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 4113
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Yesterday
WN 4113 · MDW → GRR
departs 9:55 PM CT · arrives 11:55 PM ET
Forecast issued Wed 10:00 PM ET · 1h before departure
Watch this flight
Other days
Wed 9/30
Today 56%
Fri 10/2 28%
Sun 10/4 29%
Mon 10/5 19%
Tue 10/6 27%
Wed 10/7 20%
Odds over time
Arrive at GRR more than 15 minutes late?
41%
chance · ±1 pts
+0 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
41%
Leave 15+ late
55%
Arrive 1h+ late
12%
Cancelled
3%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
25%
50%
75%
100%
2.9d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 41% · changed +0 pts in 24h
+0 pts
41%
Yes 41%
No 59%
Leave MDW more than 15 minutes late?
Calm-weather odds: 55% · changed −4 pts in 24h
−4 pts
55%
Yes 55%
No 45%
Arrive at GRR more than an hour late?
Calm-weather odds: 10% · changed −2 pts in 24h
−2 pts
12%
Yes 12%
No 88%
Cancelled?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
How late will it get to GRR?
On time or early
57%
15–30 min late
13%
30 min–1 hour late
15%
1–2 hours late
10%
Over 2 hours late
1%
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 700 ft, visibility down to 2.5 mi, 1.0 in of rain forecast at MDW that day
↑
9pm departures from MDW are often late
↑
Cloud base down to 600 ft, visibility down to 1.25 mi, 0.3 in of rain forecast at GRR that day
↓
Wednesdays in September are usually quieter than average
↓
GRR usually runs smoothly
Weather at each end
MDW (origin)
Gusts 21 kt Ceiling 700 ft Visibility 2.5 mi Precip 0.94 in
GRR (destination)
Gusts 11 kt Ceiling 600 ft Visibility 1.25 mi Precip 0.35 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.