Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
SKYWEST · FLIGHT OO 3086
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
OO 3086 · STS → ONT
departs 4:35 PM PT · arrives 6:03 PM PT
Forecast issued Wed 11:00 AM ET · 9h before departure
Watch this flight
Other days
Today
Thu 10/1 18%
Fri 10/2 19%
Sat 10/3 18%
Sun 10/4 18%
Mon 10/5 18%
Tue 10/6 14%
Odds over time
Arrive at ONT more than 15 minutes late?
31%
chance · ±0 pts
+17 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
31%
Leave 15+ late
36%
Arrive 1h+ late
9%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
12h
Now
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 16% · changed +17 pts in 24h
+17 pts
31%
Yes 31%
No 69%
Leave STS more than 15 minutes late?
Calm-weather odds: 18% · changed +21 pts in 24h
+21 pts
36%
Yes 36%
No 64%
Arrive at ONT more than an hour late?
Calm-weather odds: 6% · changed +3 pts in 24h
+3 pts
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 ONT?
On time or early
68%
15–30 min late
18%
30 min–1 hour late
4%
1–2 hours late
6%
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
↑
OO's recent on-time record
↑
Later flights pick up delays from earlier in the day
↑
Other factors
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at ONT
Weather at each end
STS (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
ONT (destination)
Gusts 17 kt Ceiling none (clear) Visibility 10+ 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.