Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 645
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Today
WN 645 · STL → LGA
departs 5:45 AM CT · arrives 9:05 AM ET
Forecast issued Sun 3:00 AM ET · 4h before departure
Watch this flight
Other days
Today
Thu 10/8 6%
Odds over time
Arrive at LGA more than 15 minutes late?
6%
chance · ±0 pts
+3 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
6%
Leave 15+ late
4%
Arrive 1h+ late
1%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
3%
6%
9%
12%
5.4d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at LGA more than 15 minutes late?
Calm-weather odds: 4% · changed +3 pts in 24h
+3 pts
6%
Yes 6%
No 94%
Leave STL more than 15 minutes late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
4%
Yes 4%
No 96%
Arrive at LGA more than an hour late?
Calm-weather odds: <1% · changed +1 pt in 24h
+1 pt
1%
Yes 1%
No 99%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to LGA?
On time or early
94%
15–30 min late
3%
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
↑
LGA is busy at that time
↑
LGA is prone to delays
↑
This flight has been late 16% of the time recently
↓
Early flights usually leave on time
↓
5am departures from STL are usually not late
Weather at each end
STL (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
LGA (destination)
Gusts 14 kt Ceiling 2,200 ft Visibility 8 mi Precip 0.10 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.