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.
FRONTIER · FLIGHT F9 4758
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3
F9 4758 · ONT → LAS
departs 3:40 PM PT · arrives 4:51 PM PT
Forecast issued Thu 5:00 PM ET · 50h before departure
Watch this flight
Other days
Today 33%
Fri 10/2 30%
Sat 10/3
Sun 10/4 27%
Mon 10/5 24%
Tue 10/6 17%
Wed 10/7 16%
Odds over time
Arrive at LAS more than 15 minutes late?
24%
chance · ±3 pts
−2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
24%
Leave 15+ late
26%
Arrive 1h+ late
9%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
4.9d
Now
1d
12h
6h
Departs
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 17% · changed −2 pts in 24h
−2 pts
24%
Yes 24%
No 76%
Leave ONT more than 15 minutes late?
Calm-weather odds: 18% · changed −1 pt in 24h
−1 pt
26%
Yes 26%
No 74%
Arrive at LAS more than an hour late?
Calm-weather odds: 6% · 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 LAS?
On time or early
75%
15–30 min late
12%
30 min–1 hour late
3%
1–2 hours late
4%
Over 2 hours late
4%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
F9's recent on-time record
↑
LAS is prone to delays
↑
Later flights pick up delays from earlier in the day
↓
Mostly benign weather forecast at LAS
↓
Saturdays in October are usually quieter than average
Weather at each end
ONT (origin)
Gusts 14 kt Ceiling none (clear) Visibility 10+ mi Precip none
LAS (destination)
Gusts 11 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.