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 3899
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
WN 3899 · STL → CLE
departs 12:50 PM CT · arrives 3:20 PM ET
Forecast issued Fri 9:00 PM ET · 7h after departure
Watch this flight
Other days
Today
Sat 10/3 6%
Mon 10/5 13%
Odds over time
Arrive at CLE more than 15 minutes late?
16%
chance · ±0 pts
−1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
16%
Leave 15+ late
20%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
3.7d
2d
1d
12h
6h
Departs
Lands
Arrive at CLE more than 15 minutes late?
Calm-weather odds: 16% · changed −1 pt in 24h
−1 pt
16%
Yes 16%
No 84%
Leave STL more than 15 minutes late?
Calm-weather odds: 20% · changed −2 pts in 24h
−2 pts
20%
Yes 20%
No 80%
Arrive at CLE more than an hour late?
Calm-weather odds: 4% · 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 CLE?
On time or early
84%
15–30 min late
6%
30 min–1 hour late
6%
1–2 hours late
3%
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
↑
Gusts to 27 kt, cloud base down to 500 ft, visibility down to 2.5 mi, 0.7 in of rain forecast at CLE that day
↑
WN's recent on-time record
↑
Other factors
↓
CLE usually runs smoothly
↓
STL usually runs smoothly
Weather at each end
STL (origin)
Gusts 20 kt Ceiling 600 ft Visibility 9 mi Precip 0.01 in
CLE (destination)
Gusts 27 kt Ceiling 500 ft Visibility 2.5 mi Precip 0.56 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.