Freight is calculated at the time of factory order, Due to the many Captive Air Manufacturing Facilities in the United States. Captive Air maintains 5 strategically located manufacturing facilities in the U.S. including, North Carolina, Iowa, Oklahoma, California, and Pennsylvania. This alone gives us the edge on low cost freight. If you buy our product in Arizona, Your freight would only be calculated from California, A huge savings. If the same customer buys from another manufacturer in the north east they would pay freight the whole way across the country. Do the math, Call us for a free quote today.