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 4989
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2
F9 4989 · DEN → SAN
departs 10:29 PM MT · arrives 11:51 PM PT
Forecast issued Fri 10:00 PM ET · 2h before departure
Watch this flight
Other days
Fri 10/2
Today 69%
Mon 10/5 31%
Fri 10/9 29%
Odds over time
Arrive at SAN more than 15 minutes late?
64%
chance · ±0 pts
+27 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
64%
Leave 15+ late
64%
Arrive 1h+ late
16%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
4.1d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at SAN more than 15 minutes late?
Calm-weather odds: 30% · changed +27 pts in 24h
+27 pts
64%
Yes 64%
No 36%
Leave DEN more than 15 minutes late?
Calm-weather odds: 34% · changed +30 pts in 24h
+30 pts
64%
Yes 64%
No 36%
Arrive at SAN more than an hour late?
Calm-weather odds: 9% · changed +7 pts in 24h
+7 pts
16%
Yes 16%
No 84%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
1%
Yes 1%
No 99%
How late will it get to SAN?
On time or early
35%
15–30 min late
46%
30 min–1 hour late
1%
1–2 hours late
13%
Over 2 hours late
3%
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
↑
Later flights pick up delays from earlier in the day
↑
SAN is prone to delays
↓
Mostly benign weather forecast at DEN
↓
DEN usually runs smoothly
Weather at each end
DEN (origin)
Gusts 17 kt Ceiling none (clear) Visibility 10+ mi Precip none
SAN (destination)
Gusts 19 kt Ceiling 300 ft Visibility 2.5 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.