Schedule: a typical summer Monday (the flights of Jul 27, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 556
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5
G4 556 · JAX → GRR
departs 10:12 AM ET · arrives 12:30 PM ET
Forecast issued Sat 6:00 AM ET · 52h before departure
Watch this flight
Other days
Mon 10/5
Fri 10/9 13%
Odds over time
Arrive at GRR more than 15 minutes late?
13%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
13%
Leave 15+ late
15%
Arrive 1h+ late
6%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
6.4d
Now
1d
12h
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 8% · changed – in 24h
–
13%
Yes 13%
No 87%
Leave JAX more than 15 minutes late?
Calm-weather odds: 10% · changed – in 24h
–
15%
Yes 15%
No 85%
Arrive at GRR more than an hour late?
Calm-weather odds: 5% · changed – in 24h
–
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
1%
Yes 1%
No 99%
How late will it get to GRR?
On time or early
86%
15–30 min late
2%
30 min–1 hour late
5%
1–2 hours late
3%
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
↑
Cloud base down to 200 ft, visibility down to 2 mi, 1.1 in of rain forecast at JAX that day
↑
This flight has been late 21% of the time recently
↑
Other factors
↓
JAX usually runs smoothly
↓
Mondays in October are usually quieter than average
Weather at each end
JAX (origin)
Gusts 9 kt Ceiling 200 ft Visibility 2 mi Precip 1.12 in
GRR (destination)
Gusts 17 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.