Apologies if this has been covered before but I did a forum search and could not find an answer. I have Y ticked booked in fare bucket W and would like to upgrade to J. I checked and J fare class is available for day of flight. However the upgrade table here https://www.turkishairlines.com/en-i...-smiles/awards states miles required for upgrade on North America to IST route as 45,000, are these for round trip ? (I am guessing, no but the confusing verbiage in T&C under upgrade section (The Mile values shown in the tables also apply for one-way tickets.) isn't doing any favors).

How about if I buy / transfer TK miles to my M & S, can those miles be used for upgrade. (I am guessing yes, but wanted to confirm).

And finally, does YQ apply on upgrades ?