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.

SKYWEST · FLIGHT OO 4020 LANDED 12:40 PM PT, ~8 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

OO 4020 · YVR → SEA

took off 11:57 AM PDT · landed 12:40 PM PT (scheduled time unknown)
Forecast issued Sat 10:00 PM ET · 7h after departure

Odds over time

Arrive at SEA more than 15 minutes late?
46% 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% 9h 6h Departs Lands