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 1591
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
G4 1591 · BOI → SNA
departs 3:07 PM MT · arrives 4:21 PM PT
Forecast issued Fri 11:00 AM ET · 54h before departure
Watch this flight
Other days
Sat 10/3 30%
Sun 10/4
Odds over time
Arrive at SNA more than 15 minutes late?
37%
chance · ±2 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
37%
Leave 15+ late
27%
Arrive 1h+ late
10%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.8d
Now
1d
12h
6h
Departs
Lands
Arrive at SNA more than 15 minutes late?
Calm-weather odds: 33% · changed – in 24h
–
37%
Yes 37%
No 63%
Leave BOI more than 15 minutes late?
Calm-weather odds: 27% · changed – in 24h
–
27%
Yes 27%
No 73%
Arrive at SNA more than an hour late?
Calm-weather odds: 7% · changed – in 24h
–
10%
Yes 10%
No 90%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to SNA?
On time or early
63%
15–30 min late
23%
30 min–1 hour late
4%
1–2 hours late
7%
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
↑
This flight has been late 33% of the time recently
↑
SNA is prone to delays
↓
Mostly benign weather forecast at BOI
↓
Mostly benign weather forecast at SNA
Weather at each end
BOI (origin)
Gusts 10 kt Ceiling none (clear) Visibility 10+ mi Precip none
SNA (destination)
Gusts 14 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.