New York to Pittsburgh in an hour
Teterboro to Allegheny County Airport is 310 miles, about an hour in a light jet and a few minutes less in anything larger. Pittsburgh International, west of the city, is 324 miles from Teterboro and adds a few minutes in the air and in the car.
The flight is short enough for a day trip: a board meeting, a site visit, a hospital consultation, a Steelers game. As an illustration, a departure from Teterboro at 8 lands at Allegheny County a little after 9, and the aircraft can wait on the ramp to fly you home in the evening; 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 hop from LaGuardia or Newark with security and a terminal at each end, or six hours on the road. A private flight takes the whole day back.
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.