Schedule: a typical summer Sunday (the flights of Jul 26, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 439
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4
G4 439 · DSM → AUS
departs 10:57 AM CT · arrives 1:06 PM CT
Forecast issued Fri 4:00 PM ET · 44h before departure
Watch this flight
Odds over time
Arrive at AUS more than 15 minutes late?
21%
chance · ±2 pts
−7 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
21%
Leave 15+ late
18%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.6d
Now
1d
12h
6h
Departs
Lands
Arrive at AUS more than 15 minutes late?
Calm-weather odds: 14% · changed −7 pts in 24h
−7 pts
21%
Yes 21%
No 79%
Leave DSM more than 15 minutes late?
Calm-weather odds: 18% · changed −4 pts in 24h
−4 pts
18%
Yes 18%
No 82%
Arrive at AUS more than an hour late?
Calm-weather odds: 5% · changed −1 pt in 24h
−1 pt
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to AUS?
On time or early
79%
15–30 min late
4%
30 min–1 hour late
11%
1–2 hours late
2%
Over 2 hours late
3%
Cancelled
<1%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
Gusts to 25 kt, cloud base down to 1,100 ft forecast at AUS that day
↑
Other factors
↑
This flight has been late 17% of the time recently
↓
Mostly benign weather forecast at DSM
↓
Early flights usually leave on time
Weather at each end
DSM (origin)
Gusts 13 kt Ceiling none (clear) Visibility 10+ mi Precip none
AUS (destination)
Gusts 24 kt Ceiling 1,100 ft Visibility 10+ mi Precip 0.02 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.