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.

SKYWEST · FLIGHT OO 3128 LANDED 6:49 PM PT, ~6 MIN LATE · SCHEDULED TIME UNKNOWN
Yesterday

OO 3128 · SEA → EUG

took off 6:02 PM PT · landed 6:49 PM PT (scheduled time unknown)
Forecast issued Tue 10:00 PM ET · 1h after departure

Odds over time

Arrive at EUG more than 15 minutes late?
27% chance · ±0 pts +3 pts · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
WEATHER FORECASTS LIVE IN THE AIR 0% 10% 20% 30% 40% 1.0d 12h 6h Departs Lands