Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4357
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
WN 4357 · SJC → MDW
departs 10:05 AM PT · arrives 4:10 PM CT
Forecast issued Wed 5:00 PM ET · 20h before departure
Watch this flight
Other days
Today 37%
Thu 10/1
Fri 10/2 19%
Sun 10/4 23%
Mon 10/5 16%
Tue 10/6 22%
Odds over time
Arrive at MDW more than 15 minutes late?
35%
chance · ±4 pts
+12 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
35%
Leave 15+ late
22%
Arrive 1h+ late
6%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.7d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at MDW more than 15 minutes late?
Calm-weather odds: 19% · changed +12 pts in 24h
+12 pts
35%
Yes 35%
No 65%
Leave SJC more than 15 minutes late?
Calm-weather odds: 16% · changed +5 pts in 24h
+5 pts
22%
Yes 22%
No 78%
Arrive at MDW more than an hour late?
Calm-weather odds: 2% · changed +2 pts in 24h
+2 pts
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 MDW?
On time or early
64%
15–30 min late
18%
30 min–1 hour late
11%
1–2 hours late
4%
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
↑
Cloud base down to 600 ft, visibility down to 2 mi, 0.8 in of rain forecast at MDW that day
↑
Arrivals into MDW at that hour are often late
↑
SJC is prone to delays
↓
Thursdays in October are usually quieter than average
↓
Cloud base down to 1,300 ft forecast at SJC that day
Weather at each end
SJC (origin)
Gusts 11 kt Ceiling 1,300 ft Visibility 6 mi Precip none
MDW (destination)
Gusts 14 kt Ceiling 600 ft Visibility 2 mi Precip 0.80 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.