Due to multiple factors, expect to potentially pay more when booking in December. For low rates, February can be a great choice for travel to Johnson City. Flights to Johnson City from London Gatwick Airport in February are about £754 on average during February, but can be found for as low as £479.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from London Gatwick Airport to Johnson City as you normally would.
American Airlines, Finnair and British Airways are the most popular airlines when flying from London Gatwick Airport to Johnson City.