Schedule: a typical summer Saturday (the flights of Jul 25, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 556
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Tomorrow
WN 556 · MYR → STL
departs 4:50 PM ET · arrives 5:55 PM CT
Forecast issued Fri 8:00 PM ET · 21h before departure
Watch this flight
Odds over time
Arrive at STL more than 15 minutes late?
22%
chance · ±3 pts
+1 pt · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
22%
Leave 15+ late
27%
Arrive 1h+ late
8%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
4.8d
2d
Now
12h
6h
Departs
Lands
Arrive at STL more than 15 minutes late?
Calm-weather odds: 12% · changed +1 pt in 24h
+1 pt
22%
Yes 22%
No 78%
Leave MYR more than 15 minutes late?
Calm-weather odds: 22% · changed +1 pt in 24h
+1 pt
27%
Yes 27%
No 73%
Arrive at STL more than an hour late?
Calm-weather odds: 3% · changed +1 pt in 24h
+1 pt
8%
Yes 8%
No 92%
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
77%
15–30 min late
11%
30 min–1 hour late
3%
1–2 hours late
6%
Over 2 hours late
2%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
0.4 in of rain forecast at MYR that day
↑
Later flights pick up delays from earlier in the day
↑
This flight has been late 34% of the time recently
↓
MYR usually runs smoothly
↓
Mostly benign weather forecast at STL
Weather at each end
MYR (origin)
Gusts 7 kt Ceiling 6,000 ft Visibility 9 mi Precip 0.36 in
STL (destination)
Gusts 10 kt Ceiling none (clear) 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.