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.

DELTA · FLIGHT DL 1053 LANDED 12:49 PM PT, ~16 MIN LATE · SCHEDULED TIME UNKNOWN

DL 1053 · SFO → SEA

took off 10:59 AM PT · landed 12:49 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 8h after departure

Odds over time

Arrive at SEA more than 15 minutes late?
48% chance · ±0 pts +10 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 20% 40% 60% 80% 20h 12h 6h Departs Lands