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 4154
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
WN 4154 · PHL → MDW
departs 7:25 AM ET · arrives 8:30 AM CT
Forecast issued Tue 10:00 PM ET · 15h after departure
Watch this flight
Other days
Today
Wed 9/30 19%
Odds over time
Arrive at MDW more than 15 minutes late?
12%
chance · ±0 pts
−1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
12%
Leave 15+ late
9%
Arrive 1h+ late
2%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at MDW more than 15 minutes late?
Calm-weather odds: 12% · changed −1 pt in 24h
−1 pt
12%
Yes 12%
No 88%
Leave PHL more than 15 minutes late?
Calm-weather odds: 9% · changed −2 pts in 24h
−2 pts
9%
Yes 9%
No 91%
Arrive at MDW more than an hour late?
Calm-weather odds: 2% · changed −1 pt in 24h
−1 pt
2%
Yes 2%
No 98%
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
87%
15–30 min late
8%
30 min–1 hour late
3%
1–2 hours late
1%
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
↑
PHL is prone to delays
↑
This flight has been late 17% of the time recently
↑
PHL is busy at that time
↓
Early flights usually leave on time
↓
Tuesdays in September are usually quieter than average
Weather at each end
PHL (origin)
Gusts 17 kt Ceiling 1,500 ft Visibility 10+ mi Precip none
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.