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 3378
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Today
F9 3378 · MIA → SJU
departs 9:33 PM ET · arrives 12:28 AM AT
Forecast issued Thu 9:00 AM ET · 13h before departure
Watch this flight
Other days
Today
Fri 10/2 36%
Sat 10/3 26%
Sun 10/4 23%
Mon 10/5 22%
Tue 10/6 23%
Wed 10/7 24%
Odds over time
Arrive at SJU more than 15 minutes late?
42%
chance · ±0 pts
+2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
42%
Leave 15+ late
52%
Arrive 1h+ late
29%
Cancelled
3%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.8d
2d
1d
Now
6h
Departs
Lands
Arrive at SJU more than 15 minutes late?
Calm-weather odds: 33% · changed +2 pts in 24h
+2 pts
42%
Yes 42%
No 58%
Leave MIA more than 15 minutes late?
Calm-weather odds: 42% · changed −1 pt in 24h
−1 pt
52%
Yes 52%
No 48%
Arrive at SJU more than an hour late?
Calm-weather odds: 16% · changed +7 pts in 24h
+7 pts
29%
Yes 29%
No 71%
Cancelled?
Calm-weather odds: 1% · changed −1 pt in 24h
−1 pt
3%
Yes 3%
No 97%
How late will it get to SJU?
On time or early
56%
15–30 min late
4%
30 min–1 hour late
9%
1–2 hours late
21%
Over 2 hours late
7%
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Gusts to 26 kt, 0.7 in of rain, thunderstorms forecast at MIA that day
↑
F9's recent on-time record
↑
9pm departures from MIA are often late
↓
Thursdays in October are usually quieter than average
↓
SJU usually runs smoothly
Weather at each end
MIA (origin)
Gusts 25 kt Ceiling 2,000 ft Visibility 7 mi Precip 0.63 in
SJU (destination)
Gusts 16 kt Ceiling 3,200 ft Visibility 10+ mi Precip 0.14 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.