Schedule: the flights that flew on Thursday, Oct 22, 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
Thursday, October 29 Tomorrow
F9 4251 · DEN → SLC
departs 10:47 PM MT · arrives 12:27 AM MT
Forecast issued Wed 7:00 AM ET · 42h before departure
Watch this flight
Other days
Today 16%
Thu 10/29
Fri 10/30 28%
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?
25%
chance · ±8 pts
−1 pt · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
25%
Leave 15+ late
31%
Arrive 1h+ late
8%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
7.0d
Now
1d
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 24% · changed −1 pt in 24h
−1 pt
25%
Yes 25%
No 75%
Leave DEN more than 15 minutes late?
Calm-weather odds: 30% · changed +0 pts in 24h
+0 pts
31%
Yes 31%
No 69%
Arrive at SLC 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 SLC?
On time or early
74%
15–30 min late
12%
30 min–1 hour late
6%
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
↑
Later flights pick up delays from earlier in the day
↑
DEN is busy at that time
↓
Mostly benign weather forecast at DEN
↓
Mostly benign weather forecast at SLC
Weather at each end
DEN (origin)
Gusts 13 kt Ceiling none (clear) Visibility 10+ mi Precip none
SLC (destination)
Gusts 10 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.