New York to Nashville in about two hours
Teterboro to Nashville International is 756 miles, about two hours and a quarter in a light jet, two hours in a super-midsize and a little under in a heavy cabin. Westbound flights fly into the prevailing wind; the return is usually ten to fifteen minutes quicker.
Nashville is on Central Time, an hour behind New York. That hour works in your favour on the way out: as an illustration, a departure from Teterboro at 8 lands in Nashville a little after 9 local time, early enough for a morning on Music Row or at a headquarters in Brentwood or Franklin. The actual times depend on the aircraft, the crew's duty limits and the airports on the day, and are confirmed with the quote.
The airline alternative is a commercial flight from LaGuardia or Newark with security and a terminal at each end. A private flight lands at a private terminal with the car on the ramp, and leaves when you do.
Which New York airport to leave from is set out in our guide to the private jet airports in New York: FBOs, customs and curfews, side by side.