Originally Posted by
jsloan
If you use the Electronic Travel Credit for a nonrefundable ticket in the same name as your existing Future Flight Credits, and then cancel after 24 hours (wait ~28 hours or so for safety), you will get a new Future Flight Credit which, in most cases, can be combined with the existing ones.
You cannot combine Basic Economy with non-Basic Economy on the same ticket. You can buy a one-way Basic Economy ticket in one direction, and a one-way Premium Plus ticket in the other direction, but one-way international tickets are often much more than half of the corresponding round-trip fare.
When i do a booking online, it is letting me select the first part as basic economy and the return flight as premium plus. it lets me select seats for both flights and comes up with options like premier access and lounge pass and then the payment page..