Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4012
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 4012 · DEN → PIT
departs 10:30 AM MT · arrives 3:35 PM ET
Forecast issued Wed 11:00 AM ET · 2h before departure
Watch this flight
Other days
Today
Thu 10/1 16%
Fri 10/2 16%
Sat 10/3 14%
Sun 10/4 15%
Mon 10/5 14%
Tue 10/6 14%
Odds over time
Arrive at PIT more than 15 minutes late?
20%
chance · ±0 pts
−13 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
20%
Leave 15+ late
22%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.8d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at PIT more than 15 minutes late?
Calm-weather odds: 14% · changed −13 pts in 24h
−13 pts
20%
Yes 20%
No 80%
Leave DEN more than 15 minutes late?
Calm-weather odds: 13% · changed −7 pts in 24h
−7 pts
22%
Yes 22%
No 78%
Arrive at PIT more than an hour late?
Calm-weather odds: 2% · changed −2 pts in 24h
−2 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 100%
How late will it get to PIT?
On time or early
80%
15–30 min late
11%
30 min–1 hour late
6%
1–2 hours late
2%
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 24% of the time recently
↑
10am departures from DEN are often late
↓
Wednesdays in September are usually quieter than average
↓
PIT usually runs smoothly
Weather at each end
DEN (origin)
Gusts 18 kt Ceiling 6,000 ft Visibility 10+ mi Precip 0.06 in
PIT (destination)
Gusts 9 kt Ceiling 100 ft Visibility 0.13 mi Precip none
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.