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 3389
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Yesterday
WN 3389 · SEA → SAN
departs 3:55 PM PT · arrives 6:45 PM PT
Forecast issued Sat 10:00 PM ET · 3h after departure
Watch this flight
Odds over time
Arrive at SAN more than 15 minutes late?
41%
chance · ±1 pts
+2 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
41%
Leave 15+ late
44%
Arrive 1h+ late
9%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
25%
50%
75%
100%
4.9d
2d
1d
12h
6h
Departs
Lands
Arrive at SAN more than 15 minutes late?
Calm-weather odds: 41% · changed +2 pts in 24h
+2 pts
41%
Yes 41%
No 59%
Leave SEA more than 15 minutes late?
Calm-weather odds: 45% · changed +4 pts in 24h
+4 pts
44%
Yes 44%
No 56%
Arrive at SAN more than an hour late?
Calm-weather odds: 9% · changed −1 pt in 24h
−1 pt
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SAN?
On time or early
58%
15–30 min late
14%
30 min–1 hour late
18%
1–2 hours late
7%
Over 2 hours late
3%
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 46% of the time recently
↑
3pm departures from SEA are often late
↑
WN's recent on-time record
↓
Mostly benign weather forecast at SAN
↓
Cloud base down to 100 ft, visibility down to 2.5 mi forecast at SEA that day
Weather at each end
SEA (origin)
Gusts 9 kt Ceiling 100 ft Visibility 2.5 mi Precip none
SAN (destination)
Gusts 21 kt Ceiling none (clear) Visibility 8 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.