Thanks Landspeed. Actually, the issue is a little different than directly exchanging Hilton points for airline miles. My question surrounds the issue of exchanging points for airline tickets, which Hilton also does with a variety of airlines, and in particular, if the exchange gives a ticket/voucher or a deposit of miles (or in the case of Southwest, credits). I figured it would be a ticket/voucher, but the Southwest discussion I saw seems to indicate it is a deposit of credits.