Schedule: a typical summer Thursday (the flights of Jul 30, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 639
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
G4 639 · AZA → GRI
departs 6:07 PM MT · arrives 10:27 PM CT
Forecast issued Thu 10:00 PM ET · 1h after departure
Watch this flight
Other days
Thu 10/1
Today 40%
Odds over time
Arrive at GRI more than 15 minutes late?
37%
chance · ±2 pts
+0 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
37%
Leave 15+ late
37%
Arrive 1h+ late
13%
Cancelled
1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
2.8d
2d
1d
12h
6h
Departs
Lands
Arrive at GRI more than 15 minutes late?
Calm-weather odds: 37% · changed +0 pts in 24h
+0 pts
37%
Yes 37%
No 63%
Leave AZA more than 15 minutes late?
Calm-weather odds: 39% · changed +3 pts in 24h
+3 pts
37%
Yes 37%
No 63%
Arrive at GRI more than an hour late?
Calm-weather odds: 13% · changed −1 pt in 24h
−1 pt
13%
Yes 13%
No 87%
Cancelled?
Calm-weather odds: 1% · changed +0 pts in 24h
+0 pts
1%
Yes 1%
No 99%
How late will it get to GRI?
On time or early
63%
15–30 min late
15%
30 min–1 hour late
9%
1–2 hours late
9%
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
↑
G4's recent on-time record
↑
Later flights pick up delays from earlier in the day
↑
AZA is prone to delays
↓
Mostly benign weather forecast at AZA
↓
Thursdays in October are usually quieter than average
Weather at each end
AZA (origin)
Gusts 9 kt Ceiling none (clear) Visibility 10+ mi Precip none
GRI (destination)
Gusts 27 kt Ceiling 300 ft Visibility 4 mi Precip 0.08 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.