Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
FRONTIER · FLIGHT F9 1500
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
F9 1500 · ONT → DEN
departs 6:00 AM PT · arrives 9:24 AM MT
Forecast issued Fri 5:00 PM ET · 64h before departure
Watch this flight
Other days
Today 12%
Sat 10/3 11%
Sun 10/4 11%
Mon 10/5
Tue 10/6 12%
Wed 10/7 12%
Thu 10/8 14%
Odds over time
Arrive at DEN more than 15 minutes late?
12%
chance · ±2 pts
−2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
12%
Leave 15+ late
11%
Arrive 1h+ late
4%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
6.4d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 12% · changed −2 pts in 24h
−2 pts
12%
Yes 12%
No 88%
Leave ONT more than 15 minutes late?
Calm-weather odds: 10% · changed +2 pts in 24h
+2 pts
11%
Yes 11%
No 89%
Arrive at DEN 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 99%
How late will it get to DEN?
On time or early
88%
15–30 min late
4%
30 min–1 hour late
4%
1–2 hours late
<1%
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
↑
F9's recent on-time record
↑
ONT is prone to delays
↓
Early flights usually leave on time
↓
Mostly benign weather forecast at DEN
Weather at each end
ONT (origin)
Gusts 13 kt Ceiling none (clear) Visibility 10+ mi Precip none
DEN (destination)
Gusts 18 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.