There are several kinds of business administration degrees available through online U.S. colleges and universities. The most basic-level business administration degree programs offered in U.S. educational institutions range from two-year long associate’s degree programs to more specialized short duration diploma courses in the subject. Higher-level degrees such as a bachelor’s or a master’s in business management provide prospective students with extensive knowledge of the business field. These degrees usually take on average two to four years of full-time education to complete.