Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 4130
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Today
WN 4130 · DEN → SEA
departs 12:55 PM MT · arrives 2:45 PM PT
Forecast issued Tue 4:00 PM ET · 1h after departure
Watch this flight
Other days
Today
Wed 9/30 58%
Thu 10/1 30%
Fri 10/2 31%
Sat 10/3 25%
Mon 10/5 31%
Odds over time
Arrive at SEA more than 15 minutes late?
50%
chance · ±2 pts
+4 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
50%
Leave 15+ late
34%
Arrive 1h+ late
5%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 46% · changed +4 pts in 24h
+4 pts
50%
Yes 50%
No 50%
Leave DEN more than 15 minutes late?
Calm-weather odds: 32% · changed −6 pts in 24h
−6 pts
34%
Yes 34%
No 66%
Arrive at SEA more than an hour late?
Calm-weather odds: 4% · changed −1 pt in 24h
−1 pt
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SEA?
On time or early
50%
15–30 min late
23%
30 min–1 hour late
21%
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
↑
This flight has been late 44% of the time recently
↑
Cloud base down to 1,000 ft forecast at SEA that day
↑
SEA is prone to delays
↓
Tuesdays in September are usually quieter than average
↓
Mostly benign weather forecast at DEN
Weather at each end
DEN (origin)
Gusts 9 kt Ceiling 6,000 ft Visibility 10+ mi Precip none
SEA (destination)
Gusts 24 kt Ceiling 1,000 ft Visibility 6 mi Precip 0.03 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.