Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 1355
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 1355 · MDW → PHL
departs 9:05 AM CT · arrives 12:05 PM ET
Forecast issued Fri 10:00 PM ET · 36h before departure
Watch this flight
Other days
Today 8%
Sat 10/3 10%
Sun 10/4
Mon 10/5 7%
Odds over time
Arrive at PHL more than 15 minutes late?
15%
chance · ±1 pts
+4 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
15%
Leave 15+ late
13%
Arrive 1h+ late
3%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.5d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at PHL more than 15 minutes late?
Calm-weather odds: 6% · changed +4 pts in 24h
+4 pts
15%
Yes 15%
No 85%
Leave MDW more than 15 minutes late?
Calm-weather odds: 8% · changed +0 pts in 24h
+0 pts
13%
Yes 13%
No 87%
Arrive at PHL more than an hour late?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
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
84%
15–30 min late
8%
30 min–1 hour late
4%
1–2 hours late
2%
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
↑
Cloud base down to 300 ft, visibility down to 1 mi, 0.4 in of rain forecast at PHL that day
↑
PHL is prone to delays
↑
WN's recent on-time record
↓
Mostly benign weather forecast at MDW
↓
Sundays in October are usually quieter than average
Weather at each end
MDW (origin)
Gusts 11 kt Ceiling none (clear) Visibility 10+ mi Precip none
PHL (destination)
Gusts 14 kt Ceiling 300 ft Visibility 1 mi Precip 0.23 in
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.