Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 1109
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
WN 1109 · BWI → STL
departs 6:15 AM ET · arrives 7:30 AM CT
Forecast issued Fri 12:00 PM ET · 66h before departure
Watch this flight
Other days
Today 4%
Sat 10/3 6%
Sun 10/4 6%
Mon 10/5
Wed 10/7 4%
Odds over time
Arrive at STL more than 15 minutes late?
5%
chance · ±1 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
5%
Leave 15+ late
5%
Arrive 1h+ late
2%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
3%
6%
9%
12%
6.3d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at STL more than 15 minutes late?
Calm-weather odds: 4% · changed +0 pts in 24h
+0 pts
5%
Yes 5%
No 95%
Leave BWI more than 15 minutes late?
Calm-weather odds: 4% · changed +0 pts in 24h
+0 pts
5%
Yes 5%
No 95%
Arrive at STL more than an hour late?
Calm-weather odds: <1% · changed +1 pt in 24h
+1 pt
2%
Yes 2%
No 98%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to STL?
On time or early
95%
15–30 min late
2%
30 min–1 hour late
1%
1–2 hours late
1%
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
↑
Cloud base down to 233 ft, visibility down to 0.5 mi forecast at BWI that day
↓
Early flights usually leave on time
↓
Arrivals into STL at that hour are usually not late
Weather at each end
BWI (origin)
Gusts 15 kt Ceiling 233 ft Visibility 0.5 mi Precip none
STL (destination)
Gusts 9 kt Ceiling none (clear) Visibility 8 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.