Schedule: a typical summer Thursday (the flights of Jul 30, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 1321
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
G4 1321 · SFB → DAY
departs 6:18 PM ET · arrives 8:29 PM ET
Forecast issued Thu 10:00 PM ET · 4h after departure
Watch this flight
Odds over time
Arrive at DAY more than 15 minutes late?
33%
chance · ±0 pts
−8 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
33%
Leave 15+ late
40%
Arrive 1h+ late
16%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at DAY more than 15 minutes late?
Calm-weather odds: 39% · changed −8 pts in 24h
−8 pts
33%
Yes 33%
No 67%
Leave SFB more than 15 minutes late?
Calm-weather odds: 39% · changed −11 pts in 24h
−11 pts
40%
Yes 40%
No 60%
Arrive at DAY more than an hour late?
Calm-weather odds: 14% · changed −6 pts in 24h
−6 pts
16%
Yes 16%
No 84%
Cancelled?
Calm-weather odds: <1% · changed −2 pts in 24h
−2 pts
<1%
Yes <1%
No 99%
How late will it get to DAY?
On time or early
66%
15–30 min late
10%
30 min–1 hour late
7%
1–2 hours late
9%
Over 2 hours late
7%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Later flights pick up delays from earlier in the day
↑
G4's recent on-time record
↑
This flight has been late 32% of the time recently
↓
DAY usually runs smoothly
↓
Thursdays in October are usually quieter than average
Weather at each end
SFB (origin)
Gusts 23 kt Ceiling none (clear) Visibility 10+ mi Precip none
DAY (destination)
Gusts 21 kt Ceiling 11,600 ft Visibility 10+ mi Precip 0.01 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.