Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4326
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
WN 4326 · LAS → COS
departs 7:40 AM PT · arrives 10:35 AM MT
Forecast issued Tue 8:00 PM ET · 9h after departure
Watch this flight
Other days
Today
Wed 9/30 18%
Thu 10/1 13%
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?
16%
chance · ±0 pts
+2 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
16%
Leave 15+ late
14%
Arrive 1h+ late
3%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at COS more than 15 minutes late?
Calm-weather odds: 16% · changed +2 pts in 24h
+2 pts
16%
Yes 16%
No 84%
Leave LAS more than 15 minutes late?
Calm-weather odds: 14% · changed +3 pts in 24h
+3 pts
14%
Yes 14%
No 86%
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
1%
Yes 1%
No 99%
How late will it get to COS?
On time or early
83%
15–30 min late
5%
30 min–1 hour late
8%
1–2 hours late
2%
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
↑
Gusts to 27 kt forecast at LAS that day
↑
LAS is busy at that time
↑
LAS is prone to delays
↓
Early flights usually leave on time
↓
Arrivals into COS at that hour are usually not late
Weather at each end
LAS (origin)
Gusts 27 kt Ceiling 4,700 ft Visibility 7 mi Precip 0.08 in
COS (destination)
Gusts 24 kt Ceiling 6,000 ft Visibility 10+ mi Precip 0.07 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.