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 3811 LANDED 8:31 AM ET, ~8 MIN LATE · SCHEDULED TIME UNKNOWN

Wednesday, September 30

WN 3811 · STL → BWI

took off 5:53 AM CT · landed 8:31 AM ET (scheduled time unknown)

Forecast issued Wed 10:00 PM ET · 15h after departure

Arrive at BWI more than 15 minutes late?

4% chance · ±0 pts +0 pts · 24h

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

What’s moving the odds

↑ Other factors

↓ Early flights usually leave on time

↓ Arrivals into BWI at that hour are usually not late

Weather at each end

STL (origin) Gusts20 kt Ceiling9,000 ft Visibility10+ mi Precipnone

BWI (destination) Gusts7 kt Ceiling4,900 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 3811 · STL → BWI

Odds over time