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 3535
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 3535 · MDW → JAX
departs 6:50 PM CT · arrives 10:10 PM ET
Forecast issued Fri 9:00 PM ET · 47h before departure
Watch this flight
Odds over time
Arrive at JAX more than 15 minutes late?
30%
chance · ±5 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
30%
Leave 15+ late
30%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.9d
Now
1d
12h
6h
Departs
Lands
Arrive at JAX more than 15 minutes late?
Calm-weather odds: 23% · changed +0 pts in 24h
+0 pts
30%
Yes 30%
No 70%
Leave MDW more than 15 minutes late?
Calm-weather odds: 30% · changed −1 pt in 24h
−1 pt
30%
Yes 30%
No 70%
Arrive at JAX more than an hour late?
Calm-weather odds: 4% · changed +0 pts in 24h
+0 pts
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to JAX?
On time or early
70%
15–30 min late
14%
30 min–1 hour late
11%
1–2 hours late
3%
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
↑
6pm departures from MDW are often late
↑
Later flights pick up delays from earlier in the day
↑
Mostly benign weather forecast at JAX
↓
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
JAX (destination)
Gusts 10 kt Ceiling 1,500 ft Visibility 9 mi Precip 0.33 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.