Schedule: a typical summer Saturday (the flights of Jul 25, 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
Saturday, October 3 Tomorrow
F9 1230 · SFO → DEN
departs 6:00 AM PT · arrives 9:46 AM MT
Forecast issued Fri 3:00 PM ET · 18h before departure
Watch this flight
Other days
Today 9%
Sat 10/3
Sun 10/4 10%
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?
11%
chance · ±0 pts
−2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
11%
Leave 15+ late
10%
Arrive 1h+ late
4%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
4.5d
2d
1d
Now
12h
6h
Departs
Lands
Arrive at DEN more than 15 minutes late?
Calm-weather odds: 10% · changed −2 pts in 24h
−2 pts
11%
Yes 11%
No 89%
Leave SFO more than 15 minutes late?
Calm-weather odds: 10% · changed +0 pts in 24h
+0 pts
10%
Yes 10%
No 90%
Arrive at DEN more than an hour late?
Calm-weather odds: 3% · 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
88%
15–30 min late
4%
30 min–1 hour late
3%
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 12 kt Ceiling none (clear) Visibility 5 mi Precip none
DEN (destination)
Gusts 24 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.