Choice plus / full-fare economy clarification
 

I have never had the need to do this before, but if one wanted to book in full fare economy (Y or B), how do you go about it? "Choice plus" fares, at least for the itineraries I was looking at, are still all booking in a discount economy bucket. Thanks for the assistance.

Just under search on the main page is a link to "refine search." That will take you to the full search page. Toward the bottom there will be a drop down menu that is defaulted to lowest fare. Click and change it to refundable. Your results will be displayed and you can find Y under the refundable tab between Choice fares and first.

If you're looking for B specifically, you can always use expertflyer or ITA matrix to find the availability and then call. Matrix will show you the price difference and whether a call is worth it.