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 324 LANDED 12:25 PM ET, ~3 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

WN 324 · DAL → BOS

took off 8:25 AM CT · landed 12:25 PM ET (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 13h after departure

Odds over time

Arrive at BOS more than 15 minutes late?
18% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 10% 20% 30% 40% 5h Departs Lands