Schedule: a typical summer Tuesday (the flights of Jul 28, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
SKYWEST · FLIGHT OO 5471
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29
OO 5471 · SFO → ONT
departs 1:50 PM PT · arrives 3:29 PM PT
Forecast issued Tue 10:00 PM ET · 5h after departure
Watch this flight
Odds over time
Arrive at ONT more than 15 minutes late?
25%
chance · ±0 pts
−3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
25%
Leave 15+ late
28%
Arrive 1h+ late
9%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 25% · changed −3 pts in 24h
−3 pts
25%
Yes 25%
No 75%
Leave SFO more than 15 minutes late?
Calm-weather odds: 28% · changed +1 pt in 24h
+1 pt
28%
Yes 28%
No 72%
Arrive at ONT more than an hour late?
Calm-weather odds: 9% · changed +0 pts in 24h
+0 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
74%
15–30 min late
7%
30 min–1 hour late
8%
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
↑
1pm departures from SFO are often late
↑
This flight has been late 27% of the time recently
↑
SFO is busy at that time
↓
Mostly benign weather forecast at SFO
↓
Tuesdays in September are usually quieter than average
Weather at each end
SFO (origin)
Gusts 19 kt Ceiling none (clear) Visibility 10+ mi Precip none
ONT (destination)
Gusts 19 kt Ceiling none (clear) 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.