Schedule: a typical summer Tuesday (the flights of Jul 28, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4948
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29
WN 4948 · MDW → PHL
departs 3:40 PM CT · arrives 6:40 PM ET
Forecast issued Tue 10:00 PM ET · 5h after departure
Watch this flight
Other days
Tue 9/29
Today 42%
Mon 10/5 20%
Fri 10/9 22%
Odds over time
Arrive at PHL more than 15 minutes late?
25%
chance · ±0 pts
+0 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
25%
Leave 15+ late
27%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at PHL more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
25%
Yes 25%
No 75%
Leave MDW more than 15 minutes late?
Calm-weather odds: 28% · changed −2 pts in 24h
−2 pts
27%
Yes 27%
No 73%
Arrive at PHL more than an hour late?
Calm-weather odds: 6% · changed +1 pt in 24h
+1 pt
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to PHL?
On time or early
74%
15–30 min late
11%
30 min–1 hour late
7%
1–2 hours late
5%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Arrivals into PHL at that hour are often late
↑
WN's recent on-time record
↑
PHL is prone to delays
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at MDW
Weather at each end
MDW (origin)
Gusts 15 kt Ceiling none (clear) Visibility 10+ mi Precip none
PHL (destination)
Gusts 17 kt Ceiling 1,500 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.