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 2309 LANDED 8:22 PM PT, ~27 MIN LATE · SCHEDULED TIME UNKNOWN

QX 2309 · PUW → SEA

took off 7:24 PM PT · landed 8:22 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 0h before departure

Odds over time

Arrive at SEA more than 15 minutes late?
44% chance · ±1 pts +13 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% 1.1d 12h 6h Now Departs Lands