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 8500 IN THE AIR (OFF 2:58 PM PT, ETA 5:40 PM MT) · SCHEDULED TIME UNKNOWN

Sunday, October 4 Today

WN 8500 · ONT → DEN

took off 2:58 PM PT · expected to land 5:40 PM MT (scheduled time unknown)

Forecast issued Sun 4:00 PM ET · 2h before departure

Arrive at DEN more than 15 minutes late?

39% chance · ±0 pts – · 24h

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

What’s moving the odds

↑ Arrivals into DEN at that hour are often late

↑ Other factors

↑ 2pm departures from ONT are often late

↓ Sundays in October are usually quieter than average

↓ Mostly benign weather forecast at DEN

Weather at each end

ONT (origin) Gusts18 kt Ceilingnone (clear) Visibility10+ mi Precipnone

DEN (destination) Gusts24 kt Ceiling7,500 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 8500 · ONT → DEN

Odds over time