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 539
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
G4 539 · EWR → GRR
departs 12:55 PM ET · arrives 2:50 PM ET
Forecast issued Fri 1:00 AM ET · 60h before departure
Watch this flight
Odds over time
Arrive at GRR more than 15 minutes late?
23%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
23%
Leave 15+ late
14%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
5.6d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 13% · changed – in 24h
–
23%
Yes 23%
No 77%
Leave EWR more than 15 minutes late?
Calm-weather odds: 11% · changed – in 24h
–
14%
Yes 14%
No 86%
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
76%
15–30 min late
7%
30 min–1 hour late
10%
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
↑
EWR is prone to delays
↑
G4's recent on-time record
↑
Other factors
↓
GRR usually runs smoothly
↓
Mostly benign weather forecast at GRR
Weather at each end
EWR (origin)
Gusts 16 kt Ceiling 300 ft Visibility 2 mi Precip 0.05 in
GRR (destination)
Gusts 22 kt Ceiling 4,200 ft 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.