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 1139
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 1139 · BWI → MDW
departs 10:00 AM ET · arrives 11:00 AM CT
Forecast issued Wed 1:00 PM ET · 3h after departure
Watch this flight
Other days
Today
Tue 10/6 9%
Odds over time
Arrive at MDW more than 15 minutes late?
22%
chance · ±0 pts
+1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
22%
Leave 15+ late
22%
Arrive 1h+ late
4%
Cancelled
4%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
1d
12h
6h
Departs
Lands
Now
Arrive at MDW more than 15 minutes late?
Calm-weather odds: 20% · changed +1 pt in 24h
+1 pt
22%
Yes 22%
No 78%
Leave BWI more than 15 minutes late?
Calm-weather odds: 20% · changed +5 pts in 24h
+5 pts
22%
Yes 22%
No 78%
Arrive at MDW more than an hour late?
Calm-weather odds: 3% · changed +2 pts in 24h
+2 pts
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: 4% · changed +2 pts in 24h
+2 pts
4%
Yes 4%
No 96%
How late will it get to MDW?
On time or early
75%
15–30 min late
11%
30 min–1 hour late
6%
1–2 hours late
3%
Over 2 hours late
<1%
Cancelled
4%
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, 0.9 in of rain forecast at MDW that day
↑
BWI is prone to delays
↑
This flight has been late 17% of the time recently
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at BWI
Weather at each end
BWI (origin)
Gusts 9 kt Ceiling 5,500 ft Visibility 10+ mi Precip none
MDW (destination)
Gusts 17 kt Ceiling 1,000 ft Visibility 2.5 mi Precip 0.87 in
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.