Schedule: a typical Wednesday (the flights of Jul 29, 2026, re-dated). Real flights replace these once the FAA publishes them, usually about a day ahead.
ALLEGIANT · FLIGHT G4 569
SCHEDULED · TYPICAL SCHEDULE
Wednesday, September 30 Today
G4 569 · SFB → GRR
departs 6:19 PM ET · arrives 8:52 PM ET
Forecast issued Wed 4:00 AM ET · 14h before departure
Watch this flight
Odds over time
Arrive at GRR more than 15 minutes late?
33%
chance · ±2 pts
+2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
33%
Leave 15+ late
35%
Arrive 1h+ late
15%
Cancelled
3%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.8d
2d
1d
Now
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 17% · changed +2 pts in 24h
+2 pts
33%
Yes 33%
No 67%
Leave SFB more than 15 minutes late?
Calm-weather odds: 26% · changed +0 pts in 24h
+0 pts
35%
Yes 35%
No 65%
Arrive at GRR more than an hour late?
Calm-weather odds: 9% · changed +5 pts in 24h
+5 pts
15%
Yes 15%
No 85%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
3%
Yes 3%
No 97%
How late will it get to GRR?
On time or early
65%
15–30 min late
6%
30 min–1 hour late
12%
1–2 hours late
10%
Over 2 hours late
4%
Cancelled
3%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 500 ft forecast at GRR that day
↑
Later flights pick up delays from earlier in the day
↑
6pm departures from SFB are often late
↓
Wednesdays in September are usually quieter than average
↓
GRR usually runs smoothly
Weather at each end
SFB (origin)
Gusts 11 kt Ceiling 9,000 ft Visibility 10+ mi Precip 0.11 in
GRR (destination)
Gusts 20 kt Ceiling 500 ft Visibility 3 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.