I have been watching the United site and Expedia for plane tickets. Yesterday I noticed a $29 per ticket difference for seemingly the same flights on United. So, my question is what I might have to give up if I were to buy my ticket on Expedia. Do I get my ff miles and credit towards my ff status? Does my ticket bought on Expedia still allow me to take advantage of my silver level privileges, such as sitting in economy plus? (I know I can't select a seat there until 24 hours before flight time.) The flights are still a few months off so I'm not sure why there might be discounts on Expedia at this point.