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 4373 LANDED 8:44 PM PT, ~4 MIN LATE · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Yesterday

WN 4373 · PHX → SAN

took off 7:56 PM MT · landed 8:44 PM PT (scheduled time unknown)

Forecast issued Tue 10:00 PM ET · 1h before departure

Arrive at SAN more than 15 minutes late?

68% chance · ±0 pts +5 pts · 24h

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

What’s moving the odds

↑ Cloud base down to 1,300 ft, visibility down to 0.5 mi, 0.3 in of rain, thunderstorms forecast at PHX that day

↑ 7pm departures from PHX are often late

↑ Later flights pick up delays from earlier in the day

↓ Tuesdays in September are usually quieter than average

↓ Mostly benign weather forecast at SAN

Weather at each end

PHX (origin) Gusts21 kt Ceiling1,300 ft Visibility0.5 mi Precip0.34 in

SAN (destination) Gusts22 kt Ceiling1,700 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 4373 · PHX → SAN

Odds over time