Thanks all for your answers. Definitely understand that upgrade offers are not guaranteed. I always fly J in QR at least 4 times a year when me and my wife travel but I bought these tix for my sisters to visit us here in the US. this route btw is IAD - DOH - KHI.

Just fyi on how full J cabins are in this route: my wife and I just traveled IAD - DOH - JNB in qsuites when we went to Botswana on Nov 11 and the iad - doh cabin was only about 75% full. Definately space available for any upgrades if someone wanted from economy.