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.

UNITED · FLIGHT UA 1777 LANDED 1:58 PM PT, ~14 MIN LATE · SCHEDULED TIME UNKNOWN
Today

UA 1777 · SFO → LAS

took off 12:47 PM PT · landed 1:58 PM PT (scheduled time unknown)
Forecast issued Tue 3:00 PM ET · 1h before departure

Odds over time

Arrive at LAS more than 15 minutes late?
68% chance · ±0 pts +44 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 25% 50% 75% 100% 2.7d 2d 1d 12h 6h Now Departs Lands