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 4257
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
WN 4257 · DAL → MCI
departs 10:20 AM CT · arrives 11:55 AM CT
Forecast issued Fri 5:00 AM ET · 54h before departure
Watch this flight
Other days
Sat 10/3 33%
Sun 10/4
Odds over time
Arrive at MCI more than 15 minutes late?
13%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
13%
Leave 15+ late
17%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
5.6d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at MCI more than 15 minutes late?
Calm-weather odds: 9% · changed – in 24h
–
13%
Yes 13%
No 87%
Leave DAL more than 15 minutes late?
Calm-weather odds: 10% · changed – in 24h
–
17%
Yes 17%
No 83%
Arrive at MCI more than an hour late?
Calm-weather odds: 2% · changed – in 24h
–
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to MCI?
On time or early
87%
15–30 min late
5%
30 min–1 hour late
3%
1–2 hours late
4%
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
↑
DAL is prone to delays
↑
This flight has been late 39% of the time recently
↑
Cloud base down to 600 ft forecast at DAL that day
↓
Mostly benign weather forecast at MCI
↓
MCI usually runs smoothly
Weather at each end
DAL (origin)
Gusts 17 kt Ceiling 600 ft Visibility 4 mi Precip 0.06 in
MCI (destination)
Gusts 11 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.