Tracked live by the FAA, but its flight plan was first seen after takeoff, so we don't know the scheduled time and can't say whether it's late.

SOUTHWEST · FLIGHT WN 2953 LANDED 2:56 PM ET, ~3 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 2953 · MDW → PHL

took off 12:37 PM CT · landed 2:56 PM ET (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 8h after departure

Odds over time

Arrive at PHL more than 15 minutes late?
30% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 10h 6h Departs Lands