From what I have seen AS is very stingy with F saver award space.. My awards in March are saver level on partners, J on AF and in F on BA. The connecting flights in Europe on AF and BA are all in saver J but my connecting flights in the USA are all in saver Y on AS and VX. Using expertflyer I see that almost all of my AS flights have 7 upgrades to F available, which means F is almost empty, and yet no F saver awards seats. I land in LAS late on the 19th so would ideally would like the 10am LAS-PDX flight but it has no saver awards in F or Y available..