 1pm–2pm | Limited data | 2 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DEN to GSP
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | Limited data | 14 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 93.3% | +6.9 pts | 0.0% | 30 |
| Summer peak (Jun 15 - Aug 15) | 77.9% | -8.5 pts | 0.0% | 140 |
| All other days | 86.4% | — | 0.9% | 565 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).