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 1638
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Today
G4 1638 · PHX → SCK
departs 6:47 PM MT · arrives 8:29 PM PT
Forecast issued Mon 9:00 AM ET · 13h before departure
Watch this flight
Other days
Today
Fri 10/9 39%
Odds over time
Arrive at SCK more than 15 minutes late?
40%
chance · ±0 pts
+7 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
40%
Leave 15+ late
33%
Arrive 1h+ late
12%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
6.9d
2d
1d
Now
6h
Departs
Lands
Arrive at SCK more than 15 minutes late?
Calm-weather odds: 30% · changed +7 pts in 24h
+7 pts
40%
Yes 40%
No 60%
Leave PHX more than 15 minutes late?
Calm-weather odds: 30% · changed −2 pts in 24h
−2 pts
33%
Yes 33%
No 67%
Arrive at SCK more than an hour late?
Calm-weather odds: 16% · changed −4 pts in 24h
−4 pts
12%
Yes 12%
No 88%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to SCK?
On time or early
60%
15–30 min late
15%
30 min–1 hour late
13%
1–2 hours late
8%
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
↑
6pm departures from PHX are often late
↑
G4's recent on-time record
↑
Later flights pick up delays from earlier in the day
↓
Mondays in October are usually quieter than average
↓
Mostly benign weather forecast at SCK
Weather at each end
PHX (origin)
Gusts 22 kt Ceiling none (clear) Visibility 10+ mi Precip none
SCK (destination)
Gusts 12 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.