DFW-ANC and ORD-ANC service is seasonal (for the summer cruise ship tours) and starts June 10, ending mid-September. The AA codeshare on AS is not valid for OWE tickets. ANC is a great place to visit, very spectacular scenery and well worth the trip; also the very best D status run as it books into F so gets 150 SC instead of 100 (making it 50% more than LHR-DXB in D). SFO-BOS also falls into that category. For maximizing QF status credits your best routing is LHR-SFO-BOS-SJU-DFW-ANC-ORD-HNL-SYD giving 720 SC for the US portion (excluding LHR-SFO and HNL-SYD).