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 4948
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 4948 · MDW → PHL
departs 3:40 PM CT · arrives 6:40 PM ET
Forecast issued Wed 7:00 AM ET · 10h before departure
Watch this flight
Other days
Today
Thu 10/1 42%
Fri 10/2 31%
Sun 10/4 27%
Mon 10/5 23%
Tue 10/6 20%
Odds over time
Arrive at PHL more than 15 minutes late?
42%
chance · ±3 pts
+11 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
42%
Leave 15+ late
45%
Arrive 1h+ late
9%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.9d
2d
1d
12h
Now
6h
Departs
Lands
Arrive at PHL more than 15 minutes late?
Calm-weather odds: 20% · changed +11 pts in 24h
+11 pts
42%
Yes 42%
No 58%
Leave MDW more than 15 minutes late?
Calm-weather odds: 30% · changed +11 pts in 24h
+11 pts
45%
Yes 45%
No 55%
Arrive at PHL more than an hour late?
Calm-weather odds: 3% · changed +1 pt in 24h
+1 pt
9%
Yes 9%
No 91%
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
57%
15–30 min late
20%
30 min–1 hour late
13%
1–2 hours late
6%
Over 2 hours late
3%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 800 ft, 0.6 in of rain forecast at MDW that day
↑
Arrivals into PHL at that hour are often late
↑
3pm departures from MDW are often late
↓
Mostly benign weather forecast at PHL
↓
Wednesdays in September are usually quieter than average
Weather at each end
MDW (origin)
Gusts 20 kt Ceiling 800 ft Visibility 3 mi Precip 0.56 in
PHL (destination)
Gusts 8 kt Ceiling 4,500 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.