Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SOUTHWEST · FLIGHT WN 3684
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Today
WN 3684 · SJC → LGB
departs 5:05 PM PT · arrives 6:25 PM PT
Forecast issued Thu 1:00 PM ET · 7h before departure
Watch this flight
Other days
Today
Fri 10/2 28%
Sat 10/3 12%
Sun 10/4 20%
Mon 10/5 16%
Tue 10/6 11%
Wed 10/7 12%
Odds over time
Arrive at LGB more than 15 minutes late?
39%
chance · ±0 pts
+16 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
39%
Leave 15+ late
48%
Arrive 1h+ late
19%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.9d
2d
1d
12h
Now
Departs
Lands
Arrive at LGB more than 15 minutes late?
Calm-weather odds: 23% · changed +16 pts in 24h
+16 pts
39%
Yes 39%
No 61%
Leave SJC more than 15 minutes late?
Calm-weather odds: 28% · changed +20 pts in 24h
+20 pts
48%
Yes 48%
No 52%
Arrive at LGB more than an hour late?
Calm-weather odds: 7% · changed +11 pts in 24h
+11 pts
19%
Yes 19%
No 81%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to LGB?
On time or early
61%
15–30 min late
27%
30 min–1 hour late
0%
1–2 hours late
11%
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
↑
Later flights pick up delays from earlier in the day
↑
WN's recent on-time record
↑
5pm departures from SJC are often late
↓
Cloud base down to 700 ft forecast at SJC that day
↓
LGB usually runs smoothly
Weather at each end
SJC (origin)
Gusts 11 kt Ceiling 700 ft Visibility 6 mi Precip none
LGB (destination)
Gusts 12 kt Ceiling 800 ft Visibility 5 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.