Schedule: a typical Saturday (the flights of Jul 25, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4535
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
WN 4535 · GSP → BNA
departs 12:50 PM ET · arrives 1:05 PM CT
Forecast issued Wed 11:00 PM ET · 62h before departure
Watch this flight
Other days
Today 14%
Fri 10/2 14%
Sat 10/3
Sun 10/4 21%
Mon 10/5 15%
Tue 10/6 11%
Wed 10/7 14%
Odds over time
Arrive at BNA more than 15 minutes late?
16%
chance · ±0 pts
+5 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
15%
Arrive 1h+ late
4%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
4.6d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at BNA more than 15 minutes late?
Calm-weather odds: 7% · changed +5 pts in 24h
+5 pts
16%
Yes 16%
No 84%
Leave GSP more than 15 minutes late?
Calm-weather odds: 11% · changed +3 pts in 24h
+3 pts
15%
Yes 15%
No 85%
Arrive at BNA more than an hour late?
Calm-weather odds: 2% · changed +1 pt in 24h
+1 pt
4%
Yes 4%
No 96%
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
83%
15–30 min late
5%
30 min–1 hour late
7%
1–2 hours late
3%
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 300 ft, visibility down to 2 mi, 0.6 in of rain forecast at GSP that day
↑
Cloud base down to 300 ft, visibility down to 2 mi forecast at BNA that day
↑
Early flights usually leave on time
↓
GSP usually runs smoothly
↓
BNA usually runs smoothly
Weather at each end
GSP (origin)
Gusts 16 kt Ceiling 300 ft Visibility 2 mi Precip 0.63 in
BNA (destination)
Gusts 12 kt Ceiling 300 ft Visibility 2 mi Precip 0.21 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.