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 4526 LANDED 5:01 PM ET, ~4 MIN LATE · SCHEDULED TIME UNKNOWN
Today

WN 4526 · BWI → PWM

took off 3:55 PM ET · landed 5:01 PM ET (scheduled time unknown)
Forecast issued Tue 7:00 PM ET · 3h after departure

Odds over time

Arrive at PWM more than 15 minutes late?
26% 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% 12h 6h Departs Lands