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 4103
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
F9 4103 · LAS → SJC
departs 11:39 AM PT · arrives 1:17 PM PT
Forecast issued Tue 6:00 PM ET · 45h before departure
Watch this flight
Other days
Thu 10/1
Fri 10/2 22%
Sat 10/3 16%
Sun 10/4 23%
Mon 10/5 20%
Odds over time
Arrive at SJC more than 15 minutes late?
15%
chance · ±3 pts
−2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
15%
Leave 15+ late
21%
Arrive 1h+ late
8%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
2.9d
Now
1d
12h
6h
Departs
Lands
Arrive at SJC more than 15 minutes late?
Calm-weather odds: 18% · changed −2 pts in 24h
−2 pts
15%
Yes 15%
No 85%
Leave LAS more than 15 minutes late?
Calm-weather odds: 19% · changed +2 pts in 24h
+2 pts
21%
Yes 21%
No 79%
Arrive at SJC more than an hour late?
Calm-weather odds: 7% · changed +0 pts in 24h
+0 pts
8%
Yes 8%
No 92%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SJC?
On time or early
85%
15–30 min late
0%
30 min–1 hour late
7%
1–2 hours late
5%
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
↑
LAS is prone to delays
↑
11am departures from LAS are often late
↓
Mostly benign weather forecast at LAS
↓
SJC usually runs smoothly
Weather at each end
LAS (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
SJC (destination)
Gusts 11 kt Ceiling 1,200 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.