Schedule: a typical Thursday (the flights of Jul 30, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
FRONTIER · FLIGHT F9 4567
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1 Tomorrow
F9 4567 · STL → DEN
departs 8:08 PM CT · arrives 9:44 PM MT
Forecast issued Wed 11:00 AM ET · 34h before departure
Watch this flight
Other days
Today 40%
Thu 10/1
Fri 10/2 25%
Sat 10/3 23%
Sun 10/4 23%
Mon 10/5 26%
Tue 10/6 22%
Odds over time
Arrive at DEN more than 15 minutes late?
44%
chance · ±6 pts
+8 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
44%
Leave 15+ late
40%
Arrive 1h+ late
14%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 19% · changed +8 pts in 24h
+8 pts
44%
Yes 44%
No 56%
Leave STL more than 15 minutes late?
Calm-weather odds: 24% · changed +5 pts in 24h
+5 pts
40%
Yes 40%
No 60%
Arrive at DEN more than an hour late?
Calm-weather odds: 8% · changed +2 pts in 24h
+2 pts
14%
Yes 14%
No 86%
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
55%
15–30 min late
14%
30 min–1 hour late
15%
1–2 hours late
9%
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
↑
Cloud base down to 867 ft, 0.3 in of rain forecast at STL that day
↑
F9's recent on-time record
↑
Arrivals into DEN at that hour are often late
↓
STL usually runs smoothly
↓
Thursdays in October are usually quieter than average
Weather at each end
STL (origin)
Gusts 16 kt Ceiling 867 ft Visibility 4 mi Precip 0.32 in
DEN (destination)
Gusts 21 kt Ceiling 6,000 ft 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.