Look for cheaper tickets from some other airport, such as other airlines' hubs. This requires giving yourself lots of "connecting" time since you'll have separate tickets and possibly separate bag check fees. You could easily do an overnight somewhere and still save money on some fares. DUB especially have been very cheap recently on some routes. Go to the MR and MR discussion fora for ideas on coach fares an the newish premium fare deals subforum as well as the discussion forum for business class. Often DL matches fares from competitors' hubs.