Originally Posted by
vanillabean
At some point on a one-way trip on Alaska miles I will be on an international American flight connecting to a domestic Alaska flight. Does an SDC of the latter allow you to choose an American flight?
AFAIK, AS app only allows SDC of AS-operated flights.
Separately, AA allows certain SDCs, regardless of where you booked the ticket. Rules and restrictions apply.
https://www.aa.com/i18n/plan-travel/...day-travel.jsp