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 3987
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 3987 · SAT → BNA
departs 6:50 AM CT · arrives 9:05 AM CT
Forecast issued Fri 10:00 AM ET · 46h before departure
Watch this flight
Odds over time
Arrive at BNA more than 15 minutes late?
6%
chance · ±0 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
6%
Leave 15+ late
4%
Arrive 1h+ late
2%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
3%
6%
9%
12%
5.4d
Now
1d
12h
6h
Departs
Lands
Arrive at BNA more than 15 minutes late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
6%
Yes 6%
No 94%
Leave SAT more than 15 minutes late?
Calm-weather odds: 3% · changed −1 pt in 24h
−1 pt
4%
Yes 4%
No 96%
Arrive at BNA more than an hour late?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to BNA?
On time or early
93%
15–30 min late
2%
30 min–1 hour late
1%
1–2 hours late
1%
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 200 ft, visibility down to 2 mi forecast at BNA that day
↓
Early flights usually leave on time
↓
6am departures from SAT are usually not late
Weather at each end
SAT (origin)
Gusts 27 kt Ceiling 1,400 ft Visibility 10+ mi Precip 0.06 in
BNA (destination)
Gusts 11 kt Ceiling 200 ft Visibility 4 mi Precip 0.25 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.