Thread: Question re:nonrev upgrade to 1st international flights

My husband and I fly lots of nonrev domestic flights, and I know how those upgrades work.But if I choose an international flight with open first class seats, are chances for me getting those seats higher, i.e.,on domestic flights it's easy for revenue people to upgrade with miles, etc., but I heard there are limitations to revenue people getting upgrades for intntl flights...so does that make my nonrev chance better?(DL)