Greer (GSP) to Baltimore (BWI): On-Time Performance
Data through July 2026
The calendar drives reliability on GSP–BWI. September 2025 flights landed on schedule 95% of the time, but August 2024 dropped to 62% — a gap of 33 points. Across the full period the route averages 85% on-time against a national 78%. Morning departures also hold up better than evening ones (95% vs 65%), which matters most in the rough months.
- On-time
- 85%
- arrived <15 min late
- Avg delay
- 10 min
- completed flights
- Cancelled
- 1.2%
- Flights/day
- 2.0
- last 12 months
- Duration
- 1h 31m
- scheduled
- Distance
- 426 mi
Monthly on-time trend
Best time to fly from GSP to BWI
Aim for departures around 6 a.m. (95% on-time); avoid 7 p.m. departures (58%).
By day of week
| Day | On-time | Avg delay |
|---|---|---|
| Monday | 79% | 14 min |
| Tuesday | 89% | 6 min |
| Wednesday | 89% | 7 min |
| Thursday | 84% | 10 min |
| Friday | 82% | 11 min |
| Saturdaybest | 90% | 8 min |
| Sunday | 82% | 11 min |
What causes delays on this route
Share of total delay minutes by cause, as reported by carriers to the US DOT.
- Late-arriving aircraft47%
- Airline operations24%
- National airspace system26%
- Weather4%
Frequently asked questions
- How often are flights from GSP to BWI delayed?
- 15% of GSP–BWI 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 10 minutes.
- What is the best time of day to fly from GSP to BWI?
- Departures around 6 a.m. have the best record (95% on-time), while departures around 7 p.m. have the worst (58%). As on most US routes, delays accumulate through the day, so earlier flights are generally safer.
- How long is the flight from GSP to BWI?
- The scheduled GSP–BWI flight time averages 1h 31m over 426 miles. Actual arrival times vary — flights on this route land 15+ minutes late 15% of the time.
- How often are GSP to BWI 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 GSP to BWI?
- August 2024 was the roughest month in this dataset, with only 62% of arrivals on time. The best was September 2025 at 95%. If your dates are flexible, that 33-point gap is worth planning around.
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Based on 1,477 flights, 2024-07–2026-07. Source: US DOT Bureau of Transportation Statistics. Updated 2026-09-28.