Greer (GSP) to Atlanta (ATL): On-Time Performance
Data through July 2026
Greer (GSP) to Atlanta (ATL) effectively runs on two schedules. In April 2026, 95% of arrivals were on time; in June 2025 that fell to 76% — a 20-point seasonal swing. Across the full period the route averages 89% on-time against a national 78%. Morning departures also hold up better than evening ones (93% vs 81%), which matters most in the rough months.
- On-time
- 89%
- arrived <15 min late
- Avg delay
- 9 min
- completed flights
- Cancelled
- 1.4%
- Flights/day
- 7.7
- last 12 months
- Duration
- 1h 5m
- scheduled
- Distance
- 153 mi
Best airline from GSP to ATL
2 airlines flew this route regularly between 2024-07 and 2026-07.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 93% | 5 min | 1.1% | 280 |
| Delta Air Lines | 89% | 9 min | 1.5% | 5,639 |
Monthly on-time trend
Best time to fly from GSP to ATL
Aim for departures around 5 a.m. (96% on-time); avoid 6 p.m. departures (78%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 88% | 9 min |
| Tuesday | 91% | 8 min |
| Wednesdaybest | 92% | 7 min |
| Thursdaybest | 92% | 8 min |
| Friday | 90% | 10 min |
| Saturday | 88% | 10 min |
| Sunday | 84% | 13 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft41%
- Airline operations33%
- National airspace system24%
- Weather3%
Frequently asked questions
- How often are flights from GSP to ATL delayed?
- 11% of GSP–ATL flights arrived 15 or more minutes late (the US DOT definition of a delay) between 2024-07 and 2026-07. The average arrival delay across completed flights was 9 minutes.
- Which airline is most reliable from GSP to ATL?
- Southwest Airlines has the best on-time record on this route at 93%, based on 280 flights. 2 airlines flew GSP–ATL frequently enough to compare in this period.
- What is the best time of day to fly from GSP to ATL?
- Departures around 5 a.m. have the best record (96% on-time), while departures around 6 p.m. have the worst (78%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from GSP to ATL?
- The scheduled GSP–ATL flight time averages 1h 5m over 153 miles. Actual arrival times vary — flights on this route land 15+ minutes late 11% of the time.
- How often are GSP to ATL flights cancelled?
- 1.4% of scheduled flights on this route were cancelled between 2024-07 and 2026-07, at or below the national rate of 1.6%.
- What is the worst month to fly from GSP to ATL?
- June 2025 was the roughest month in this dataset, with only 76% of arrivals on time. The best was April 2026 at 95%. If your dates are flexible, that 20-point gap is worth planning around.
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Based on 5,937 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.