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 2016 LANDED 6:18 PM PT, ~15 MIN LATE · SCHEDULED TIME UNKNOWN
Today

QX 2016 · YVR → SEA

took off 5:47 PM PDT · landed 6:18 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 1h after departure

Odds over time

Arrive at SEA more than 15 minutes late?
37% chance · ±0 pts −2 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 15% 30% 45% 60% 1.0d 12h 6h Departs Now