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 4355 SCHEDULED · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Today

WN 4355 · PHX → LAS

departs 8:08 PM MT · arrives 8:47 PM PT

Forecast issued Tue 8:00 PM ET · 3h before departure

Arrive at LAS more than 15 minutes late?

58% chance · ±4 pts +7 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

↑ Arrivals into LAS at that hour are often late

↑ 8pm departures from PHX are often late

↓ Tuesdays in September are usually quieter than average

Weather at each end

PHX (origin) Gusts21 kt Ceiling1,300 ft Visibility0.5 mi Precip0.33 in

LAS (destination) Gusts27 kt Ceiling4,700 ft Visibility7 mi Precip0.08 in

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 4355 · PHX → LAS

Odds over time