Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
FRONTIER · FLIGHT F9 4552
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29 Yesterday
F9 4552 · LAS → MIA
departs 10:29 PM PT · arrives 6:30 AM ET
Forecast issued Tue 10:00 PM ET · 4h before departure
Watch this flight
Other days
Tue 9/29
Today 25%
Thu 10/1 28%
Sat 10/3 18%
Sun 10/4 28%
Mon 10/5 27%
Tue 10/6 14%
Odds over time
Arrive at MIA more than 15 minutes late?
35%
chance · ±0 pts
+11 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
35%
Leave 15+ late
35%
Arrive 1h+ late
18%
Cancelled
4%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.7d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at MIA more than 15 minutes late?
Calm-weather odds: 29% · changed +11 pts in 24h
+11 pts
35%
Yes 35%
No 65%
Leave LAS more than 15 minutes late?
Calm-weather odds: 35% · changed +8 pts in 24h
+8 pts
35%
Yes 35%
No 65%
Arrive at MIA more than an hour late?
Calm-weather odds: 16% · changed +8 pts in 24h
+8 pts
18%
Yes 18%
No 82%
Cancelled?
Calm-weather odds: 2% · changed +1 pt in 24h
+1 pt
4%
Yes 4%
No 96%
How late will it get to MIA?
On time or early
63%
15–30 min late
9%
30 min–1 hour late
8%
1–2 hours late
13%
Over 2 hours late
4%
Cancelled
4%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Visibility down to 0.5 mi, 1.2 in of rain, thunderstorms forecast at MIA that day
↑
F9's recent on-time record
↑
10pm departures from LAS are often late
↓
Tuesdays in September are usually quieter than average
↓
Other factors
Weather at each end
LAS (origin)
Gusts 27 kt Ceiling 4,700 ft Visibility 7 mi Precip 0.08 in
MIA (destination)
Gusts 8 kt Ceiling 1,600 ft Visibility 0.5 mi Precip 1.21 in
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.