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.
FRONTIER · FLIGHT F9 1283
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
F9 1283 · LAS → ONT
departs 7:00 AM PT · arrives 8:03 AM PT
Forecast issued Tue 7:00 PM ET · 39h before departure
Watch this flight
Other days
Today 23%
Wed 9/30 15%
Thu 10/1
Fri 10/2 16%
Sat 10/3 14%
Sun 10/4 17%
Mon 10/5 20%
Odds over time
Arrive at ONT more than 15 minutes late?
16%
chance · ±3 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
11%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at ONT more than 15 minutes late?
Calm-weather odds: 16% · changed +0 pts in 24h
+0 pts
16%
Yes 16%
No 84%
Leave LAS more than 15 minutes late?
Calm-weather odds: 11% · changed +0 pts in 24h
+0 pts
11%
Yes 11%
No 89%
Arrive at ONT more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
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
83%
15–30 min late
5%
30 min–1 hour late
5%
1–2 hours late
3%
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
↑
F9's recent on-time record
↑
Other factors
↑
LAS is prone to delays
↓
Early flights usually leave on time
↓
Mostly benign weather forecast at LAS
Weather at each end
LAS (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
ONT (destination)
Gusts 15 kt Ceiling none (clear) Visibility 4 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.