That is useful to know. Thank you Schultzois. However, I'm on an F full miles redemption down to EZE because I was only being offered the cost of a full fare WT+ seat to EZE by my employers and I didn't want to risk not being op-upped! They were kind enough to give me the money for the WT+ ticket, which more than covers the taxes on the miles booking however, and sort of compensates using miles for work trips