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 544 LANDED 12:03 AM ET, ~9 MIN LATE · SCHEDULED TIME UNKNOWN

WN 544 · MDW → FLL

took off 8:33 PM CT · landed 12:03 AM ET (scheduled time unknown)
Forecast issued Fri 10:00 PM ET · 0h before departure

Odds over time

Arrive at FLL more than 15 minutes late?
42% chance · ±1 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 15% 30% 45% 60% 2h Departs Lands