Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3997
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
WN 3997 · TPA → ATL
departs 4:00 PM ET · arrives 5:35 PM ET
Forecast issued Fri 6:00 PM ET · 2h after departure
Watch this flight
Other days
Today
Sat 10/3 45%
Mon 10/5 22%
Odds over time
Arrive at ATL more than 15 minutes late?
33%
chance · ±0 pts
−14 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
33%
Leave 15+ late
26%
Arrive 1h+ late
9%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
3.8d
2d
1d
12h
6h
Departs
Lands
Arrive at ATL more than 15 minutes late?
Calm-weather odds: 27% · changed −14 pts in 24h
−14 pts
33%
Yes 33%
No 67%
Leave TPA more than 15 minutes late?
Calm-weather odds: 25% · changed −8 pts in 24h
−8 pts
26%
Yes 26%
No 74%
Arrive at ATL more than an hour late?
Calm-weather odds: 6% · changed −8 pts in 24h
−8 pts
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 99%
How late will it get to ATL?
On time or early
66%
15–30 min late
16%
30 min–1 hour late
8%
1–2 hours late
7%
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
↑
0.4 in of rain, thunderstorms forecast at TPA that day
↑
4pm departures from TPA are often late
↑
Later flights pick up delays from earlier in the day
↓
Cloud base down to 600 ft forecast at ATL that day
↓
ATL usually runs smoothly
Weather at each end
TPA (origin)
Gusts 17 kt Ceiling 5,500 ft Visibility 10+ mi Precip 0.09 in
ATL (destination)
Gusts 8 kt Ceiling 600 ft Visibility 5 mi Precip none
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.