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 1450 LANDED 8:37 PM MT, ~7 MIN LATE · SCHEDULED TIME UNKNOWN

WN 1450 · LGB → SLC

took off 6:16 PM PT · landed 8:37 PM MT (scheduled time unknown)
Forecast issued Fri 10:00 PM ET · 1h after departure

Odds over time

Arrive at SLC more than 15 minutes late?
34% chance · ±1 pts – · 24h
HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.
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