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 3377
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
F9 3377 · SJU → MIA
departs 7:30 AM AT · arrives 10:15 AM ET
Forecast issued Fri 5:00 PM ET · 62h before departure
Watch this flight
Other days
Today 15%
Sat 10/3 12%
Sun 10/4 13%
Mon 10/5
Tue 10/6 10%
Wed 10/7 10%
Odds over time
Arrive at MIA more than 15 minutes late?
12%
chance · ±1 pts
−3 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
12%
Leave 15+ late
12%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
6.3d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at MIA more than 15 minutes late?
Calm-weather odds: 14% · changed −3 pts in 24h
−3 pts
12%
Yes 12%
No 88%
Leave SJU more than 15 minutes late?
Calm-weather odds: 13% · changed −1 pt in 24h
−1 pt
12%
Yes 12%
No 88%
Arrive at MIA more than an hour late?
Calm-weather odds: 5% · changed −1 pt in 24h
−1 pt
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: 1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 99%
How late will it get to MIA?
On time or early
87%
15–30 min late
0%
30 min–1 hour late
8%
1–2 hours late
2%
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
↑
Other factors
↓
Early flights usually leave on time
↓
Thunderstorms forecast at MIA that day
Weather at each end
SJU (origin)
Gusts 13 kt Ceiling 2,000 ft Visibility 10+ mi Precip 0.02 in
MIA (destination)
Gusts 15 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.