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 1377
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Tomorrow
G4 1377 · SRQ → GRR
departs 4:51 PM ET · arrives 7:32 PM ET
Forecast issued Sun 4:00 PM ET · 25h before departure
Watch this flight
Odds over time
Arrive at GRR more than 15 minutes late?
30%
chance · ±3 pts
+7 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
30%
Leave 15+ late
20%
Arrive 1h+ late
11%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.7d
2d
Now
12h
6h
Departs
Lands
Arrive at GRR more than 15 minutes late?
Calm-weather odds: 18% · changed +7 pts in 24h
+7 pts
30%
Yes 30%
No 70%
Leave SRQ more than 15 minutes late?
Calm-weather odds: 17% · changed +6 pts in 24h
+6 pts
20%
Yes 20%
No 80%
Arrive at GRR more than an hour late?
Calm-weather odds: 8% · changed +1 pt in 24h
+1 pt
11%
Yes 11%
No 89%
Cancelled?
Calm-weather odds: <1% · changed −1 pt in 24h
−1 pt
1%
Yes 1%
No 99%
How late will it get to GRR?
On time or early
70%
15–30 min late
7%
30 min–1 hour late
12%
1–2 hours late
5%
Over 2 hours late
6%
Cancelled
1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Mostly benign weather forecast at SRQ
↑
Later flights pick up delays from earlier in the day
↑
G4's recent on-time record
↓
Mondays in October are usually quieter than average
↓
Mostly benign weather forecast at GRR
Weather at each end
SRQ (origin)
Gusts 10 kt Ceiling 7,000 ft Visibility 10+ mi Precip 0.08 in
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.