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 2339 LANDED 9:34 AM PT, ~10 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

QX 2339 · SJC → SAN

took off 8:27 AM PT · landed 9:34 AM PT (scheduled time unknown)
Forecast issued Wed 6:00 PM ET · 6h after departure

Odds over time

Arrive at SAN more than 15 minutes late?
38% chance · ±0 pts +15 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 Lands