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 3975 LANDED 4:20 PM MT, ~13 MIN LATE · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Today

WN 3975 · SFO → PHX

took off 2:52 PM PT · landed 4:20 PM MT (scheduled time unknown)

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

Arrive at PHX more than 15 minutes late?

46% 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

↑ 2pm departures from SFO are often late

↑ Other factors

↑ This flight has been late 38% of the time recently

↓ Tuesdays in September are usually quieter than average

↓ Mostly benign weather forecast at SFO

Weather at each end

SFO (origin) Gusts19 kt Ceilingnone (clear) Visibility10+ mi Precipnone

PHX (destination) Gusts21 kt Ceiling1,300 ft Visibility0.5 mi Precip0.34 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 3975 · SFO → PHX

Odds over time