Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 1228
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Tomorrow
WN 1228 · DEN → COS
departs 1:20 PM MT · arrives 2:05 PM MT
Forecast issued Sun 7:00 AM ET · 32h before departure
Watch this flight
Other days
Today 38%
Mon 10/5
Fri 10/9 32%
Odds over time
Arrive at COS more than 15 minutes late?
25%
chance · ±3 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
25%
Leave 15+ late
27%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.6d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at COS more than 15 minutes late?
Calm-weather odds: 19% · changed −1 pt in 24h
−1 pt
25%
Yes 25%
No 75%
Leave DEN more than 15 minutes late?
Calm-weather odds: 28% · changed +0 pts in 24h
+0 pts
27%
Yes 27%
No 73%
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 100%
How late will it get to COS?
On time or early
75%
15–30 min late
14%
30 min–1 hour late
8%
1–2 hours late
3%
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
↑
1pm departures from DEN are often late
↑
Other factors
↑
This flight has been late 33% of the time recently
↓
Mondays in October are usually quieter than average
↓
Mostly benign weather forecast at DEN
Weather at each end
DEN (origin)
Gusts 18 kt Ceiling none (clear) Visibility 10+ mi Precip none
COS (destination)
Gusts 17 kt Ceiling none (clear) Visibility 10+ mi Precip none
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.