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 4031
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
OO 4031 · ONT → SEA
departs 6:01 PM PT · arrives 8:50 PM PT
Forecast issued Wed 9:00 AM ET · 36h before departure
Watch this flight
Other days
Today 20%
Thu 10/1
Fri 10/2 9%
Sat 10/3 10%
Sun 10/4 11%
Mon 10/5 10%
Tue 10/6 8%
Odds over time
Arrive at SEA more than 15 minutes late?
10%
chance · ±1 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
10%
Leave 15+ late
13%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
2.8d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at SEA more than 15 minutes late?
Calm-weather odds: 8% · changed +0 pts in 24h
+0 pts
10%
Yes 10%
No 90%
Leave ONT more than 15 minutes late?
Calm-weather odds: 11% · changed +0 pts in 24h
+0 pts
13%
Yes 13%
No 87%
Arrive at SEA more than an hour late?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
4%
Yes 4%
No 96%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to SEA?
On time or early
90%
15–30 min late
2%
30 min–1 hour late
4%
1–2 hours late
2%
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
↑
Arrivals into SEA at that hour are often late
↑
Later flights pick up delays from earlier in the day
↑
SEA is busy at that time
↓
This flight has been late 11% of the time recently
↓
Mostly benign weather forecast at SEA
Weather at each end
ONT (origin)
Gusts 16 kt Ceiling none (clear) Visibility 5 mi Precip none
SEA (destination)
Gusts 7 kt Ceiling 7,000 ft Visibility 8 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.