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 3923
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2
F9 3923 · ATL → LAS
departs 7:11 PM ET · arrives 8:26 PM PT
Forecast issued Fri 10:00 PM ET · 3h after departure
Watch this flight
Other days
Fri 10/2
Today 56%
Mon 10/5 35%
Fri 10/9 43%
Odds over time
Arrive at LAS more than 15 minutes late?
39%
chance · ±1 pts
−4 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
39%
Leave 15+ late
50%
Arrive 1h+ late
16%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
3.9d
2d
1d
12h
6h
Departs
Now
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 41% · changed −4 pts in 24h
−4 pts
39%
Yes 39%
No 61%
Leave ATL more than 15 minutes late?
Calm-weather odds: 48% · changed +1 pt in 24h
+1 pt
50%
Yes 50%
No 50%
Arrive at LAS more than an hour late?
Calm-weather odds: 15% · changed −9 pts in 24h
−9 pts
16%
Yes 16%
No 84%
Cancelled?
Calm-weather odds: 1% · changed −1 pt in 24h
−1 pt
1%
Yes 1%
No 99%
How late will it get to LAS?
On time or early
60%
15–30 min late
13%
30 min–1 hour late
10%
1–2 hours late
8%
Over 2 hours late
8%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
This flight has been late 39% of the time recently
↑
F9's recent on-time record
↑
7pm departures from ATL are often late
↓
Mostly benign weather forecast at LAS
↓
Cloud base down to 600 ft forecast at ATL that day
Weather at each end
ATL (origin)
Gusts 8 kt Ceiling 600 ft Visibility 5 mi Precip none
LAS (destination)
Gusts 7 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.