Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4326
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Tomorrow
WN 4326 · LAS → COS
departs 7:40 AM PT · arrives 10:35 AM MT
Forecast issued Tue 10:00 PM ET · 13h before departure
Watch this flight
Other days
Today
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?
19%
chance · ±6 pts
+0 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
19%
Leave 15+ late
13%
Arrive 1h+ late
3%
Cancelled
2%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
Now
6h
Departs
Lands
Arrive at COS more than 15 minutes late?
Calm-weather odds: 8% · changed +0 pts in 24h
+0 pts
19%
Yes 19%
No 81%
Leave LAS more than 15 minutes late?
Calm-weather odds: 10% · changed +1 pt in 24h
+1 pt
13%
Yes 13%
No 87%
Arrive at COS more than an hour late?
Calm-weather odds: 2% · changed −1 pt in 24h
−1 pt
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
2%
Yes 2%
No 98%
How late will it get to COS?
On time or early
79%
15–30 min late
10%
30 min–1 hour late
5%
1–2 hours late
2%
Over 2 hours late
<1%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Gusts to 40 kt, cloud base down to 900 ft, 0.8 in of rain forecast at COS 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 16 kt Ceiling none (clear) Visibility 10+ mi Precip none
COS (destination)
Gusts 40 kt Ceiling 900 ft Visibility 4 mi Precip 0.83 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.