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 1230
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
F9 1230 · SFO → DEN
departs 6:00 AM PT · arrives 9:46 AM MT
Forecast issued Fri 5:00 PM ET · 8h after departure
Watch this flight
Other days
Today
Sat 10/3 11%
Sun 10/4 9%
Mon 10/5 10%
Tue 10/6 8%
Wed 10/7 8%
Thu 10/8 11%
Odds over time
Arrive at DEN more than 15 minutes late?
9%
chance · ±0 pts
−3 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
9%
Leave 15+ late
8%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
3.5d
2d
1d
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 9% · changed −3 pts in 24h
−3 pts
9%
Yes 9%
No 91%
Leave SFO more than 15 minutes late?
Calm-weather odds: 8% · changed −1 pt in 24h
−1 pt
8%
Yes 8%
No 92%
Arrive at DEN more than an hour late?
Calm-weather odds: 4% · changed +0 pts in 24h
+0 pts
4%
Yes 4%
No 96%
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
91%
15–30 min late
<1%
30 min–1 hour late
5%
1–2 hours late
2%
Over 2 hours late
2%
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
↑
This flight has been late 12% of the time recently
↑
DEN is busy at that time
↓
Early flights usually leave on time
↓
6am departures from SFO are usually not late
Weather at each end
SFO (origin)
Gusts 9 kt Ceiling 300 ft Visibility 3 mi Precip none
DEN (destination)
Gusts 28 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.