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 1237
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Tomorrow
G4 1237 · SFB → LEX
departs 6:00 AM ET · arrives 7:55 AM ET
Forecast issued Fri 11:00 PM ET · 31h before departure
Watch this flight
Other days
Today 28%
Sun 10/4
Odds over time
Arrive at LEX more than 15 minutes late?
9%
chance · ±1 pts
−2 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
9%
Leave 15+ late
9%
Arrive 1h+ late
5%
Cancelled
<1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
5%
10%
15%
20%
5.3d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at LEX more than 15 minutes late?
Calm-weather odds: 11% · changed −2 pts in 24h
−2 pts
9%
Yes 9%
No 91%
Leave SFB more than 15 minutes late?
Calm-weather odds: 7% · changed −1 pt in 24h
−1 pt
9%
Yes 9%
No 91%
Arrive at LEX more than an hour late?
Calm-weather odds: 5% · changed −1 pt in 24h
−1 pt
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 LEX?
On time or early
90%
15–30 min late
4%
30 min–1 hour late
<1%
1–2 hours late
3%
Over 2 hours late
2%
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
↑
This flight has been late 23% of the time recently
↑
Other factors
↓
Early flights usually leave on time
↓
6am departures from SFB are usually not late
Weather at each end
SFB (origin)
Gusts 12 kt Ceiling 10,000 ft Visibility 10+ mi Precip 0.14 in
LEX (destination)
Gusts 7 kt Ceiling 1,100 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.