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 370 LANDED 1:53 AM ET, ~10 MIN LATE · SCHEDULED TIME UNKNOWN
Today

WN 370 · MCO → MIA

took off 1:11 AM ET · landed 1:53 AM ET (scheduled time unknown)
Forecast issued Mon 11:00 AM ET · 10h after departure

Odds over time

Arrive at MIA more than 15 minutes late?
11% chance · ±1 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 5% 10% 15% 20% 4h Departs Lands