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 1539 IN THE AIR (OFF 5:11 PM MT, ETA 10:19 PM ET) · SCHEDULED TIME UNKNOWN

Tuesday, September 29 Today

WN 1539 · DEN → LGA

took off 5:11 PM MT · expected to land 10:19 PM ET (scheduled time unknown)

Forecast issued Tue 8:00 PM ET · 1h after departure

Arrive at LGA more than 15 minutes late?

56% chance · ±3 pts +5 pts · 24h

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

What’s moving the odds

↑ Arrivals into LGA at that hour are often late

↑ 5pm departures from DEN are often late

↑ This flight has been late 35% of the time recently

↓ Mostly benign weather forecast at DEN

↓ Tuesdays in September are usually quieter than average

Weather at each end

DEN (origin) Gusts9 kt Ceiling6,000 ft Visibility10+ mi Precipnone

LGA (destination) Gusts11 kt Ceiling1,600 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 1539 · DEN → LGA

Odds over time