Just to be more clear about GSP, GSO, and CAE mileage runs using E-Savers, I'm referring of course to the ones where you have to make a connection, which you can't usually do on CLT E-Savers (except some international ones). For instance, I did a CAE-IAH mileage run earlier this year, which worked out better than the same CLT-IAH mileage run available the same week because of the 2 500-mile segments from CAE-CLT, and cost the same (maybe $10 more, but no more than that).