Atlanta (ATL) to Greer (GSP): On-Time Performance
Data through May 2026
When you fly ATL to GSP matters as much as anything else about the booking: the route swung from 93% on-time in April 2026 to just 63% in June 2025. Across the full period the route averages 84% on-time against a national 78%. Morning departures also hold up better than evening ones (91% vs 78%), which matters most in the rough months.
- On-time
- 84%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 1.4%
- Flights/day
- 7.7
- last 12 months
- Duration
- 56m
- scheduled
- Distance
- 153 mi
Best airline from ATL to GSP
2 airlines flew this route regularly between 2024-06 and 2026-05.
| Airline | On-time | Avg delay | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlinesmost reliable | 93% | 4 min | 0.6% | 315 |
| Delta Air Lines | 83% | 11 min | 1.5% | 5,356 |
Monthly on-time trend
Best time to fly from ATL to GSP
Aim for departures around 11 a.m. (93% on-time); avoid 11 p.m. departures (72%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 82% | 10 min |
| Tuesday | 86% | 10 min |
| Wednesdaybest | 87% | 7 min |
| Thursday | 85% | 9 min |
| Friday | 83% | 12 min |
| Saturday | 83% | 11 min |
| Sunday | 79% | 12 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft24%
- Airline operations56%
- National airspace system14%
- Weather6%
Frequently asked questions
- How often are flights from ATL to GSP delayed?
- 17% of ATL–GSP 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 10 minutes.
- Which airline is most reliable from ATL to GSP?
- Southwest Airlines has the best on-time record on this route at 93%, based on 315 flights. 2 airlines flew ATL–GSP frequently enough to compare in this period.
- What is the best time of day to fly from ATL to GSP?
- Departures around 11 a.m. have the best record (93% on-time), while departures around 11 p.m. have the worst (72%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from ATL to GSP?
- The scheduled ATL–GSP flight time averages 56m over 153 miles. Actual arrival times vary — flights on this route land 15+ minutes late 17% of the time.
- How often are ATL to GSP flights cancelled?
- 1.4% of scheduled flights on this route were cancelled between 2024-06 and 2026-05, at or below the national rate of 1.6%.
- What is the worst month to fly from ATL to GSP?
- June 2025 was the roughest month in this dataset, with only 63% of arrivals on time. The best was April 2026 at 93%. If your dates are flexible, that 30-point gap is worth planning around.
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Based on 5,693 flights, 2024-06–2026-05. Source: US DOT Bureau of Transportation Statistics. Updated 2026-07-01.