WN 8631 · STL → MDW

departs 9:02 PM CT · arrives 10:21 PM CT

Forecast issued Wed 5:00 PM ET · 5h before departure

Arrive at MDW more than 15 minutes late?

37% chance · ±0 pts – · 24h

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

How late will it get to MDW?

On time or early
63%
15–30 min late
19%
30 min–1 hour late
3%
1–2 hours late
12%
Over 2 hours late
2%
Cancelled
<1%

Gate arrival compared with the scheduled arrival. The ranges add up to 100%.

What’s moving the odds

↑ Cloud base down to 800 ft, visibility down to 2.5 mi, 0.9 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

↓ STL usually runs smoothly

Weather at each end

STL (origin) Gusts14 kt Ceiling9,000 ft Visibility10+ mi Precipnone

MDW (destination) Gusts19 kt Ceiling800 ft Visibility2.5 mi Precip0.92 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 8631 · STL → MDW

Odds over time

How late will it get to MDW?