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 3977 LANDED 7:33 AM MT, ~13 MIN LATE · SCHEDULED TIME UNKNOWN

Saturday, October 3 Yesterday

WN 3977 · COS → DEN

took off 7:11 AM MT · landed 7:33 AM MT (scheduled time unknown)

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

Arrive at DEN more than 15 minutes late?

6% chance · ±0 pts – · 24h

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

What’s moving the odds

↑ Other factors

↑ DEN is busy at that time

↓ Early flights usually leave on time

↓ WN's recent on-time record

Weather at each end

COS (origin) Gusts25 kt Ceilingnone (clear) Visibility10+ mi Precipnone

DEN (destination) Gusts27 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 3977 · COS → DEN

Odds over time