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 327
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Today
G4 327 · SFB → GRR
departs 6:11 PM ET · arrives 8:44 PM ET
Forecast issued Sun 7:00 AM ET · 11h before departure
Watch this flight
Odds over time
Arrive at GRR more than 15 minutes late?
54%
chance · ±0 pts
+12 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
54%
Leave 15+ late
35%
Arrive 1h+ late
15%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
5.8d
2d
1d
Now
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 37% · changed +12 pts in 24h
+12 pts
54%
Yes 54%
No 46%
Leave SFB more than 15 minutes late?
Calm-weather odds: 37% · changed +0 pts in 24h
+0 pts
35%
Yes 35%
No 65%
Arrive at GRR more than an hour late?
Calm-weather odds: 15% · changed −2 pts in 24h
−2 pts
15%
Yes 15%
No 85%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to GRR?
On time or early
46%
15–30 min late
12%
30 min–1 hour late
26%
1–2 hours late
8%
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
↑
Thunderstorms forecast at SFB that day
↑
Later flights pick up delays from earlier in the day
↑
G4's recent on-time record
↓
SFB is quiet at that time
↓
Sundays in October are usually quieter than average
Weather at each end
SFB (origin)
Gusts 11 kt Ceiling 9,000 ft Visibility 7 mi Precip 0.20 in
GRR (destination)
Gusts 21 kt Ceiling 10,000 ft Visibility 10+ mi Precip 0.04 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.