Originally Posted by gba

AS doesn't put its code on other airlines trans-oceanic flights. You won't find an Alaska-coded flight or fare to SYD, although Qantas does put its code on Alaska flights (and publish fares to SEA with travel on AS for SEA-LAX). I think this is per IATA guidelines, perhaps someone who knows more about how ticketing agreements work can provide more info.

KA will now put its code on (and publish fares to) more AS destinations. While for most AS flyers there will be little impact, I think its generally a positive thing to see AS expanding its relationships with partner airlines.