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 3634
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
WN 3634 · SFO → BNA
departs 10:50 PM PT · arrives 5:10 AM CT
Forecast issued Thu 9:00 AM ET · 65h before departure
Watch this flight
Other days
Today 35%
Fri 10/2 28%
Sat 10/3
Sun 10/4 30%
Mon 10/5 27%
Tue 10/6 21%
Wed 10/7 23%
Odds over time
Arrive at BNA more than 15 minutes late?
23%
chance · ±4 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
23%
Leave 15+ late
27%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.2d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at BNA more than 15 minutes late?
Calm-weather odds: 19% · changed – in 24h
–
23%
Yes 23%
No 77%
Leave SFO more than 15 minutes late?
Calm-weather odds: 26% · changed – in 24h
–
27%
Yes 27%
No 73%
Arrive at BNA more than an hour late?
Calm-weather odds: 5% · changed – in 24h
–
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to BNA?
On time or early
76%
15–30 min late
10%
30 min–1 hour late
7%
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
No breakdown for this forecast yet.
Weather at each end
SFO (origin)
Gusts 11 kt Ceiling none (clear) Visibility 1 mi Precip none
BNA (destination)
Gusts 11 kt Ceiling 200 ft Visibility 0.4 mi Precip 0.07 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.