 At which airport is this airline headquartered, which provide Rutland–Southern Vermont Regional Airport with commercial service?
Rutland–Southern Vermont Regional Airport:  Scheduled commercial service is subsidized by the Essential Air Service and provided by Cape Air, with three flights daily on nine-passenger Cessna 402 aircraft to Boston with typical flight times of 40 minutes. Cape Air: Hyannis Air Service, Inc., operating as Cape Air, is an airline headquartered at Barnstable Municipal Airport in Barnstable, Massachusetts, United States.
Barnstable Municipal Airport