United Airlines Polaris business class is one of the most highly-regarded premium products in the United States. Launched in 2016, the product is now available on all United widebodies operating international flights, following the most recent retrofits of the Boeing 767s. The longest flight in Uniteds network this month is from its hub at San Francisco International Airport (SFO) to Singapore Changi Airport (SIN) at 8,440 miles and is one of several routes to five continents that feature the Polaris product, as well as some transcontinental domestic routes and others to Hawaii.