Have been trying to find "Perksaver" award trip to Osaka for end of July/beginning of August from anywhere in Wisconsin or ORD. There seems to be plenty of availability on the outbound trip, but nothing on the return! August must be a busy month for Japanese tourists in the US??

I've tried several city combinations, and have even looked at other places in Japan (ie to Tokyo or Nagoya), but still nothing. Also, I've checked with Delta and Continental, but nothing there either. Any suggestions about other places to look for availability? Or other airports to try?