Whitedog: I don't know UA award you are after, but have you looked to see if AA/oneworld offers a similar award/destination? Your USAir miles could become AA miles - 1 to 1 - if you are redeeming an eligible award.

The arrangement between US and AA ends in August. Rumor has it that UA and US will eventually form some sort of FF partnership, even if the merger doesn't get through.