I just do major research on all search engines and airline websites. I
first, use the search engines and then depending on what carriers come up as
cheapest, I then go to their website to see if I can get it cheaper.
travelocity is good because you don't have to put in dates- you can do a
range. delta, usair, and american are the carriers. I usually buy on
travelocity or delta's homepage. if you travel on a tuesday it is usually
cheaper. he came on saturday to the following tuesday.
hope this helps.