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 2566 LANDED 1:13 PM PT, ~8 MIN LATE · SCHEDULED TIME UNKNOWN
Today

QX 2566 · SFO → PAE

took off 11:32 AM PT · landed 1:13 PM PT (scheduled time unknown)
Forecast issued Mon 10:00 PM ET · 7h after departure

Odds over time

Arrive at PAE more than 15 minutes late?
28% chance · ±0 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
LIVE IN THE AIR 0% 15% 30% 45% 60% 4h Departs Lands