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 800 IN THE AIR (OFF 7:32 AM CT, ETA 8:40 AM MT) · SCHEDULED TIME UNKNOWN
Today

WN 800 · MDW → PHX

took off 7:32 AM CT · expected to land 8:40 AM MT (scheduled time unknown)
Forecast issued Sun 7:00 AM ET · 2h before departure

Odds over time

Arrive at PHX more than 15 minutes late?
14% chance · ±0 pts +6 pts · 24h
HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.
WEATHER FORECASTS LIVE IN THE AIR 0% 5% 10% 15% 20% 1.1d 12h 6h Now Departs Lands