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 3491
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Tomorrow
G4 3491 · PHL → GRR
departs 5:38 PM ET · arrives 7:43 PM ET
Forecast issued Sun 7:00 AM ET · 35h before departure
Watch this flight
Other days
Mon 10/5
Fri 10/9 23%
Odds over time
Arrive at GRR more than 15 minutes late?
19%
chance · ±1 pts
−3 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
19%
Leave 15+ late
22%
Arrive 1h+ late
11%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.7d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 18% · changed −3 pts in 24h
−3 pts
19%
Yes 19%
No 81%
Leave PHL more than 15 minutes late?
Calm-weather odds: 19% · changed +0 pts in 24h
+0 pts
22%
Yes 22%
No 78%
Arrive at GRR more than an hour late?
Calm-weather odds: 8% · changed −2 pts in 24h
−2 pts
11%
Yes 11%
No 89%
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
81%
15–30 min late
3%
30 min–1 hour late
5%
1–2 hours late
6%
Over 2 hours late
4%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
5pm departures from PHL are often late
↑
Later flights pick up delays from earlier in the day
↑
G4's recent on-time record
↓
Mondays in October are usually quieter than average
↓
GRR usually runs smoothly
Weather at each end
PHL (origin)
Gusts 20 kt Ceiling 700 ft Visibility 10+ mi Precip none
GRR (destination)
Gusts 15 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.