Beware that nesting tickets to circumvent minimum stay requirements is almost certainly against fare rules. For example, http://www.aa.com/i18nForward.do?p=/cu

Beware that nesting tickets to circumvent minimum stay requirements is almost certainly against fare rules. For example, http://www.aa.com/i18nForward.do?p=/customerService/customerCommitment/conditionsOfCarriage.jsp&v_locale=en_US&v_mobileUAFlag=AA#TicketCompliance http://www.aa.com/i18nForward.do?p=/customerService/customer... American specifically prohibits the practices commonly known as: Back to Back Ticketing: The combination of two or more roundtrip excursion fares end to end for the purpose of circumventing minimum stay requirements. And yes, there are automated algorithms to detect that (although both tickets would need to be on the same airline for those algorithms to work, and the fact that MHT/BOS/PVD are different airports may be enough to get around that in your case)