Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
FRONTIER · FLIGHT F9 4345
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
F9 4345 · DEN → LAX
departs 10:39 PM MT · arrives 12:11 AM PT
Forecast issued Wed 2:00 PM ET · 11h before departure
Watch this flight
Other days
Today
Thu 10/1 30%
Fri 10/2 28%
Sat 10/3 26%
Sun 10/4 30%
Mon 10/5 26%
Tue 10/6 16%
Odds over time
Arrive at LAX more than 15 minutes late?
21%
chance · ±0 pts
−18 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
21%
Leave 15+ late
30%
Arrive 1h+ late
6%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
Now
6h
Departs
Lands
Arrive at LAX more than 15 minutes late?
Calm-weather odds: 16% · changed −18 pts in 24h
−18 pts
21%
Yes 21%
No 79%
Leave DEN more than 15 minutes late?
Calm-weather odds: 24% · changed −17 pts in 24h
−17 pts
30%
Yes 30%
No 70%
Arrive at LAX more than an hour late?
Calm-weather odds: 5% · changed −10 pts in 24h
−10 pts
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
<1%
Yes <1%
No 99%
How late will it get to LAX?
On time or early
79%
15–30 min late
2%
30 min–1 hour late
13%
1–2 hours late
3%
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
↑
10pm departures from DEN are often late
↑
DEN is busy at that time
↓
Wednesdays in September are usually quieter than average
↓
Cloud base down to 1,000 ft forecast at LAX that day
Weather at each end
DEN (origin)
Gusts 15 kt Ceiling 7,000 ft Visibility 10+ mi Precip 0.04 in
LAX (destination)
Gusts 11 kt Ceiling 1,000 ft Visibility 7 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.