Best Time to Fly DTW to GSP: On-Time Stats by Hour & Airline
Detroit Metro Wayne County → Greenville-Spartanburg International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 75.8% of Detroit (DTW) to Greer (GSP) flights arrived on time (551 scheduled flights). That is 1.9 points below the national average of 77.6%.
Among 2 airlines, Delta Air Lines led with 78.1% on time and SkyWest Airlines was last with 69.9%.
Over 24 months, Thursday was the most reliable day (83% on time) and January the worst month (64%).
The cancellation rate was 2.5% (US average 1.8%).
DTW 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 |
|---|---|---|---|---|
| Delta Air Lines | 78.1% | 78 min | 2.3% | 393 |
| SkyWest Airlines | 69.9% | 89 min | 3.2% | 158 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly DTW to GSP
On-time arrival % by scheduled departure hour (local time), 1,144 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 8am–9am | 80.7% | 0.0% | 125 |
| 9am–10am | Limited data | 25 | |
| 10am–11am | 85.3% | 0.0% | 157 |
| 3pm–4pm | 76.7% | 1.1% | 175 |
| 4pm–5pm | 70.3% | 2.5% | 200 |
| 5pm–6pm | Limited data | 16 | |
| 7pm–8pm | 78.7% | 1.0% | 209 |
| 8pm–9pm | 77.4% | 3.5% | 172 |
| 9pm–10pm | 72.2% | 0.0% | 37 |
| 10pm–11pm | Limited data | 28 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on DTW 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 | 29 | ||
| Christmas & New Year (Dec 20 - Jan 3) | 72.0% | -8.6 pts | 2.0% | 51 |
| Summer peak (Jun 15 - Aug 15) | 74.4% | -6.2 pts | 0.8% | 243 |
| All other days | 80.6% | — | 1.3% | 821 |
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).