Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4106
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
WN 4106 · BOS → MDW
departs 3:45 PM ET · arrives 5:30 PM CT
Forecast issued Tue 4:00 PM ET · 0h before departure
Watch this flight
Other days
Today
Wed 9/30 37%
Thu 10/1 42%
Fri 10/2 28%
Mon 10/5 28%
Odds over time
Arrive at MDW more than 15 minutes late?
28%
chance · ±1 pts
−4 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
28%
Leave 15+ late
38%
Arrive 1h+ late
5%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at MDW more than 15 minutes late?
Calm-weather odds: 27% · changed −4 pts in 24h
−4 pts
28%
Yes 28%
No 72%
Leave BOS more than 15 minutes late?
Calm-weather odds: 38% · changed −4 pts in 24h
−4 pts
38%
Yes 38%
No 62%
Arrive at MDW more than an hour late?
Calm-weather odds: 5% · changed −6 pts in 24h
−6 pts
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to MDW?
On time or early
72%
15–30 min late
12%
30 min–1 hour late
10%
1–2 hours late
4%
Over 2 hours late
1%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
3pm departures from BOS are often late
↑
Arrivals into MDW at that hour are often late
↑
BOS is prone to delays
↓
Mostly benign weather forecast at MDW
↓
Tuesdays in September are usually quieter than average
Weather at each end
BOS (origin)
Gusts 11 kt Ceiling 600 ft Visibility 1.5 mi Precip 0.01 in
MDW (destination)
Gusts 15 kt Ceiling none (clear) 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.