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.

ENVOY · FLIGHT MQ 9872 LANDED 9:00 PM ET, ~17 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

MQ 9872 · DFW → BOS

took off 5:01 PM CT · landed 9:00 PM ET (scheduled time unknown)
Forecast issued Tue 11:00 PM ET · 5h after departure

Odds over time

Arrive at BOS more than 15 minutes late?
27% 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% 1h Departs Lands