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.

DELTA · FLIGHT DL 1399 LANDED 9:02 AM ET, ~12 MIN LATE · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Yesterday

DL 1399 · BOS → BWI

took off 7:59 AM ET · landed 9:02 AM ET (scheduled time unknown)

Forecast issued Tue 10:00 PM ET · 14h after departure

Arrive at BWI more than 15 minutes late?

18% chance · ±0 pts −1 pt · 24h

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

What’s moving the odds

↑ Other factors

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

↑ BOS is busy at that time

↓ Arrivals into BWI at that hour are usually not late

↓ Early flights usually leave on time

Weather at each end

BOS (origin) Gusts11 kt Ceiling600 ft Visibility1.5 mi Precip0.03 in

BWI (destination) Gusts7 kt Ceiling3,600 ft Visibility9.2 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.

DL 1399 · BOS → BWI

Odds over time