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.

FRONTIER · FLIGHT F9 4130 SCHEDULED · SCHEDULED TIME UNKNOWN
Today

F9 4130 · LAX → SLC

departs 11:40 AM PT · arrives 2:07 PM MT
Your aircraft is N675FR (A21N), coming in as F9 2133 from PHX: in the air, landing about 10:17 AM PT, 72 min before departure.
Forecast issued Tue 12:00 PM ET · 3h before departure

Odds over time

Arrive at SLC more than 15 minutes late?
19% chance · ±0 pts – · 24h
HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.
LIVE IN THE AIR 0% 10% 20% 30% 40% Now Departs Lands