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 3556 LANDED 1:21 AM MT, ~30 MIN LATE · SCHEDULED TIME UNKNOWN

Sunday, October 4 Yesterday

WN 3556 · PHX → COS

took off 11:10 PM MT · landed 1:21 AM MT (scheduled time unknown)

Forecast issued Sun 10:00 PM ET · 4h before departure

Arrive at COS more than 15 minutes late?

53% chance · ±0 pts +21 pts · 24h

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

What’s moving the odds

↑ 10pm departures from PHX are often late

↑ WN's recent on-time record

↑ Later flights pick up delays from earlier in the day

↓ Gusts to 26 kt forecast at COS that day

↓ Sundays in October are usually quieter than average

Weather at each end

PHX (origin) Gusts33 kt Ceilingnone (clear) Visibility10+ mi Precipnone

COS (destination) Gusts26 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.

WN 3556 · PHX → COS

Odds over time