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 421 IN THE AIR (OFF 2:07 PM PT, ETA 8:50 PM ET) · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Today

WN 421 · LAS → PIT

took off 2:07 PM PT · expected to land 8:50 PM ET (scheduled time unknown)

Forecast issued Tue 4:00 PM ET · 1h before departure

Arrive at PIT more than 15 minutes late?

48% chance · ±4 pts +14 pts · 24h

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

What’s moving the odds

↑ 2pm departures from LAS are often late

↑ Mostly benign weather forecast at LAS

↑ LAS is prone to delays

↓ Tuesdays in September are usually quieter than average

↓ PIT usually runs smoothly

Weather at each end

LAS (origin) Gusts23 kt Ceiling4,700 ft Visibility7 mi Precip0.07 in

PIT (destination) Gusts6 kt Ceiling2,900 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 421 · LAS → PIT

Odds over time