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 1223
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 1223 · COS → HOU
departs 1:15 PM MT · arrives 4:40 PM CT
Forecast issued Fri 9:00 AM ET · 54h before departure
Watch this flight
Other days
Today 33%
Sun 10/4
Mon 10/5 12%
Tue 10/6 13%
Wed 10/7 12%
Odds over time
Arrive at HOU more than 15 minutes late?
33%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
33%
Leave 15+ late
28%
Arrive 1h+ late
6%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.7d
Now
1d
12h
6h
Departs
Lands
Arrive at HOU more than 15 minutes late?
Calm-weather odds: 19% · changed – in 24h
–
33%
Yes 33%
No 67%
Leave COS more than 15 minutes late?
Calm-weather odds: 19% · changed – in 24h
–
28%
Yes 28%
No 72%
Arrive at HOU more than an hour late?
Calm-weather odds: 4% · changed – in 24h
–
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
2%
Yes 2%
No 98%
How late will it get to HOU?
On time or early
66%
15–30 min late
15%
30 min–1 hour late
11%
1–2 hours late
4%
Over 2 hours late
2%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 600 ft, 0.5 in of rain forecast at HOU that day
↑
COS is prone to delays
↑
WN's recent on-time record
↓
Sundays in October are usually quieter than average
↓
Gusts to 27 kt forecast at COS that day
Weather at each end
COS (origin)
Gusts 27 kt Ceiling none (clear) Visibility 10+ mi Precip none
HOU (destination)
Gusts 19 kt Ceiling 600 ft Visibility 10+ mi Precip 0.52 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.