Hi,
As the OP is based in London,
The UK AA site
http://www.americanairlines.co.uk/i1...ryId=undefined
is advertising sale fares ( in economy).
However, if the OP is willing to start their journey from the EU ( ie AMS or BRU) they can get some very nice fares on BA/AA ie for around Easter time ( mid April ) I was getting
BRU-HNL £1400
BRU-LAS/LAX £1250
in business with different routings available on BA/AA.
Flights ex-AMS were around £100 more expensive.
I would check the fare rules for change/cancellation penalties.
There is a thread on the BA forum about maximising BA tier points
http://www.flyertalk.com/forum/briti...er-thread.html
Regards
TBS