Also, if you are looking for premium cabins, you may have to be a little flexible on flying in before the start and leaving after the end, as the national team (of your country and/or other countries) might be on those flights. I flew out of Beijing the night of the closing ceremony on UA and all that was available to for non-olympic athletes/coaches/support/VIP/etc was the middle section of one row of economy plus and the rest of economy (and NO premium space)