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 4131
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Yesterday
F9 4131 · IAH → LAS
departs 1:17 PM CT · arrives 2:29 PM PT
Forecast issued Wed 10:00 PM ET · 8h after departure
Watch this flight
Other days
Wed 9/30
Today 65%
Fri 10/2 33%
Sat 10/3 37%
Sun 10/4 28%
Mon 10/5 27%
Tue 10/6 18%
Wed 10/7 17%
Odds over time
Arrive at LAS more than 15 minutes late?
31%
chance · ±0 pts
−19 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
31%
Leave 15+ late
25%
Arrive 1h+ late
9%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 31% · changed −19 pts in 24h
−19 pts
31%
Yes 31%
No 69%
Leave IAH more than 15 minutes late?
Calm-weather odds: 25% · changed −14 pts in 24h
−14 pts
25%
Yes 25%
No 75%
Arrive at LAS more than an hour late?
Calm-weather odds: 9% · changed −10 pts in 24h
−10 pts
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: 1% · changed −2 pts in 24h
−2 pts
1%
Yes 1%
No 99%
How late will it get to LAS?
On time or early
68%
15–30 min late
12%
30 min–1 hour late
10%
1–2 hours late
6%
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
↑
LAS is prone to delays
↑
F9's recent on-time record
↑
This flight has been late 24% of the time recently
↓
Wednesdays in September are usually quieter than average
↓
Mostly benign weather forecast at LAS
Weather at each end
IAH (origin)
Gusts 26 kt Ceiling none (clear) Visibility 10+ mi Precip none
LAS (destination)
Gusts 18 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.