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 4129 LANDED 12:44 PM CT, ON TIME · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Yesterday

WN 4129 · DCA → MDW

took off 12:16 PM ET · landed 12:44 PM CT (scheduled time unknown)

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

Arrive at MDW more than 15 minutes late?

25% chance · ±0 pts – · 24h

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

What’s moving the odds

↑ 12pm departures from DCA are often late

↑ Other factors

↑ DCA is busy at that time

↓ Tuesdays in September are usually quieter than average

↓ Mostly benign weather forecast at DCA

Weather at each end

DCA (origin) Gusts7 kt Ceiling4,000 ft Visibility9.6 mi Precipnone

MDW (destination) Gusts15 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 4129 · DCA → MDW

Odds over time