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 4130
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
WN 4130 · DEN → SEA
departs 12:55 PM MT · arrives 2:45 PM PT
Forecast issued Wed 10:00 PM ET · 7h after departure
Watch this flight
Other days
Wed 9/30
Today 32%
Fri 10/2 33%
Sat 10/3 28%
Mon 10/5 31%
Tue 10/6 31%
Wed 10/7 24%
Odds over time
Arrive at SEA more than 15 minutes late?
35%
chance · ±0 pts
−18 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
35%
Leave 15+ late
24%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
25%
50%
75%
100%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 35% · changed −18 pts in 24h
−18 pts
35%
Yes 35%
No 65%
Leave DEN more than 15 minutes late?
Calm-weather odds: 24% · changed −19 pts in 24h
−19 pts
24%
Yes 24%
No 76%
Arrive at SEA more than an hour late?
Calm-weather odds: 4% · changed −3 pts in 24h
−3 pts
4%
Yes 4%
No 96%
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
65%
15–30 min late
17%
30 min–1 hour late
14%
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
↑
This flight has been late 44% of the time recently
↑
SEA is prone to delays
↑
12pm departures from DEN are often late
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at DEN
Weather at each end
DEN (origin)
Gusts 20 kt Ceiling 8,000 ft Visibility 10+ mi Precip 0.03 in
SEA (destination)
Gusts 9 kt Ceiling 1,300 ft 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.