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 4250
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 4250 · MDW → MHT
departs 6:05 PM CT · arrives 9:20 PM ET
Forecast issued Wed 7:00 PM ET · 0h before departure
Watch this flight
Other days
Today
Thu 10/1 54%
Fri 10/2 35%
Sat 10/3 28%
Sun 10/4 31%
Mon 10/5 27%
Tue 10/6 34%
Odds over time
Arrive at MHT more than 15 minutes late?
40%
chance · ±1 pts
+4 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
40%
Leave 15+ late
59%
Arrive 1h+ late
9%
Cancelled
2%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at MHT more than 15 minutes late?
Calm-weather odds: 39% · changed +4 pts in 24h
+4 pts
40%
Yes 40%
No 60%
Leave MDW more than 15 minutes late?
Calm-weather odds: 58% · changed +2 pts in 24h
+2 pts
59%
Yes 59%
No 41%
Arrive at MHT more than an hour late?
Calm-weather odds: 9% · changed +0 pts in 24h
+0 pts
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
How late will it get to MHT?
On time or early
59%
15–30 min late
13%
30 min–1 hour late
17%
1–2 hours late
5%
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
↑
6pm departures from MDW are often late
↑
Cloud base down to 800 ft, visibility down to 2.5 mi, 0.8 in of rain forecast at MDW that day
↑
Later flights pick up delays from earlier in the day
↓
Wednesdays in September are usually quieter than average
↓
Cloud base down to 1,400 ft forecast at MHT that day
Weather at each end
MDW (origin)
Gusts 21 kt Ceiling 700 ft Visibility 2.5 mi Precip 0.94 in
MHT (destination)
Gusts 6 kt Ceiling 1,400 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.