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 3966 SCHEDULED · SCHEDULED TIME UNKNOWN

Wednesday, September 30 Yesterday

WN 3966 · BNA → BHM

departs 8:56 PM CT · arrives 9:27 PM CT

Forecast issued Wed 10:00 PM ET · 0h before departure

Arrive at BHM more than 15 minutes late?

23% chance · ±1 pts +0 pts · 24h

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

What’s moving the odds

↑ Later flights pick up delays from earlier in the day

↑ Other factors

↑ Arrivals into BHM at that hour are often late

↓ Wednesdays in September are usually quieter than average

↓ Mostly benign weather forecast at BNA

Weather at each end

BNA (origin) Gusts15 kt Ceilingnone (clear) Visibility10+ mi Precipnone

BHM (destination) Gusts8 kt Ceilingnone (clear) 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 3966 · BNA → BHM

Odds over time