While I can see that e.g. American Airlines specifically prohibit it in their conditions of carriage here (where they call it "Back to Back Ticketing":
http://www.aa.com/i18n/customerServi...OfCarriage.jsp
I can see no such clause in BA's conditions of carriage here:
http://www.britishairways.com/en-gb/...ns-of-carriage
Last edited by Cerebrito; Jan 20, 2015 at 7:21 am
Reason: Clarify that AA call nesting "Back to Back Ticketing"