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 4971 IN THE AIR (OFF 3:15 PM MT, ETA 8:23 PM ET) · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Today

WN 4971 · DEN → PHL

took off 3:15 PM MT · expected to land 8:23 PM ET (scheduled time unknown)

Forecast issued Tue 4:00 PM ET · 1h before departure

Arrive at PHL more than 15 minutes late?

35% chance · ±2 pts −3 pts · 24h

HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.

What’s moving the odds

↑ This flight has been late 35% of the time recently

↑ 3pm departures from DEN are often late

↑ DEN is busy at that time

↓ 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

PHL (destination) Gusts10 kt Ceiling1,500 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 4971 · DEN → PHL

Odds over time