Flight history · Aug 2025 – Jul 2026 · US DOT on-time records
WN 4126 · Greenville (GSP) → Baltimore (BWI)
Sold by Southwest. Still flying: 24 of the last 56 days (Mon, Thu, Fri).
Arrives on time62%within 15 minutes, of 26 flights
Cancelled0.0%of scheduled flights
An hour or more late8%of flights that operated
When late, on average39 minlate, among flights 15+ min late
Schedule
Typical times in the Jun 6 – Jul 31, 2026 schedule, local at each airport.
- Leaves GSP
- 13:55
- Arrives BWI
- 15:25
- Flight time
- 1h 30m
- Days flown, last 8 weeks
- 24 of 56
Each square is a day, Sat Jun 6 to Fri Jul 31, two weeks per row (each column is the same weekday); filled = flew.
How late it arrives
Share of flights that operated arriving more than this late.
Horizontal: minutes late at arrival (0 to 3 hours). Vertical: share of flights later than that.
Its hour at GSP
All flights leaving Greenville (GSP) at 1–2 pm, wherever they’re going: 81% left within 15 minutes and 1.4% were cancelled (656 flights in the year). Other Southwest flights on this route →
Upcoming forecasts
Our odds that this flight is late or cancelled on the days we publish.