Schedule: a typical summer Saturday (the flights of Jul 25, 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
Saturday, October 3 Tomorrow
G4 1591 · BOI → SNA
departs 2:20 PM MT · arrives 3:34 PM PT
Forecast issued Fri 1:00 PM ET · 27h before departure
Watch this flight
Other days
Sat 10/3
Sun 10/4 37%
Odds over time
Arrive at SNA more than 15 minutes late?
31%
chance · ±1 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
31%
Leave 15+ late
22%
Arrive 1h+ late
9%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
4.8d
2d
Now
12h
6h
Departs
Lands
Arrive at SNA more than 15 minutes late?
Calm-weather odds: 27% · changed +0 pts in 24h
+0 pts
31%
Yes 31%
No 69%
Leave BOI more than 15 minutes late?
Calm-weather odds: 22% · changed +0 pts in 24h
+0 pts
22%
Yes 22%
No 78%
Arrive at SNA more than an hour late?
Calm-weather odds: 7% · changed +0 pts in 24h
+0 pts
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to SNA?
On time or early
68%
15–30 min late
18%
30 min–1 hour late
4%
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
↑
This flight has been late 33% of the time recently
↑
G4's recent on-time record
↑
SNA is prone to delays
↓
Mostly benign weather forecast at BOI
↓
Mostly benign weather forecast at SNA
Weather at each end
BOI (origin)
Gusts 8 kt Ceiling none (clear) Visibility 10+ mi Precip none
SNA (destination)
Gusts 14 kt Ceiling none (clear) Visibility 9 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.