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.
SKYWEST · FLIGHT OO 3966
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2
OO 3966 · SEA → SNA
departs 7:40 AM PT · arrives 10:41 AM PT
Forecast issued Fri 10:00 PM ET · 11h after departure
Watch this flight
Other days
Fri 10/2
Today 33%
Mon 10/5 22%
Fri 10/9 20%
Odds over time
Arrive at SNA more than 15 minutes late?
18%
chance · ±0 pts
−17 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
18%
Leave 15+ late
14%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.5d
2d
1d
12h
6h
Departs
Lands
Arrive at SNA more than 15 minutes late?
Calm-weather odds: 18% · changed −17 pts in 24h
−17 pts
18%
Yes 18%
No 82%
Leave SEA more than 15 minutes late?
Calm-weather odds: 14% · changed −11 pts in 24h
−11 pts
14%
Yes 14%
No 86%
Arrive at SNA more than an hour late?
Calm-weather odds: 6% · changed −15 pts in 24h
−15 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 SNA?
On time or early
82%
15–30 min late
6%
30 min–1 hour late
6%
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
↑
OO's recent on-time record
↑
SNA is prone to delays
↑
Fridays in October are usually busier than average
↓
Mostly benign weather forecast at SEA
↓
Early flights usually leave on time
Weather at each end
SEA (origin)
Gusts 10 kt Ceiling 1,500 ft Visibility 10+ mi Precip none
SNA (destination)
Gusts 10 kt Ceiling 300 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.