Schedule: a typical Tuesday (the flights of Jul 28, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
FRONTIER · FLIGHT F9 3923
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29
F9 3923 · ATL → LAS
departs 7:11 PM ET · arrives 8:26 PM PT
Forecast issued Tue 10:00 PM ET · 3h after departure
Watch this flight
Other days
Tue 9/29
Today 37%
Fri 10/2 44%
Sat 10/3 46%
Sun 10/4 37%
Mon 10/5 37%
Tue 10/6 30%
Wed 10/7 27%
Odds over time
Arrive at LAS more than 15 minutes late?
47%
chance · ±1 pts
+12 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
47%
Leave 15+ late
47%
Arrive 1h+ late
16%
Cancelled
2%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.7d
2d
1d
12h
6h
Departs
Now
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 46% · changed +12 pts in 24h
+12 pts
47%
Yes 47%
No 53%
Leave ATL more than 15 minutes late?
Calm-weather odds: 47% · changed +15 pts in 24h
+15 pts
47%
Yes 47%
No 53%
Arrive at LAS more than an hour late?
Calm-weather odds: 16% · changed +5 pts in 24h
+5 pts
16%
Yes 16%
No 84%
Cancelled?
Calm-weather odds: 2% · changed +1 pt in 24h
+1 pt
2%
Yes 2%
No 98%
How late will it get to LAS?
On time or early
52%
15–30 min late
11%
30 min–1 hour late
20%
1–2 hours late
10%
Over 2 hours late
6%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
This flight has been late 38% of the time recently
↑
Arrivals into LAS at that hour are often late
↑
F9's recent on-time record
↓
Mostly benign weather forecast at ATL
↓
Tuesdays in September are usually quieter than average
Weather at each end
ATL (origin)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
LAS (destination)
Gusts 27 kt Ceiling 4,700 ft Visibility 7 mi Precip 0.08 in
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.