Baltimore (BWI) to Greer (GSP): On-Time Performance
Data through July 2026
Baltimore (BWI) to Greer (GSP) effectively runs on two schedules. In September 2025, 92% of arrivals were on time; in June 2025 that fell to 63% — a 29-point seasonal swing. Across the full period the route averages 78% on-time against a national 78%. Morning departures also hold up better than evening ones (89% vs 66%), which matters most in the rough months.
- On-time
- 78%
- arrived <15 min late
- Avg delay
- 16 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 2.0
- last 12 months
- Duration
- 1h 34m
- scheduled
- Distance
- 426 mi
Monthly on-time trend
Best time to fly from BWI to GSP
Aim for departures around 8 a.m. (91% on-time); avoid 9 p.m. departures (44%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 74% | 20 min |
| Tuesday | 83% | 10 min |
| Wednesdaybest | 83% | 13 min |
| Thursday | 80% | 16 min |
| Friday | 75% | 18 min |
| Saturday | 77% | 18 min |
| Sunday | 75% | 18 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft45%
- Airline operations38%
- National airspace system13%
- Weather4%
- Security1%
Frequently asked questions
- How often are flights from BWI to GSP delayed?
- 22% of BWI–GSP 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 16 minutes.
- What is the best time of day to fly from BWI to GSP?
- Departures around 8 a.m. have the best record (91% on-time), while departures around 9 p.m. have the worst (44%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from BWI to GSP?
- The scheduled BWI–GSP flight time averages 1h 34m over 426 miles. Actual arrival times vary — flights on this route land 15+ minutes late 22% of the time.
- How often are BWI to GSP flights cancelled?
- 1.2% 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 BWI to GSP?
- June 2025 was the roughest month in this dataset, with only 63% of arrivals on time. The best was September 2025 at 92%. If your dates are flexible, that 29-point gap is worth planning around.
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Based on 1,478 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.