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 3815 LANDED 5:24 PM MT, ~8 MIN LATE · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Yesterday

WN 3815 · DEN → SLC

took off 4:24 PM MT · landed 5:24 PM MT (scheduled time unknown)

Forecast issued Tue 10:00 PM ET · 4h after departure

Arrive at SLC more than 15 minutes late?

35% chance · ±0 pts −4 pts · 24h

HOW SURE WE ARE Very high. The odds now come almost entirely from live conditions.

What’s moving the odds

↑ Other factors

↑ 4pm departures from DEN are often late

↑ This flight has been late 28% of the time recently

↓ Tuesdays in September are usually quieter than average

↓ Mostly benign weather forecast at DEN

Weather at each end

DEN (origin) Gusts9 kt Ceiling6,000 ft Visibility10+ 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 3815 · DEN → SLC

Odds over time