Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)

Travel to ANC works the same as travel to all other destinations: AAnytime awards are only available on AA metal. If part of your trip is on partner metal (such as AS), then in order to book the trip as one award, there must be SAAver availability on the AA portion as well as the AS portion. If there is not, then your option is to book the AA portion as an AAnytime award, and the AS portion as a SAAver award.

If AA is going to continue to offer seasonal DFW-ANC service, you might wait until those flights are loaded into AA's schedule, so that you can then redeem for ORD-DFW-ANC as a single, AAnytime award.