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 4099 LANDED 6:28 PM ET, ~12 MIN LATE · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Today

WN 4099 · IND → BWI

took off 5:07 PM ET · landed 6:28 PM ET (scheduled time unknown)

Forecast issued Tue 6:00 PM ET · 1h after departure

Arrive at BWI more than 15 minutes late?

27% chance · ±0 pts +3 pts · 24h

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

What’s moving the odds

↑ Arrivals into BWI at that hour are often late

↑ Other factors

↑ Later flights pick up delays from earlier in the day

↓ Tuesdays in September are usually quieter than average

↓ Mostly benign weather forecast at IND

Weather at each end

IND (origin) Gusts6 kt Ceilingnone (clear) Visibility10+ mi Precipnone

BWI (destination) Gusts7 kt Ceiling3,600 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 4099 · IND → BWI

Odds over time