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 4429 LANDED 3:21 PM ET, ~1 MIN LATE · SCHEDULED TIME UNKNOWN

Saturday, October 3 Yesterday

WN 4429 · MDW → BOS

took off 12:42 PM CT · landed 3:21 PM ET (scheduled time unknown)

Forecast issued Sat 10:00 PM ET · 8h after departure

Arrive at BOS more than 15 minutes late?

22% chance · ±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

↑ Arrivals into BOS at that hour are often late

↑ This flight has been late 15% of the time recently

↓ Mostly benign weather forecast at BOS

↓ Mostly benign weather forecast at MDW

Weather at each end

MDW (origin) Gusts20 kt Ceilingnone (clear) Visibility10+ mi Precipnone

BOS (destination) Gusts17 kt Ceiling5,500 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 4429 · MDW → BOS

Odds over time