Im new in this forum, so Im sorry if im posting in the wrong section.

Im not a very frequent flyer, but I will be. I travel usually around Spain, so I have a Iberia Plus card. Now, Im going to work in Singapore, and will travel sometimes around Asia.

I think that as Iberia is a member of OneWorld alliance, best chance is to travel with companies of the alliance (I think that if I fly in Brittish Airways, as example, I can earn points as it were an Iberia flight). My question is that I have seen VEEEEEEEEEEEEEEEEERY BIG differences in the prices I can get from Iberia or BA sites from the prices I find in orbitz.com trabber.com or so on.....

So, any advice?

Thanks!