Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 3491
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2
G4 3491 · PHL → GRR
departs 5:38 PM ET · arrives 7:43 PM ET
Forecast issued Fri 10:00 PM ET · 4h after departure
Watch this flight
Other days
Fri 10/2
Mon 10/5 23%
Fri 10/9 23%
Odds over time
Arrive at GRR more than 15 minutes late?
53%
chance · ±0 pts
+1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
53%
Leave 15+ late
35%
Arrive 1h+ late
27%
Cancelled
3%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
3.8d
2d
1d
12h
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 53% · changed +1 pt in 24h
+1 pt
53%
Yes 53%
No 47%
Leave PHL more than 15 minutes late?
Calm-weather odds: 35% · changed +0 pts in 24h
+0 pts
35%
Yes 35%
No 65%
Arrive at GRR more than an hour late?
Calm-weather odds: 27% · changed +0 pts in 24h
+0 pts
27%
Yes 27%
No 73%
Cancelled?
Calm-weather odds: 3% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
How late will it get to GRR?
On time or early
46%
15–30 min late
10%
30 min–1 hour late
15%
1–2 hours late
14%
Over 2 hours late
13%
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Mostly benign weather forecast at PHL
↑
5pm departures from PHL are often late
↑
Later flights pick up delays from earlier in the day
↓
GRR usually runs smoothly
↓
Fridays in October are usually quieter than average
Weather at each end
PHL (origin)
Gusts 27 kt Ceiling 3,000 ft Visibility 2 mi Precip 0.36 in
GRR (destination)
Gusts 18 kt Ceiling 900 ft Visibility 7 mi Precip 0.24 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.