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 821 SCHEDULED · SCHEDULED TIME UNKNOWN

Sunday, October 4 Today

UA 821 · HKG → LAX

departs 10:06 PM HKT · arrives 7:24 PM PT

Forecast issued Sun 7:00 AM ET · 3h before departure

Arrive at LAX more than 15 minutes late?

17% chance · ±0 pts +4 pts · 24h

HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.

What’s moving the odds

↑ Later flights pick up delays from earlier in the day

↑ Arrivals into LAX at that hour are often late

↑ UA's recent on-time record

↓ Other factors

↓ Mostly benign weather forecast at LAX

Weather at each end

HKG (origin) Gusts— Ceiling— Visibility— Precip—

LAX (destination) Gusts12 kt Ceilingnone (clear) 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.

UA 821 · HKG → LAX

Odds over time