Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
FRONTIER · FLIGHT F9 3872
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Yesterday
F9 3872 · PHX → SLC
departs 9:14 AM MT · arrives 11:52 AM MT
Forecast issued Wed 10:00 PM ET · 10h after departure
Watch this flight
Other days
Wed 9/30
Today 14%
Fri 10/2 13%
Sat 10/3 9%
Sun 10/4 13%
Mon 10/5 12%
Tue 10/6 10%
Wed 10/7 10%
Odds over time
Arrive at SLC more than 15 minutes late?
18%
chance · ±0 pts
+1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
18%
Leave 15+ late
13%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at SLC more than 15 minutes late?
Calm-weather odds: 18% · changed +1 pt in 24h
+1 pt
18%
Yes 18%
No 82%
Leave PHX more than 15 minutes late?
Calm-weather odds: 13% · changed +0 pts in 24h
+0 pts
13%
Yes 13%
No 87%
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
82%
15–30 min late
9%
30 min–1 hour late
2%
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
↑
PHX is busy at that time
↑
Other factors
↓
Wednesdays in September are usually quieter than average
↓
Early flights usually leave on time
Weather at each end
PHX (origin)
Gusts 9 kt Ceiling 11,000 ft Visibility 10+ mi Precip none
SLC (destination)
Gusts 17 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.