AirStream Jets uses a mileage-based formula to calculate flight costs eschewing the traditional hours metric. Through September 3rd it is offering a $500 off its $25,000 Silver Distance Card and $4,000 off its $100,000 Gold Distance Card. To figure out how much your trip will cost, you refer to a simple chart (below) based on the mileage of your flight and then the size of jet you want. For example, a trip of 1,000 miles on a light jet holding up to six passengers costs $12 per mile so your flight would cost $12,000. You pay the 7.5% FET additionally to the card amount when you buy the card so the flight prices exclude the tax.