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 3884
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
OO 3884 · SEA → ONT
departs 7:59 PM PT · arrives 10:52 PM PT
Forecast issued Wed 3:00 PM ET · 32h before departure
Watch this flight
Other days
Today 20%
Thu 10/1
Fri 10/2 18%
Sat 10/3 14%
Sun 10/4 20%
Mon 10/5 15%
Tue 10/6 12%
Odds over time
Arrive at ONT more than 15 minutes late?
19%
chance · ±0 pts
+4 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
19%
Leave 15+ late
24%
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 ONT more than 15 minutes late?
Calm-weather odds: 15% · changed +4 pts in 24h
+4 pts
19%
Yes 19%
No 81%
Leave SEA more than 15 minutes late?
Calm-weather odds: 22% · changed +8 pts in 24h
+8 pts
24%
Yes 24%
No 76%
Arrive at ONT 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 ONT?
On time or early
81%
15–30 min late
9%
30 min–1 hour late
5%
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
↑
Later flights pick up delays from earlier in the day
↑
OO's recent on-time record
↑
7pm departures from SEA are often late
↓
Mostly benign weather forecast at SEA
↓
This flight has been late 18% of the time recently
Weather at each end
SEA (origin)
Gusts 7 kt Ceiling 7,000 ft Visibility 8 mi Precip none
ONT (destination)
Gusts 16 kt Ceiling none (clear) 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.