I have also had experiences where Orbitz listed a lower fare than the airline itself. Once was on Aloha, for a one-way ticket HNL
. Another was United, MRY
; in that case United had the same fare but for the flights I wanted was showing a higher price. My roommate also had a case where Expedia was cheaper than American's web site.
I have found Orbitz's flexible date search to be helpful, especially during peak travel periods where availability varies greatly from one day to the next.
However, I have seen that feature, along with the "nearby airports" and hotel search don't always show the best price at first; when I narrow things down (for example, select a specific hotel star rating and distance) sometimes a lower price will show up than was showing before.
David / MRY