Tracked live by the FAA, but its flight plan was first seen after takeoff, so we don't know the scheduled time and can't say whether it's late.

ALLEGIANT · FLIGHT G4 1398 IN THE AIR (OFF 6:08 AM ET, ETA 7:56 AM ET) · SCHEDULED TIME UNKNOWN

Saturday, October 3 Today

G4 1398 · TYS → BOS

took off 6:08 AM ET · expected to land 7:56 AM ET (scheduled time unknown)

Forecast issued Sat 4:00 AM ET · 2h before departure

Arrive at BOS more than 15 minutes late?

13% chance · ±0 pts −20 pts · 24h

HOW SURE WE ARE High. The odds now come mostly from live FAA and airport data.

What’s moving the odds

↑ Thunderstorms forecast at PIE that day

↑ 0.6 in of rain forecast at TYS that day

↑ Other factors

↓ TYS usually runs smoothly

↓ Saturdays in October are usually quieter than average

Weather at each end

TYS (origin) Gusts8 kt Ceiling2,700 ft Visibility4 mi Precip0.50 in

BOS (destination) Gusts13 kt Ceiling5,500 ft Visibility10+ mi Precipnone

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.

G4 1398 · TYS → BOS

Odds over time