Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.

SOUTHWEST · FLIGHT WN 4027 SCHEDULED · TYPICAL SCHEDULE

Sunday, October 4

WN 4027 · DEN → SLC

departs 10:45 AM MT · arrives 12:15 PM MT

Forecast issued Fri 1:00 PM ET · 48h before departure

Arrive at SLC more than 15 minutes late?

13% chance · ±4 pts +2 pts · 24h

HOW SURE WE ARE Moderate. The odds now blend history with early weather forecasts.

How late will it get to SLC?

On time or early
87%
15–30 min late
6%
30 min–1 hour late
4%
1–2 hours late
1%
Over 2 hours late
<1%
Cancelled
<1%

Gate arrival compared with the scheduled arrival. The ranges add up to 100%.

What’s moving the odds

↑ DEN is busy at that time

↑ This flight has been late 21% of the time recently

↑ 10am departures from DEN are often late

↓ Gusts to 27 kt forecast at DEN that day

↓ Mostly benign weather forecast at SLC

Weather at each end

DEN (origin) Gusts27 kt Ceilingnone (clear) Visibility10+ mi Precipnone

SLC (destination) Gusts11 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 4027 · DEN → SLC

Odds over time

How late will it get to SLC?