Schedule: a typical summer Sunday (the flights of Jul 26, 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
Sunday, October 4 Today
F9 3937 · SJU → BDL
departs 8:45 AM AT · arrives 12:47 PM ET
Forecast issued Sun 9:00 AM ET · 0h before departure
Watch this flight
Other days
Today
Mon 10/5 28%
Wed 10/7 36%
Fri 10/9 28%
Odds over time
Arrive at BDL more than 15 minutes late?
21%
chance · ±1 pts
−4 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
21%
Leave 15+ late
19%
Arrive 1h+ late
9%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.4d
2d
1d
12h
6h
Departs
Lands
Arrive at BDL more than 15 minutes late?
Calm-weather odds: 25% · changed −4 pts in 24h
−4 pts
21%
Yes 21%
No 79%
Leave SJU more than 15 minutes late?
Calm-weather odds: 17% · changed +3 pts in 24h
+3 pts
19%
Yes 19%
No 81%
Arrive at BDL more than an hour late?
Calm-weather odds: 9% · changed +0 pts in 24h
+0 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
78%
15–30 min late
8%
30 min–1 hour late
4%
1–2 hours late
4%
Over 2 hours late
5%
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
↑
Other factors
↓
8am departures from SJU are usually not late
↓
Early flights usually leave on time
Weather at each end
SJU (origin)
Gusts 12 kt Ceiling none (clear) Visibility 10+ mi Precip 0.26 in
BDL (destination)
Gusts 10 kt Ceiling 200 ft Visibility 2 mi Precip 0.03 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.