Schedule: a typical summer Thursday (the flights of Jul 30, 2026), re-dated. Real flights replace these once airlines file their FAA flight plans, usually about a day ahead.
ALLEGIANT · FLIGHT G4 1421
SCHEDULED · TYPICAL SCHEDULE
Thursday, October 1
G4 1421 · DEN → TYS
departs 9:01 AM MT · arrives 1:51 PM ET
Forecast issued Thu 10:00 PM ET · 11h after departure
Watch this flight
Odds over time
Arrive at TYS more than 15 minutes late?
14%
chance · ±0 pts
−23 pts · 24h
HOW SURE WE ARE
Very high. The odds now come almost entirely from live conditions.
Arrive 15+ late
14%
Leave 15+ late
17%
Arrive 1h+ late
4%
Cancelled
<1%
WEATHER FORECASTS
LIVE
IN THE AIR
0%
15%
30%
45%
60%
2.9d
2d
1d
12h
6h
Departs
Lands
Arrive at TYS more than 15 minutes late?
Calm-weather odds: 14% · changed −23 pts in 24h
−23 pts
14%
Yes 14%
No 86%
Leave DEN more than 15 minutes late?
Calm-weather odds: 16% · changed −25 pts in 24h
−25 pts
17%
Yes 17%
No 83%
Arrive at TYS more than an hour late?
Calm-weather odds: 4% · changed −6 pts in 24h
−6 pts
4%
Yes 4%
No 96%
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
85%
15–30 min late
4%
30 min–1 hour late
6%
1–2 hours late
2%
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
↑
DEN is busy at that time
↑
Other factors
↓
Mostly benign weather forecast at DEN
↓
Early flights usually leave on time
Weather at each end
DEN (origin)
Gusts 21 kt Ceiling 7,000 ft Visibility 10+ mi Precip none
TYS (destination)
Gusts 14 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.