Thanks. Yes, I only care about the TPAC flight itself. Almost all of the flights I'm seeing price out near the lowest price involve the same specific flight. I need to go to TPE, from ATL. CHA seems to be several hundred dollars cheaper in Y during my time window, so I am planning to fly from there. Just about all of the <$800 fares have ATL<->ICN as the TPAC segment. I do not care about CHA-ATL upgrade (if it even exists) or ICN-TPE, which probably isn't even eligible on the cheap fares (I've not checked the T&C for how they apply to that segment).