Originally Posted by
MtRoot
ANA tool is more accurate than united.com when it comes to LH F availability. As smichelm said, however, LH doesn't release F award until ~2 weeks before departure. The good news is that this is pretty consistent. So I'd suggest to book decent flights available right now and look for LH F later (no change fee for 1K/Plat).
If you don't mind connecting in Canada, AC out of YYZ or YVR may be an option. Their biz product is quite good too.
BTW Aeroplan will also show star alliance inventory but again it is not as accurate as ANA