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 2099 LANDED 8:40 AM MT, ~1 MIN LATE · SCHEDULED TIME UNKNOWN

QX 2099 · GEG → BOI

took off 6:58 AM PT · landed 8:40 AM MT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 12h after departure

Odds over time

Arrive at BOI more than 15 minutes late?
9% chance · ±0 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% 5h Departs Lands