Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
FRONTIER · FLIGHT F9 3599
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Tomorrow
F9 3599 · ATL → DEN
departs 8:53 PM ET · arrives 10:28 PM MT
Forecast issued Sun 4:00 PM ET · 29h before departure
Watch this flight
Other days
Today 87%
Mon 10/5
Tue 10/6 15%
Wed 10/7 18%
Thu 10/8 21%
Fri 10/9 29%
Sat 10/10 24%
Odds over time
Arrive at DEN more than 15 minutes late?
41%
chance · ±4 pts
+6 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
41%
Leave 15+ late
47%
Arrive 1h+ late
13%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.9d
2d
Now
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 25% · changed +6 pts in 24h
+6 pts
41%
Yes 41%
No 59%
Leave ATL more than 15 minutes late?
Calm-weather odds: 37% · changed +9 pts in 24h
+9 pts
47%
Yes 47%
No 53%
Arrive at DEN more than an hour late?
Calm-weather odds: 8% · changed +1 pt in 24h
+1 pt
13%
Yes 13%
No 87%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
1%
Yes 1%
No 99%
How late will it get to DEN?
On time or early
58%
15–30 min late
15%
30 min–1 hour late
13%
1–2 hours late
7%
Over 2 hours late
5%
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
↑
8pm departures from ATL are often late
↑
This flight has been late 34% of the time recently
↓
Mondays in October are usually quieter than average
↓
Mostly benign weather forecast at DEN
Weather at each end
ATL (origin)
Gusts 11 kt Ceiling 300 ft Visibility 4 mi Precip 0.14 in
DEN (destination)
Gusts 19 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.