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 3747 LANDED 10:40 PM MT, ~2 MIN LATE · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Yesterday

WN 3747 · SMF → SLC

took off 8:25 PM PT · landed 10:40 PM MT (scheduled time unknown)

Forecast issued Tue 10:00 PM ET · 2h before departure

Arrive at SLC more than 15 minutes late?

26% chance · ±1 pts −4 pts · 24h

HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.

What’s moving the odds

↑ Other factors

↑ Later flights pick up delays from earlier in the day

↑ WN's recent on-time record

↓ Tuesdays in September are usually quieter than average

↓ Mostly benign weather forecast at SLC

Weather at each end

SMF (origin) Gusts23 kt Ceilingnone (clear) Visibility9 mi Precipnone

SLC (destination) Gusts15 kt Ceiling6,500 ft Visibility10+ mi Precipnone

How this resolves

Yes if the gate arrival is more than 15 minutes after the scheduled arrival. Cancelled or diverted flights resolve N/A.

Every question here is display only — there is no betting or money involved. Gate times come from the airline; a cancellation resolves only the “Cancelled?” question, and a diversion voids the delay questions.

WN 3747 · SMF → SLC

Odds over time