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.

HORIZON · FLIGHT QX 2444 LANDED 4:34 PM MT, ~6 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

QX 2444 · SEA → GTF

took off 2:27 PM PT · landed 4:34 PM MT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 5h after departure

Odds over time

Arrive at GTF more than 15 minutes late?
31% chance · ±0 pts +7 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 10% 20% 30% 40% 1.1d 12h 6h Departs Lands