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.

UNITED · FLIGHT UA 599 LANDED 4:44 PM ET, ~9 MIN LATE · SCHEDULED TIME UNKNOWN

Tuesday, September 29

UA 599 · SFO → IAD

took off 9:01 AM PT · landed 4:44 PM ET (scheduled time unknown)

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

Arrive at IAD more than 15 minutes late?

18% chance · ±0 pts +2 pts · 24h

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

What’s moving the odds

↑ Other factors

↑ SFO is prone to delays

↑ Arrivals into IAD at that hour are often late

↓ Mostly benign weather forecast at SFO

↓ Tuesdays in September are usually quieter than average

Weather at each end

SFO (origin) Gusts19 kt Ceilingnone (clear) Visibility10+ mi Precipnone

IAD (destination) Gusts9 kt Ceiling4,200 ft Visibility8.8 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.

UA 599 · SFO → IAD

Odds over time