Schedule: a typical summer Saturday (the flights of Jul 25, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 1239
SCHEDULED · TYPICAL SCHEDULE
Saturday, October 3 Yesterday
G4 1239 · MYR → MDT
departs 5:35 PM ET · arrives 7:09 PM ET
Forecast issued Sat 10:00 PM ET · 4h after departure
Watch this flight
Odds over time
Arrive at MDT more than 15 minutes late?
33%
chance · ±0 pts
−1 pt · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
33%
Leave 15+ late
27%
Arrive 1h+ late
10%
Cancelled
2%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
4.8d
2d
1d
12h
6h
Departs
Lands
Arrive at MDT more than 15 minutes late?
Calm-weather odds: 34% · changed −1 pt in 24h
−1 pt
33%
Yes 33%
No 67%
Leave MYR more than 15 minutes late?
Calm-weather odds: 27% · changed +1 pt in 24h
+1 pt
27%
Yes 27%
No 73%
Arrive at MDT more than an hour late?
Calm-weather odds: 10% · changed +0 pts in 24h
+0 pts
10%
Yes 10%
No 90%
Cancelled?
Calm-weather odds: 2% · changed +0 pts in 24h
+0 pts
2%
Yes 2%
No 98%
How late will it get to MDT?
On time or early
66%
15–30 min late
7%
30 min–1 hour late
16%
1–2 hours late
6%
Over 2 hours late
3%
Cancelled
2%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Cloud base down to 1,100 ft forecast at MYR that day
↑
G4's recent on-time record
↑
This flight has been late 24% of the time recently
↓
Mostly benign weather forecast at MDT
↓
MYR usually runs smoothly
Weather at each end
MYR (origin)
Gusts 12 kt Ceiling 700 ft Visibility 10+ mi Precip 0.04 in
MDT (destination)
Gusts 15 kt Ceiling 4,500 ft Visibility 10+ mi Precip 0.01 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.