Schedule: a typical summer Wednesday (the flights of Jul 29, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3718
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30
WN 3718 · SJU → BWI
departs 10:00 AM AT · arrives 2:10 PM ET
Forecast issued Wed 10:00 PM ET · 12h after departure
Watch this flight
Other days
Wed 9/30
Mon 10/5 14%
Fri 10/9 11%
Odds over time
Arrive at BWI more than 15 minutes late?
9%
chance · ±0 pts
−2 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
9%
Leave 15+ late
9%
Arrive 1h+ late
3%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.7d
2d
1d
12h
6h
Departs
Lands
Arrive at BWI more than 15 minutes late?
Calm-weather odds: 9% · changed −2 pts in 24h
−2 pts
9%
Yes 9%
No 91%
Leave SJU more than 15 minutes late?
Calm-weather odds: 9% · changed −1 pt in 24h
−1 pt
9%
Yes 9%
No 91%
Arrive at BWI more than an hour late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to BWI?
On time or early
90%
15–30 min late
6%
30 min–1 hour late
<1%
1–2 hours late
2%
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
↓
Wednesdays in September are usually quieter than average
↓
10am departures from SJU are usually not late
Weather at each end
SJU (origin)
Gusts 24 kt Ceiling none (clear) Visibility 10+ mi Precip 0.07 in
BWI (destination)
Gusts 7 kt Ceiling 4,900 ft Visibility 10+ 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.