Scott Keyes has been finding and sharing cheap flight deals since 2013 after he scored a mistake fare that made his friends envious: a scheduling error got him a roundtrip ticket from New York City to Milan for $130. What started as a hobby – and a service for friends and colleagues – has since grown to a business with more than 2 million subscribers and a team 65 people strong.  The name he first gave his newsletter — Scott’s Cheap Flights — now seems misleading and limiting, Keyes told SFGATE this week. The company’s new name, Going, and sleek branding to go with it, went live earlier this month.…