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 2138 LANDED 1:22 PM PT, ~6 MIN LATE · SCHEDULED TIME UNKNOWN

QX 2138 · SFO → GEG

took off 11:41 AM PT · landed 1:22 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 7h after departure

Odds over time

Arrive at GEG more than 15 minutes late?
33% chance · ±0 pts +4 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% 12h 6h Departs Lands