Originally Posted by
DLNYC
Try Kayak.
I tried it when I first learned about it and hated the UI. I tried it again just now (on the hope that something might have changed) and didn't get the impression that anything was different. I also poked around a little in an attempt to locate fare basis codes (e.g., "Q", "Y", "F") without any luck. Of course, my motivation wasn't strong so I may have given up too easily...