NW doesn't fly to where I go, but they offer an elite benefit that is underrecognized. They allow elites to upgrade on domestic coach award tickets at the usual upgrade windows. Also, right now as in q1 2004, UA is offering a number of combinable promotions which is refreshing in an industry that loves to give us only 1 promotion at a time. With UA currently, on a single purchassed ticket, you can qualify for:
*Fly 2 RT nonstop BOS-NYC/California get 1 systemwide tkt free;
*Fly 3 get 1 coach, fly 6 get coach+first class domestic tkt;
*Spend $1000 and fly by 3/31 online, and get a north America one-way upgrade;
*Buy a roundtrip online, and get a free companion ticket.
The biggest restrictions on this are that on quallifying activity you cannot have a Sat night stay.