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 456
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Today
G4 456 · BOS → DSM
departs 12:06 PM ET · arrives 2:16 PM CT
Forecast issued Sun 6:00 AM ET · 6h before departure
Watch this flight
Odds over time
Arrive at DSM more than 15 minutes late?
19%
chance · ±0 pts
−2 pts · 24h
HOW SURE WE ARE
Good. The odds now lean mostly on firmed-up weather forecasts.
Arrive 15+ late
19%
Leave 15+ late
20%
Arrive 1h+ late
6%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.6d
2d
1d
12h
Now
Departs
Lands
Arrive at DSM more than 15 minutes late?
Calm-weather odds: 19% · changed −2 pts in 24h
−2 pts
19%
Yes 19%
No 81%
Leave BOS more than 15 minutes late?
Calm-weather odds: 18% · changed +1 pt in 24h
+1 pt
20%
Yes 20%
No 80%
Arrive at DSM more than an hour late?
Calm-weather odds: 7% · changed −3 pts in 24h
−3 pts
6%
Yes 6%
No 94%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 100%
How late will it get to DSM?
On time or early
81%
15–30 min late
0%
30 min–1 hour late
13%
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
↑
G4's recent on-time record
↑
12pm departures from BOS are often late
↑
This flight has been late 24% of the time recently
↓
Early flights usually leave on time
↓
Mostly benign weather forecast at DSM
Weather at each end
BOS (origin)
Gusts 15 kt Ceiling 1,100 ft Visibility 6 mi Precip 0.13 in
DSM (destination)
Gusts 11 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.