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 1437
SCHEDULED · TYPICAL SCHEDULE
Sunday, October 4 Tomorrow
G4 1437 · MDW → TYS
departs 2:48 PM CT · arrives 5:18 PM ET
Forecast issued Sat 7:00 AM ET · 33h before departure
Watch this flight
Odds over time
Arrive at TYS more than 15 minutes late?
28%
chance · ±3 pts
+0 pts · 24h
HOW SURE WE ARE
Moderate. The odds now blend history with early weather forecasts.
Arrive 15+ late
28%
Leave 15+ late
25%
Arrive 1h+ late
9%
Cancelled
1%
MOSTLY HISTORY
WEATHER FORECASTS
LIVE
IN THE AIR
0%
10%
20%
30%
40%
5.7d
2d
Now
1d
12h
6h
Departs
Lands
Arrive at TYS more than 15 minutes late?
Calm-weather odds: 19% · changed +0 pts in 24h
+0 pts
28%
Yes 28%
No 72%
Leave MDW more than 15 minutes late?
Calm-weather odds: 21% · changed −1 pt in 24h
−1 pt
25%
Yes 25%
No 75%
Arrive at TYS more than an hour late?
Calm-weather odds: 7% · changed +0 pts in 24h
+0 pts
9%
Yes 9%
No 91%
Cancelled?
Calm-weather odds: <1% · changed +0 pts in 24h
+0 pts
1%
Yes 1%
No 99%
How late will it get to TYS?
On time or early
71%
15–30 min late
12%
30 min–1 hour late
8%
1–2 hours late
5%
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
↑
Cloud base down to 200 ft, visibility down to 0.8 mi, 1.0 in of rain forecast at TYS that day
↑
G4's recent on-time record
↑
This flight has been late 27% of the time recently
↓
Mostly benign weather forecast at MDW
↓
TYS usually runs smoothly
Weather at each end
MDW (origin)
Gusts 11 kt Ceiling none (clear) Visibility 10+ mi Precip none
TYS (destination)
Gusts 5 kt Ceiling 200 ft Visibility 0.5 mi Precip 0.99 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.