Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 1631
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Today
G4 1631 · LAS → BLV
departs 3:45 PM PT · arrives 9:08 PM CT
Forecast issued Sun 7:00 AM ET · 12h before departure
Watch this flight
Odds over time
Arrive at BLV more than 15 minutes late?
42%
chance · ±0 pts
+3 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
42%
Leave 15+ late
28%
Arrive 1h+ late
10%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
5.9d
2d
1d
Now
6h
Departs
Lands
Arrive at BLV more than 15 minutes late?
Calm-weather odds: 44% · changed +3 pts in 24h
+3 pts
42%
Yes 42%
No 58%
Leave LAS more than 15 minutes late?
Calm-weather odds: 21% · changed +5 pts in 24h
+5 pts
28%
Yes 28%
No 72%
Arrive at BLV more than an hour late?
Calm-weather odds: 10% · changed −1 pt in 24h
−1 pt
10%
Yes 10%
No 90%
Cancelled?
Calm-weather odds: <1% · changed +1 pt in 24h
+1 pt
1%
Yes 1%
No 99%
How late will it get to BLV?
On time or early
57%
15–30 min late
16%
30 min–1 hour late
16%
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
↑
G4's recent on-time record
↑
LAS is prone to delays
↑
3pm departures from LAS are often late
↓
Mostly benign weather forecast at LAS
↓
Mostly benign weather forecast at BLV
Weather at each end
LAS (origin)
Gusts 14 kt Ceiling none (clear) Visibility 10+ mi Precip none
BLV (destination)
Gusts 11 kt Ceiling none (clear) Visibility 3 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.