Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
FRONTIER · FLIGHT F9 4552
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
F9 4552 · LAS → MIA
departs 10:29 PM PT · arrives 6:30 AM ET
Forecast issued Wed 9:00 PM ET · 4h before departure
Watch this flight
Other days
Today
Thu 10/1 37%
Fri 10/2 30%
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?
28%
chance · ±0 pts
+0 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
28%
Leave 15+ late
33%
Arrive 1h+ late
14%
Cancelled
2%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.7d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at MIA more than 15 minutes late?
Calm-weather odds: 21% · changed +0 pts in 24h
+0 pts
28%
Yes 28%
No 72%
Leave LAS more than 15 minutes late?
Calm-weather odds: 27% · changed +5 pts in 24h
+5 pts
33%
Yes 33%
No 67%
Arrive at MIA more than an hour late?
Calm-weather odds: 10% · changed +1 pt in 24h
+1 pt
14%
Yes 14%
No 86%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
How late will it get to MIA?
On time or early
71%
15–30 min late
2%
30 min–1 hour late
10%
1–2 hours late
10%
Over 2 hours late
4%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Mostly benign weather forecast at MIA
↑
F9's recent on-time record
↑
This flight has been late 28% of the time recently
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at LAS
Weather at each end
LAS (origin)
Gusts 18 kt Ceiling none (clear) Visibility 10+ mi Precip none
MIA (destination)
Gusts 18 kt Ceiling 2,800 ft Visibility 6 mi Precip 0.20 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.