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 2904
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 2904 · MDW → STL
departs 5:10 PM CT · arrives 6:20 PM CT
Forecast issued Wed 7:00 PM ET · 1h after departure
Watch this flight
Other days
Today
Thu 10/1 64%
Fri 10/2 33%
Mon 10/5 18%
Tue 10/6 25%
Odds over time
Arrive at STL more than 15 minutes late?
42%
chance · ±0 pts
+1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
42%
Leave 15+ late
52%
Arrive 1h+ late
12%
Cancelled
2%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at STL more than 15 minutes late?
Calm-weather odds: 42% · changed +1 pt in 24h
+1 pt
42%
Yes 42%
No 58%
Leave MDW more than 15 minutes late?
Calm-weather odds: 52% · changed +1 pt in 24h
+1 pt
52%
Yes 52%
No 48%
Arrive at STL more than an hour late?
Calm-weather odds: 11% · changed +2 pts in 24h
+2 pts
12%
Yes 12%
No 88%
Cancelled?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
How late will it get to STL?
On time or early
57%
15–30 min late
13%
30 min–1 hour late
16%
1–2 hours late
9%
Over 2 hours late
3%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 800 ft, visibility down to 2.5 mi, 0.8 in of rain forecast at MDW that day
↑
5pm departures from MDW are often late
↑
Later flights pick up delays from earlier in the day
↓
Wednesdays in September are usually quieter than average
↓
STL usually runs smoothly
Weather at each end
MDW (origin)
Gusts 21 kt Ceiling 700 ft Visibility 2.5 mi Precip 0.94 in
STL (destination)
Gusts 20 kt Ceiling 9,000 ft 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.