One U.S. air carrier that flew propeller-driven combi aircraft was Northwest Airlines. In 1963, Northwest was operating a domestic and international routing with a Douglas DC-7C four engine propeller aircraft between New York Idlewild Airport (which would subsequently be renamed JFK Airport) and Tokyo that was configured to transport a mixed passenger/cargo load. The round trip routing for this flight which was operated once a week was New York-Chicago-Seattle-Anchorage-Tokyo. The DC-7C was configured with all economy seating in the passenger cabin.[1] By 1966, Northwest was operating jet combi service with Boeing 707-320C aircraft between the U.S. and Asia.