Schedule: a typical summer Wednesday (the flights of Jul 29, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3766
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30
WN 3766 · RDU → MDW
departs 7:00 PM ET · arrives 8:00 PM CT
Forecast issued Wed 10:00 PM ET · 3h after departure
Watch this flight
Other days
Wed 9/30
Sun 10/4 30%
Mon 10/5 19%
Fri 10/9 28%
Odds over time
Arrive at MDW more than 15 minutes late?
35%
chance · ±0 pts
−7 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
35%
Leave 15+ late
35%
Arrive 1h+ late
8%
Cancelled
2%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
12h
6h
Departs
Lands
Now
Arrive at MDW more than 15 minutes late?
Calm-weather odds: 35% · changed −7 pts in 24h
−7 pts
35%
Yes 35%
No 65%
Leave RDU more than 15 minutes late?
Calm-weather odds: 35% · changed −4 pts in 24h
−4 pts
35%
Yes 35%
No 65%
Arrive at MDW more than an hour late?
Calm-weather odds: 8% · changed −3 pts in 24h
−3 pts
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: 1% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
How late will it get to MDW?
On time or early
64%
15–30 min late
6%
30 min–1 hour late
21%
1–2 hours late
5%
Over 2 hours late
3%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 800 ft, visibility down to 2.5 mi, 0.8 in of rain forecast at MDW that day
↑
Arrivals into MDW at that hour are often late
↑
Later flights pick up delays from earlier in the day
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at RDU
Weather at each end
RDU (origin)
Gusts 6 kt Ceiling none (clear) Visibility 4 mi Precip none
MDW (destination)
Gusts 21 kt Ceiling 700 ft Visibility 2.5 mi Precip 0.94 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.