Schedule: a typical summer Saturday (the flights of Jul 25, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3397
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Yesterday
WN 3397 · SEA → DEN
departs 9:45 AM PT · arrives 1:25 PM MT
Forecast issued Sat 10:00 PM ET · 9h after departure
Watch this flight
Other days
Sat 10/3
Today 21%
Mon 10/5 20%
Fri 10/9 13%
Odds over time
Arrive at DEN more than 15 minutes late?
35%
chance · ±1 pts
+16 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
35%
Leave 15+ late
31%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
4.6d
2d
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 35% · changed +16 pts in 24h
+16 pts
35%
Yes 35%
No 65%
Leave SEA more than 15 minutes late?
Calm-weather odds: 31% · changed +9 pts in 24h
+9 pts
31%
Yes 31%
No 69%
Arrive at DEN more than an hour late?
Calm-weather odds: 6% · changed +3 pts in 24h
+3 pts
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to DEN?
On time or early
65%
15–30 min late
17%
30 min–1 hour late
12%
1–2 hours late
5%
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
↑
SEA is prone to delays
↑
This flight has been late 21% of the time recently
↑
WN's recent on-time record
↓
Gusts to 27 kt forecast at DEN that day
↓
Early flights usually leave on time
Weather at each end
SEA (origin)
Gusts 9 kt Ceiling 100 ft Visibility 2.5 mi Precip none
DEN (destination)
Gusts 27 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.