Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4066
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
WN 4066 · PHX → MDW
departs 12:20 PM MT · arrives 5:35 PM CT
Forecast issued Tue 10:00 PM ET · 7h after departure
Watch this flight
Other days
Tue 9/29
Today 41%
Thu 10/1 18%
Fri 10/2 20%
Sat 10/3 19%
Sun 10/4 18%
Mon 10/5 18%
Tue 10/6 26%
Odds over time
Arrive at MDW more than 15 minutes late?
31%
chance · ±0 pts
−2 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
31%
Leave 15+ late
50%
Arrive 1h+ late
10%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at MDW more than 15 minutes late?
Calm-weather odds: 30% · changed −2 pts in 24h
−2 pts
31%
Yes 31%
No 69%
Leave PHX more than 15 minutes late?
Calm-weather odds: 48% · changed +2 pts in 24h
+2 pts
50%
Yes 50%
No 50%
Arrive at MDW more than an hour late?
Calm-weather odds: 9% · changed +3 pts in 24h
+3 pts
10%
Yes 10%
No 90%
Cancelled?
Calm-weather odds: 1% · changed +0 pts in 24h
+0 pts
1%
Yes 1%
No 99%
How late will it get to MDW?
On time or early
68%
15–30 min late
9%
30 min–1 hour late
12%
1–2 hours late
8%
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
↑
Cloud base down to 1,300 ft, visibility down to 0.5 mi, 0.3 in of rain, thunderstorms forecast at PHX that day
↑
Arrivals into MDW at that hour are often late
↑
12pm departures from PHX are often late
↓
Tuesdays in September are usually quieter than average
↓
MDW usually runs smoothly
Weather at each end
PHX (origin)
Gusts 21 kt Ceiling 1,300 ft Visibility 0.5 mi Precip 0.34 in
MDW (destination)
Gusts 15 kt Ceiling none (clear) Visibility 10+ 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.