Schedule: the flights that flew on Thursday, Oct 22, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 581
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 29
G4 581 · BOS → GRR
departs 11:32 AM ET · arrives 1:50 PM ET
Forecast issued Tue 2:00 AM ET · 58h before departure
Watch this flight
Odds over time
Arrive at GRR more than 15 minutes late?
16%
chance · ±1 pts
– · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
16%
Leave 15+ late
14%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.5d
Now
2d
1d
12h
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 13% · changed – in 24h
–
16%
Yes 16%
No 84%
Leave BOS more than 15 minutes late?
Calm-weather odds: 12% · changed – in 24h
–
14%
Yes 14%
No 86%
Arrive at GRR more than an hour late?
Calm-weather odds: 4% · changed – in 24h
–
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed – in 24h
–
<1%
Yes <1%
No 99%
How late will it get to GRR?
On time or early
83%
15–30 min late
8%
30 min–1 hour late
3%
1–2 hours late
3%
Over 2 hours late
2%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
G4's recent on-time record
↑
Mostly benign weather forecast at GRR
↑
11am departures from BOS are often late
↓
Mostly benign weather forecast at BOS
↓
GRR usually runs smoothly
Weather at each end
BOS (origin)
Gusts 19 kt Ceiling none (clear) Visibility 10+ mi Precip none
GRR (destination)
Gusts 22 kt Ceiling 2,300 ft Visibility 10+ mi Precip 0.02 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.