Instead of a public forum a travel agent would give you better info.

Anyway, looking in

http://www.expedia.com

I found that tickets range from 431 US$ up to 2039 US$. (1600 to 7500 QAR)

Being the cheapest ETIHAD, and being the most expensive Kingfisher Airlines.

Yet you must get a proper quotation from a travel agent since fares could change.

Regards!!