I am wondering if I am doing something very wrong, or is this common knowledge. I found that ticket prices on cathaypacific.com are much cheaper than those on OTAs.

I did a few searches for long hauls from HK, to places where CX has direct flights, including ORD, DUS, LAX, and ZRH. The prices on cathaypacific.com are all around USD$900-1200. But if I run these searches on OTAs (I have tried ITA, orbitz, and HK and US expedia), the exact same flights very often cost 50% more, and sometimes more than double. Since I have tried both HK and US version of expedia I don't think it's a sale city issue.

Any clue on why this is happening?