Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Glasgow to Johnson City as you normally would.
Consider American Airlines, Air France or Finnair when booking your flight. These represent the most popular airlines when flying from Glasgow to Johnson City.
Looking at all options, your cheapest flight can be booked for £627. While the most popular route (Glasgow Intl - Blountville Tri Cities TN/VA) can be booked for £1,907 on average our data indicates £657 when flying from Glasgow to Johnson City.