Greer (GSP) to Detroit (DTW): On-Time Performance
Data through May 2026
Greer (GSP) to Detroit (DTW) effectively runs on two schedules. In October 2025, 100% of arrivals were on time; in July 2024 that fell to 75% — a 25-point seasonal swing. Across the full period the route averages 85% on-time against a national 78%. Morning departures also hold up better than evening ones (91% vs 73%), which matters most in the rough months.
- On-time
- 85%
- arrived <15 min late
- Avg delay
- 15 min
- completed flights
- Cancelled
- 1.7%
- Flights/day
- 1.7
- last 12 months
- Duration
- 1h 49m
- scheduled
- Distance
- 508 mi
Best airline from GSP to DTW
3 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Delta Air Linesmost reliable | 91% | 9 min | 2.5% | 517 |
| Endeavor Air | 84% | 11 min | 0.6% | 320 |
| SkyWest Airlines | 78% | 27 min | 1.6% | 374 |
Monthly on-time trend
Best time to fly from GSP to DTW
Aim for departures around 1 p.m. (100% on-time); avoid 5 p.m. departures (67%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 80% | 22 min |
| Tuesday | 84% | 19 min |
| Wednesday | 85% | 14 min |
| Thursday | 89% | 8 min |
| Friday | 82% | 16 min |
| Saturdaybest | 94% | 7 min |
| Sunday | 85% | 16 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft20%
- Airline operations63%
- National airspace system5%
- Weather12%
Frequently asked questions
- How often are flights from GSP to DTW delayed?
- 15% of GSP–DTW flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-06 and 2026-05. The average arrival delay across completed flights was 15 minutes.
- Which airline is most reliable from GSP to DTW?
- Delta Air Lines has the best on-time record on this route at 91%, based on 517 flights. 3 airlines flew GSP–DTW frequently enough to compare in this period.
- What is the best time of day to fly from GSP to DTW?
- Departures around 1 p.m. have the best record (100% on-time), while departures around 5 p.m. have the worst (67%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from GSP to DTW?
- The scheduled GSP–DTW flight time averages 1h 49m over 508 miles. Actual arrival times vary — flights on this route land 15+ minutes late 15% of the time.
- How often are GSP to DTW flights cancelled?
- 1.7% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, slightly above the national rate of 1.6%.
- What is the worst month to fly from GSP to DTW?
- July 2024 was the roughest month in this dataset, with only 75% of arrivals on time. The best was October 2025 at 100%. If your dates are flexible, that 25-point gap is worth planning around.
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Based on 1,211 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.