Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3399
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
WN 3399 · AUS → DEN
departs 12:10 PM CT · arrives 1:20 PM MT
Forecast issued Fri 6:00 PM ET · 5h after departure
Watch this flight
Other days
Today
Sun 10/4 15%
Mon 10/5 15%
Odds over time
Arrive at DEN more than 15 minutes late?
24%
chance · ±0 pts
−3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
24%
Leave 15+ late
27%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.6d
2d
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 24% · changed −3 pts in 24h
−3 pts
24%
Yes 24%
No 76%
Leave AUS more than 15 minutes late?
Calm-weather odds: 26% · changed −4 pts in 24h
−4 pts
27%
Yes 27%
No 73%
Arrive at DEN more than an hour late?
Calm-weather odds: 6% · changed −2 pts in 24h
−2 pts
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 99%
How late will it get to DEN?
On time or early
75%
15–30 min late
10%
30 min–1 hour late
9%
1–2 hours late
4%
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
↑
Cloud base down to 400 ft, visibility down to 2 mi, 0.3 in of rain forecast at AUS that day
↑
12pm departures from AUS are often late
↑
This flight has been late 26% of the time recently
↓
Gusts to 31 kt forecast at DEN that day
↓
AUS usually runs smoothly
Weather at each end
AUS (origin)
Gusts 10 kt Ceiling 400 ft Visibility 1.5 mi Precip 0.42 in
DEN (destination)
Gusts 28 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.