I use Orbitz all the time and it is the exact same price as going direct, I still get my mileage credits and they notify me if my flight gets changed (which it just did). Plus, if on the wild chance (notice I used the word chance) that someone books the EXACT SAME itinerary, at a lower price, I get that refund thingy they always talk about on TV. (Hasn't happened yet

) But, that being said, use Orbitz for your search, then go to that airline and see if you can get the same fair.