Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 1104
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
WN 1104 · BWI → SJU
departs 6:40 PM ET · arrives 10:50 PM AT
Forecast issued Tue 4:00 PM ET · 3h before departure
Watch this flight
Other days
Today
Wed 9/30 24%
Thu 10/1 28%
Fri 10/2 30%
Sat 10/3 26%
Sun 10/4 29%
Mon 10/5 22%
Odds over time
Arrive at SJU more than 15 minutes late?
33%
chance · ±0 pts
+9 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
33%
Leave 15+ late
47%
Arrive 1h+ late
7%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at SJU more than 15 minutes late?
Calm-weather odds: 31% · changed +9 pts in 24h
+9 pts
33%
Yes 33%
No 67%
Leave BWI more than 15 minutes late?
Calm-weather odds: 45% · changed +3 pts in 24h
+3 pts
47%
Yes 47%
No 53%
Arrive at SJU more than an hour late?
Calm-weather odds: 7% · changed +2 pts in 24h
+2 pts
7%
Yes 7%
No 93%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SJU?
On time or early
67%
15–30 min late
15%
30 min–1 hour late
10%
1–2 hours late
6%
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
↑
6pm departures from BWI are often late
↑
This flight has been late 34% of the time recently
↑
Later flights pick up delays from earlier in the day
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at BWI
Weather at each end
BWI (origin)
Gusts 7 kt Ceiling 3,600 ft Visibility 10+ mi Precip none
SJU (destination)
Gusts 25 kt Ceiling 2,900 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.