Data points: I know for sure that the 11:42am from SFO-ORD, as well as the the regular 7:20pm ORD-SFO swapped from the 77A to the 77W on both June 13 (Tu) and June 18 (Su). That said, they were not swapped this past Sunday, and for tomorrow these flights are still listed as aboard the 77A Hawaii version.