Schedule: the flights that flew on Friday, Oct 23, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
FRONTIER · FLIGHT F9 4251
SCHEDULED · TYPICAL SCHEDULE
Friday, October 30
F9 4251 · DEN → SLC
departs 10:39 PM MT · arrives 12:18 AM MT
Forecast issued Wed 7:00 AM ET · 66h before departure
Watch this flight
Other days
Today 16%
Thu 10/29 25%
Fri 10/30
Sat 10/31 15%
Sun 11/1 26%
Mon 11/2 22%
Tue 11/3 25%
Odds over time
Arrive at SLC more than 15 minutes late?
28%
chance · ±7 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
28%
Leave 15+ late
30%
Arrive 1h+ late
7%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
7.0d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 24% · changed – in 24h
–
28%
Yes 28%
No 72%
Leave DEN more than 15 minutes late?
Calm-weather odds: 28% · changed – in 24h
–
30%
Yes 30%
No 70%
Arrive at SLC more than an hour late?
Calm-weather odds: 7% · changed – in 24h
–
7%
Yes 7%
No 93%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to SLC?
On time or early
72%
15–30 min late
17%
30 min–1 hour late
4%
1–2 hours late
5%
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
No breakdown for this forecast yet.
Weather at each end
DEN (origin)
Gusts 15 kt Ceiling none (clear) Visibility 10+ mi Precip none
SLC (destination)
Gusts 17 kt Ceiling 7,000 ft 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.