Schedule: a typical summer Thursday (the flights of Jul 30, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
FRONTIER · FLIGHT F9 3933
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Yesterday
F9 3933 · DEN → BOI
departs 10:29 AM MT · arrives 12:29 PM MT
Forecast issued Thu 10:00 PM ET · 10h after departure
Watch this flight
Other days
Thu 10/1
Sun 10/4 17%
Odds over time
Arrive at BOI more than 15 minutes late?
23%
chance · ±1 pts
−1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
23%
Leave 15+ late
24%
Arrive 1h+ late
8%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at BOI more than 15 minutes late?
Calm-weather odds: 22% · changed −1 pt in 24h
−1 pt
23%
Yes 23%
No 77%
Leave DEN more than 15 minutes late?
Calm-weather odds: 24% · changed +0 pts in 24h
+0 pts
24%
Yes 24%
No 76%
Arrive at BOI more than an hour late?
Calm-weather odds: 8% · changed +1 pt in 24h
+1 pt
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to BOI?
On time or early
77%
15–30 min late
13%
30 min–1 hour late
3%
1–2 hours late
6%
Over 2 hours late
2%
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
↑
DEN is busy at that time
↑
10am departures from DEN are often late
↓
Mostly benign weather forecast at DEN
↓
Mostly benign weather forecast at BOI
Weather at each end
DEN (origin)
Gusts 21 kt Ceiling 7,000 ft Visibility 10+ mi Precip none
BOI (destination)
Gusts 7 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.