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 4555 LANDED 5:44 PM ET, ~6 MIN LATE · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Today

WN 4555 · LAS → DCA

took off 10:31 AM PT · landed 5:44 PM ET (scheduled time unknown)

Forecast issued Tue 9:00 PM ET · 8h after departure

Arrive at DCA more than 15 minutes late?

37% chance · ±0 pts – · 24h

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

What’s moving the odds

↑ Gusts to 27 kt forecast at LAS that day

↑ LAS is prone to delays

↑ Arrivals into DCA at that hour are often late

↓ Tuesdays in September are usually quieter than average

↓ Mostly benign weather forecast at DCA

Weather at each end

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

DCA (destination) Gusts7 kt Ceiling4,000 ft Visibility9.5 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 4555 · LAS → DCA

Odds over time