Schedule: the flights that flew on Monday, Oct 19, re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 121
SCHEDULED · TYPICAL SCHEDULE
Monday, October 26 Yesterday
G4 121 · DSM → LAS
departs 1:48 PM CT · arrives 3:03 PM PT
Forecast issued Mon 11:00 PM ET · 8h after departure
Watch this flight
Odds over time
Arrive at LAS more than 15 minutes late?
13%
chance · ±0 pts
−2 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
13%
Leave 15+ late
19%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.6d
2d
1d
12h
6h
Departs
Lands
Arrive at LAS more than 15 minutes late?
Calm-weather odds: 13% · changed −2 pts in 24h
−2 pts
13%
Yes 13%
No 87%
Leave DSM more than 15 minutes late?
Calm-weather odds: 19% · changed −3 pts in 24h
−3 pts
19%
Yes 19%
No 81%
Arrive at LAS more than an hour late?
Calm-weather odds: 5% · changed +0 pts in 24h
+0 pts
5%
Yes 5%
No 95%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to LAS?
On time or early
87%
15–30 min late
4%
30 min–1 hour late
3%
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
↑
LAS is prone to delays
↑
This flight has been late 24% of the time recently
↑
Arrivals into LAS at that hour are often late
↓
Mostly benign weather forecast at LAS
↓
Mostly benign weather forecast at DSM
Weather at each end
DSM (origin)
Gusts 10 kt Ceiling 11,714 ft Visibility 10+ mi Precip none
LAS (destination)
Gusts 9 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.