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 577 LANDED 10:23 AM ET, ~9 MIN LATE · SCHEDULED TIME UNKNOWN

Sunday, October 4 Yesterday

UA 577 · STL → EWR

took off 7:39 AM CT · landed 10:23 AM ET (scheduled time unknown)

Forecast issued Sun 10:00 PM ET · 13h after departure

Arrive at EWR more than 15 minutes late?

22% chance · ±0 pts +14 pts · 24h

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

What’s moving the odds

↑ EWR is prone to delays

↑ UA's recent on-time record

↑ Mostly benign weather forecast at EWR

↓ Early flights usually leave on time

↓ Mostly benign weather forecast at STL

Weather at each end

STL (origin) Gusts16 kt Ceilingnone (clear) Visibility10+ mi Precipnone

EWR (destination) Gusts19 kt Ceiling600 ft Visibility2.5 mi Precip0.11 in

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 577 · STL → EWR

Odds over time