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 3937
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Tomorrow
F9 3937 · SJU → BDL
departs 8:45 AM AT · arrives 12:47 PM ET
Forecast issued Sun 7:00 AM ET · 26h before departure
Watch this flight
Other days
Today 35%
Mon 10/5
Wed 10/7 36%
Fri 10/9 28%
Odds over time
Arrive at BDL more than 15 minutes late?
25%
chance · ±3 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
25%
Leave 15+ late
19%
Arrive 1h+ late
9%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.4d
2d
Now
12h
6h
Departs
Lands
Arrive at BDL more than 15 minutes late?
Calm-weather odds: 24% · changed +0 pts in 24h
+0 pts
25%
Yes 25%
No 75%
Leave SJU more than 15 minutes late?
Calm-weather odds: 16% · changed +0 pts in 24h
+0 pts
19%
Yes 19%
No 81%
Arrive at BDL more than an hour late?
Calm-weather odds: 8% · changed +2 pts in 24h
+2 pts
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: 1% · changed +0 pts in 24h
+0 pts
1%
Yes 1%
No 99%
How late will it get to BDL?
On time or early
74%
15–30 min late
8%
30 min–1 hour late
8%
1–2 hours late
6%
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
↑
This flight has been late 26% of the time recently
↑
SJU is prone to delays
↓
Early flights usually leave on time
↓
8am departures from SJU are usually not late
Weather at each end
SJU (origin)
Gusts 13 kt Ceiling none (clear) Visibility 10+ mi Precip 0.03 in
BDL (destination)
Gusts 24 kt Ceiling 6,333 ft Visibility 10+ mi Precip 0.01 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.