Schedule: a typical Saturday (the flights of Jul 25, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SKYWEST · FLIGHT OO 3816
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
OO 3816 · ONT → SEA
departs 6:20 AM PT · arrives 9:15 AM PT
Forecast issued Thu 6:00 AM ET · 51h before departure
Watch this flight
Other days
Today 6%
Fri 10/2 5%
Sat 10/3
Sun 10/4 8%
Mon 10/5 8%
Tue 10/6 7%
Wed 10/7 6%
Odds over time
Arrive at SEA more than 15 minutes late?
6%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
6%
Leave 15+ late
7%
Arrive 1h+ late
3%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
3%
6%
9%
12%
4.5d
Now
1d
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 4% · changed – in 24h
–
6%
Yes 6%
No 94%
Leave ONT more than 15 minutes late?
Calm-weather odds: 5% · changed – in 24h
–
7%
Yes 7%
No 93%
Arrive at SEA more than an hour late?
Calm-weather odds: 3% · changed – in 24h
–
3%
Yes 3%
No 97%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to SEA?
On time or early
93%
15–30 min late
3%
30 min–1 hour late
<1%
1–2 hours late
1%
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
↑
SEA is prone to delays
↑
SEA is busy at that time
↓
This flight has been late 10% of the time recently
↓
Early flights usually leave on time
Weather at each end
ONT (origin)
Gusts 14 kt Ceiling none (clear) Visibility 10+ mi Precip none
SEA (destination)
Gusts 13 kt Ceiling 200 ft Visibility 9 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.