How long is a flight from logan airport in boston to africa?

In 1941, Delta moved its headquarters from Monroe to Atlanta, Georgia, to center itself along its new route network that now stretched to Chicago, Illinois, Miami, Florida, and New Orleans, Louisiana. On May 1, 1953, Delta merged with Chicago and Southern Air Lines to procure its first international routes from New Orleans to Havana, Cuba and Caracas, Venezuela as well as an increased presence in the Midwest. In 1955 Delta introduced the "hub and spoke system" whereby flights are routed to a central point then sent out to other cities. By the early 1960s, Delta's route network stretched to the West Coast, and Dallas was emerging as its second hub city.