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 8511 SCHEDULED · SCHEDULED TIME UNKNOWN

Wednesday, September 30

WN 8511 · MKE → MDW

departs 9:17 PM CT · arrives 9:35 PM CT

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

Arrive at MDW more than 15 minutes late?

42% chance · ±1 pts – · 24h

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

What’s moving the odds

↑ Cloud base down to 700 ft, visibility down to 2.5 mi, 1.0 in of rain forecast at MDW that day

↑ Arrivals into MDW at that hour are often late

↑ Later flights pick up delays from earlier in the day

↓ Wednesdays in September are usually quieter than average

↓ MKE usually runs smoothly

Weather at each end

MKE (origin) Gusts11 kt Ceiling400 ft Visibility2 mi Precip0.42 in

MDW (destination) Gusts21 kt Ceiling700 ft Visibility2.5 mi Precip0.94 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 8511 · MKE → MDW

Odds over time