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 4724
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
WN 4724 · STL → BOS
departs 7:55 PM CT · arrives 11:30 PM ET
Forecast issued Fri 10:00 AM ET · 11h before departure
Watch this flight
Other days
Today
Sat 10/3 23%
Mon 10/5 40%
Odds over time
Arrive at BOS more than 15 minutes late?
58%
chance · ±0 pts
+14 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
58%
Leave 15+ late
58%
Arrive 1h+ late
28%
Cancelled
5%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
4.0d
2d
1d
Now
6h
Departs
Lands
Arrive at BOS more than 15 minutes late?
Calm-weather odds: 30% · changed +14 pts in 24h
+14 pts
58%
Yes 58%
No 42%
Leave STL more than 15 minutes late?
Calm-weather odds: 38% · changed +11 pts in 24h
+11 pts
58%
Yes 58%
No 42%
Arrive at BOS more than an hour late?
Calm-weather odds: 8% · changed +20 pts in 24h
+20 pts
28%
Yes 28%
No 72%
Cancelled?
Calm-weather odds: <1% · changed +4 pts in 24h
+4 pts
5%
Yes 5%
No 95%
How late will it get to BOS?
On time or early
40%
15–30 min late
22%
30 min–1 hour late
6%
1–2 hours late
24%
Over 2 hours late
3%
Cancelled
5%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Arrivals into BOS at that hour are often late
↑
This flight has been late 31% of the time recently
↑
7pm departures from STL are often late
↓
STL usually runs smoothly
Weather at each end
STL (origin)
Gusts 17 kt Ceiling 600 ft Visibility 9 mi Precip 0.01 in
BOS (destination)
Gusts 21 kt Ceiling 6,000 ft Visibility 10+ mi Precip 0.23 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.