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 3257
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
WN 3257 · DAL → COS
departs 11:05 AM CT · arrives 12:00 PM MT
Forecast issued Sat 3:00 PM ET · 45h before departure
Watch this flight
Other days
Sun 10/4 25%
Mon 10/5
Fri 10/9 20%
Odds over time
Arrive at COS more than 15 minutes late?
16%
chance · ±2 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
18%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.5d
Now
1d
12h
6h
Departs
Lands
Arrive at COS more than 15 minutes late?
Calm-weather odds: 12% · changed +0 pts in 24h
+0 pts
16%
Yes 16%
No 84%
Leave DAL more than 15 minutes late?
Calm-weather odds: 18% · changed +0 pts in 24h
+0 pts
18%
Yes 18%
No 82%
Arrive at COS more than an hour late?
Calm-weather odds: 2% · 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
84%
15–30 min late
9%
30 min–1 hour late
4%
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
↑
This flight has been late 29% of the time recently
↑
DAL is prone to delays
↑
WN's recent on-time record
↓
Mostly benign weather forecast at DAL
↓
Early flights usually leave on time
Weather at each end
DAL (origin)
Gusts 15 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.