Originally Posted by
ethernal
OP said round-trip. Assuming OP's numbers are exact and the "upfare" from the 120K Y ticket, it sounds like one leg is CSY3200 and the other must be one rung lower (2950 if it exists).
The thread title says "500,000 miles one way biz class", so I was assuming the 490K price is one way, but could be wrong. More details needed. The 120K Y ticket was from a few years ago.