Schedule: a typical summer Tuesday (the flights of Jul 28, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
FRONTIER · FLIGHT F9 4131
SCHEDULED · TYPICAL SCHEDULE
Tuesday, September 29
F9 4131 · IAH → LAS
departs 1:17 PM CT · arrives 2:29 PM PT
Forecast issued Tue 10:00 PM ET · 8h after departure
Watch this flight
Other days
Tue 9/29
Today 56%
Sat 10/3 31%
Sun 10/4 33%
Mon 10/5 27%
Tue 10/6 18%
Wed 10/7 17%
Thu 10/8 25%
Odds over time
Arrive at LAS more than 15 minutes late?
56%
chance · ±0 pts
+25 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
56%
Leave 15+ late
47%
Arrive 1h+ late
22%
Cancelled
3%
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: 51% · changed +25 pts in 24h
+25 pts
56%
Yes 56%
No 44%
Leave IAH more than 15 minutes late?
Calm-weather odds: 43% · changed +22 pts in 24h
+22 pts
47%
Yes 47%
No 53%
Arrive at LAS more than an hour late?
Calm-weather odds: 25% · changed +13 pts in 24h
+13 pts
22%
Yes 22%
No 78%
Cancelled?
Calm-weather odds: 3% · changed +2 pts in 24h
+2 pts
3%
Yes 3%
No 97%
How late will it get to LAS?
On time or early
43%
15–30 min late
19%
30 min–1 hour late
14%
1–2 hours late
14%
Over 2 hours late
7%
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Gusts to 27 kt forecast at LAS that day
↑
LAS is prone to delays
↑
F9's recent on-time record
↓
Tuesdays in September are usually quieter than average
↓
IAH usually runs smoothly
Weather at each end
IAH (origin)
Gusts 26 kt Ceiling 4,000 ft Visibility 10+ mi Precip none
LAS (destination)
Gusts 27 kt Ceiling 4,700 ft Visibility 7 mi Precip 0.08 in
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.