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 251
SCHEDULED · TYPICAL SCHEDULE
Monday, October 5 Tomorrow
G4 251 · AUS → IAD
departs 3:52 PM CT · arrives 8:13 PM ET
Forecast issued Sun 11:00 AM ET · 30h before departure
Watch this flight
Odds over time
Arrive at IAD more than 15 minutes late?
30%
chance · ±2 pts
+2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
30%
Leave 15+ late
28%
Arrive 1h+ late
12%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
6.7d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at IAD more than 15 minutes late?
Calm-weather odds: 24% · changed +2 pts in 24h
+2 pts
30%
Yes 30%
No 70%
Leave AUS more than 15 minutes late?
Calm-weather odds: 26% · changed +0 pts in 24h
+0 pts
28%
Yes 28%
No 72%
Arrive at IAD more than an hour late?
Calm-weather odds: 9% · changed −1 pt in 24h
−1 pt
12%
Yes 12%
No 88%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
<1%
Yes <1%
No 99%
How late will it get to IAD?
On time or early
70%
15–30 min late
13%
30 min–1 hour late
4%
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
↑
This flight has been late 33% of the time recently
↑
G4's recent on-time record
↑
3pm departures from AUS are often late
↓
Mondays in October are usually quieter than average
↓
Mostly benign weather forecast at AUS
Weather at each end
AUS (origin)
Gusts 21 kt Ceiling 4,167 ft Visibility 10+ mi Precip none
IAD (destination)
Gusts 20 kt Ceiling 300 ft Visibility 5 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.