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 251
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 251 · MDW → ATL
departs 3:55 PM CT · arrives 6:50 PM ET
Forecast issued Wed 2:00 PM ET · 3h before departure
Watch this flight
Other days
Today
Sat 10/3 20%
Sun 10/4 26%
Tue 10/6 20%
Odds over time
Arrive at ATL more than 15 minutes late?
53%
chance · ±0 pts
+25 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
53%
Leave 15+ late
63%
Arrive 1h+ late
10%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.9d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 45% · changed +25 pts in 24h
+25 pts
53%
Yes 53%
No 47%
Leave MDW more than 15 minutes late?
Calm-weather odds: 52% · changed +26 pts in 24h
+26 pts
63%
Yes 63%
No 37%
Arrive at ATL more than an hour late?
Calm-weather odds: 12% · changed +0 pts in 24h
+0 pts
10%
Yes 10%
No 90%
Cancelled?
Calm-weather odds: 1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 100%
How late will it get to ATL?
On time or early
47%
15–30 min late
22%
30 min–1 hour late
20%
1–2 hours late
6%
Over 2 hours late
4%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 1,000 ft, visibility down to 2.5 mi, 1.1 in of rain forecast at MDW that day
↑
3pm departures from MDW are often late
↑
Arrivals into ATL at that hour are often late
↓
Wednesdays in September are usually quieter than average
↓
Cloud base down to 200 ft, visibility down to 0.5 mi forecast at ATL that day
Weather at each end
MDW (origin)
Gusts 16 kt Ceiling 1,000 ft Visibility 2.5 mi Precip 1.08 in
ATL (destination)
Gusts 10 kt Ceiling 200 ft Visibility 0.5 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.