I have not have time to check out the figures, but thanks for the link. However, remember guys, revenue means nothing, profit means everything. Of course DL/ATL is going to have the highest revenue, it is the largest hub operation in the US! And if I am not mistaken, #2 in revenue, AA/DFW, is the 2nd largest hub operation in the US! And, someone correct me if I am wrong, but is UA's ORD hub (#4 in revenue) not the third largest hub operation in the US? Of course, CO's EWR hub as #3 makes perfect sense, yields at Newark are sensational. None the less, revenue figures do not determine just how profitable these operations are. That is not to say that Delta's Atlanta hub is not profitable, but using revenue figures is not an accurate way of comparing just how much money these hubs makes in the end of it all.
UA making more revenue than Delta out of JFK does not surprise me. UA has the Heathrow and Tokyo routes and more trans-cons. Those are huge moneymakers for them.