I know this isn't news, but I just had an astounding experience - looking at booking HKG_KUL Booking on Malaysia website HK$1045 rt (about USD 133) SAME flights booked on aa.com USD 1077 (almost 10x the cost if booked on different website)! These were booked as CX (even if flown by Malaysia) so I checked the non code share CX flights on the CX website - HKD 1655. This followed my looking at a fare HKG-BKK on Thai - which on their website was about USD150. Had a "voucher" that could only be booked directly with them, so I called and asked the cost for the same flights .... over USD 800! I asked to make sure it wasn't a mistake - no "there are cheaper fares available online" .... no kidding. As an aside- this makes the voucher I was given totally useless, and yes I had asked for one that I could use electronically- but they denied it was possible. Just a reminder that it really pays (no pun intended) to pay attention to where you are booking.