Schedule: a typical Friday (the flights of Jul 31, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 1899
SCHEDULED · TYPICAL SCHEDULE
WN 1899 · GSP → BWI
departs 8:30 AM ET · arrives 9:55 AM ET
Forecast issued Wed 12:00 PM ET · 44h before departure
Odds over time
Arrive at BWI more than 15 minutes late?
7%
chance · ±1 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
-
-
-
-
How late will it get to BWI?
-
On time or early
92%
-
15–30 min late
4%
-
30 min–1 hour late
1%
-
1–2 hours late
1%
-
Over 2 hours late
<1%
-
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.