This is a hard core mileage run/trip report to be sure.
Hawaii is hard enough from Washington, DC (11 hours in the air, not counting ground transfers and layovers). It is almost unimaginable from London.
I wrote about our experiences in traveling DCA-PDX-OGG-SEA-DCA on Alaska Airlines 737-800 ETOPS equipment last January here:
http://www.flyertalk.com/forum/delta...-loyalist.html