Join Date: Oct 2006
Location: London, UK
Programs: BA Gold, VS Silver, SQ Silver, IHG Plat Amb, Hilton Gold, Marriott Plat, Accor Silver, Radisson Prem
Posts: 16,873
You're spot on. Y is fully flex and D is semi flex, hence the price difference. CE can often be cheaper than ET in these cases with flex tickets.