I will, at some point, do a full post about seeing full OneWorld availability using websites other than BA’s.
For a moment, though, take a look at a couple of screenshots that I did whilst researching yesterday’s article on redeeming Avios points via Iberia Plus. These show London to Bangkok redemptions, first screen is 28 May 2013 outbound, second screen is 11 June 2013 inbound (click to enlarge)
As you can see, there are some substantial benefits here over the ba.com booking screen:
1. Iberia shows availability across all classes at the same time – no need (unlike BA) to do separate searches for First and Club World
2. Because of 1., you can mix and match classes with no problem
3. You see a number of decent OneWorld alternatives, involving Finnair, Cathay and a BA / Cathay mix (via Delhi, interestingly!). And, again, you can mix and match classes on each leg at the click of a mouse.
What you CANNOT do with the Iberia website tool, unlike ba.com, is see a month-by-month view of when seats are available. However, if you are tied down to specific dates, the Iberia website is easier to use than BA’s.
Please note that I am NOT recommending booking such redemptions on the Iberia website because their cancellation policies on OneWorld awards, including BA, are far stricter than BA. However, you can use the Iberia site to see what is available for Avios redemption and then either try to force the same result on ba.com or call BAEC.
At some point I will do a fuller post exploring the same functionality across Qantas and other OneWorld partners.