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.

SOUTHWEST · FLIGHT WN 1903 LANDED 8:54 PM PT, ~5 MIN LATE · SCHEDULED TIME UNKNOWN

WN 1903 · FAT → SAN

took off 8:04 PM PT · landed 8:54 PM PT (scheduled time unknown)
Forecast issued Fri 10:00 PM ET · 1h before departure

Odds over time

Arrive at SAN more than 15 minutes late?
39% chance · ±1 pts – · 24h
HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.
LIVE IN THE AIR 0% 15% 30% 45% 60% Now Departs Lands