Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
FRONTIER · FLIGHT F9 3981
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
F9 3981 · DEN → SLC
departs 1:18 PM MT · arrives 2:55 PM MT
Forecast issued Fri 4:00 PM ET · 1h after departure
Watch this flight
Other days
Today
Sat 10/3 22%
Sun 10/4 10%
Mon 10/5 18%
Odds over time
Arrive at SLC more than 15 minutes late?
22%
chance · ±0 pts
−2 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
22%
Leave 15+ late
24%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
3.7d
2d
1d
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 20% · changed −2 pts in 24h
−2 pts
22%
Yes 22%
No 78%
Leave DEN more than 15 minutes late?
Calm-weather odds: 24% · changed −2 pts in 24h
−2 pts
24%
Yes 24%
No 76%
Arrive at SLC more than an hour late?
Calm-weather odds: 6% · changed +0 pts in 24h
+0 pts
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SLC?
On time or early
78%
15–30 min late
8%
30 min–1 hour late
7%
1–2 hours late
4%
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
↑
1pm departures from DEN are often late
↑
DEN is busy at that time
↓
Gusts to 31 kt forecast at DEN that day
↓
Mostly benign weather forecast at SLC
Weather at each end
DEN (origin)
Gusts 31 kt Ceiling none (clear) Visibility 10+ mi Precip none
SLC (destination)
Gusts 12 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.