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.
SKYWEST · FLIGHT OO 3999
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
OO 3999 · SEA → SNA
departs 1:54 PM PT · arrives 4:55 PM PT
Forecast issued Wed 6:00 AM ET · 35h before departure
Watch this flight
Other days
Today 24%
Thu 10/1
Fri 10/2 27%
Sat 10/3 26%
Sun 10/4 30%
Mon 10/5 27%
Tue 10/6 24%
Odds over time
Arrive at SNA more than 15 minutes late?
26%
chance · ±1 pts
+2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
26%
Leave 15+ late
22%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SNA more than 15 minutes late?
Calm-weather odds: 21% · changed +2 pts in 24h
+2 pts
26%
Yes 26%
No 74%
Leave SEA more than 15 minutes late?
Calm-weather odds: 22% · changed +2 pts in 24h
+2 pts
22%
Yes 22%
No 78%
Arrive at SNA more than an hour late?
Calm-weather odds: 6% · changed +1 pt in 24h
+1 pt
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 SNA?
On time or early
74%
15–30 min late
10%
30 min–1 hour late
10%
1–2 hours late
5%
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
↑
1pm departures from SEA are often late
↑
SNA is prone to delays
↑
SEA is busy at that time
↓
Mostly benign weather forecast at SEA
↓
Other factors
Weather at each end
SEA (origin)
Gusts 6 kt Ceiling 3,500 ft Visibility 8 mi Precip none
SNA (destination)
Gusts 14 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.