Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4326
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
WN 4326 · LAS → COS
departs 8:50 AM PT · arrives 11:45 AM MT
Forecast issued Tue 7:00 PM ET · 41h before departure
Watch this flight
Other days
Today 16%
Wed 9/30 18%
Thu 10/1
Fri 10/2 12%
Sat 10/3 5%
Sun 10/4 7%
Mon 10/5 10%
Odds over time
Arrive at COS more than 15 minutes late?
13%
chance · ±2 pts
−2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
13%
Leave 15+ late
18%
Arrive 1h+ late
3%
Cancelled
3%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at COS more than 15 minutes late?
Calm-weather odds: 9% · changed −2 pts in 24h
−2 pts
13%
Yes 13%
No 87%
Leave LAS more than 15 minutes late?
Calm-weather odds: 14% · changed +1 pt in 24h
+1 pt
18%
Yes 18%
No 82%
Arrive at COS more than an hour late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
How late will it get to COS?
On time or early
84%
15–30 min late
4%
30 min–1 hour late
6%
1–2 hours late
2%
Over 2 hours late
<1%
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Gusts to 40 kt forecast at COS that day
↑
WN's recent on-time record
↑
LAS is busy at that time
↓
Mostly benign weather forecast at LAS
↓
Early flights usually leave on time
Weather at each end
LAS (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
COS (destination)
Gusts 40 kt Ceiling 2,700 ft Visibility 5 mi Precip 0.15 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.