Schedule: a typical summer Friday (the flights of Jul 31, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 1278
SCHEDULED · TYPICAL SCHEDULE
Friday, October 2 Today
G4 1278 · ROA → SFB
departs 4:40 PM ET · arrives 6:26 PM ET
Forecast issued Fri 1:00 PM ET · 4h before departure
Watch this flight
Odds over time
Arrive at SFB more than 15 minutes late?
43%
chance · ±0 pts
−4 pts · 24h
HOW SURE WE ARE
High. The odds now come mostly from live FAA and airport data.
Arrive 15+ late
43%
Leave 15+ late
60%
Arrive 1h+ late
29%
Cancelled
27%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
20%
40%
60%
80%
3.8d
2d
1d
12h
6h
Now
Departs
Lands
Arrive at SFB more than 15 minutes late?
Calm-weather odds: 58% · changed −4 pts in 24h
−4 pts
43%
Yes 43%
No 57%
Leave ROA more than 15 minutes late?
Calm-weather odds: 52% · changed +15 pts in 24h
+15 pts
60%
Yes 60%
No 40%
Arrive at SFB more than an hour late?
Calm-weather odds: 16% · changed +6 pts in 24h
+6 pts
29%
Yes 29%
No 71%
Cancelled?
Calm-weather odds: 3% · changed +26 pts in 24h
+26 pts
27%
Yes 27%
No 73%
How late will it get to SFB?
On time or early
42%
15–30 min late
7%
30 min–1 hour late
3%
1–2 hours late
14%
Over 2 hours late
7%
Cancelled
27%
Gate arrival compared with the scheduled arrival. The ranges add up to 100%.
What’s moving the odds
↑
This flight has been late 32% of the time recently
↑
Thunderstorms forecast at SFB that day
↑
Arrivals into SFB at that hour are often late
↓
ROA is quiet at that time
↓
Mostly benign weather forecast at ROA
Weather at each end
ROA (origin)
Gusts 13 kt Ceiling 9,000 ft Visibility 10+ mi Precip none
SFB (destination)
Gusts 25 kt Ceiling 2,300 ft Visibility 6 mi Precip 0.60 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.