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 3977
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 3977 · MCI → HOU
departs 6:25 PM CT · arrives 8:30 PM CT
Forecast issued Wed 7:00 AM ET · 12h before departure
Watch this flight
Other days
Today
Tue 10/6 20%
Odds over time
Arrive at HOU more than 15 minutes late?
46%
chance · ±4 pts
+7 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
46%
Leave 15+ late
35%
Arrive 1h+ late
14%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.9d
2d
1d
Now
6h
Departs
Lands
Arrive at HOU more than 15 minutes late?
Calm-weather odds: 17% · changed +7 pts in 24h
+7 pts
46%
Yes 46%
No 54%
Leave MCI more than 15 minutes late?
Calm-weather odds: 21% · changed +7 pts in 24h
+7 pts
35%
Yes 35%
No 65%
Arrive at HOU more than an hour late?
Calm-weather odds: 4% · changed +1 pt in 24h
+1 pt
14%
Yes 14%
No 86%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
1%
Yes 1%
No 99%
How late will it get to HOU?
On time or early
54%
15–30 min late
16%
30 min–1 hour late
16%
1–2 hours late
11%
Over 2 hours late
2%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
0.6 in of rain forecast at MCI that day
↑
Gusts to 25 kt forecast at HOU that day
↑
Arrivals into HOU at that hour are often late
↓
Wednesdays in September are usually quieter than average
↓
MCI usually runs smoothly
Weather at each end
MCI (origin)
Gusts 12 kt Ceiling 4,733 ft Visibility 5 mi Precip 0.65 in
HOU (destination)
Gusts 25 kt Ceiling none (clear) Visibility 10+ mi Precip 0.13 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.