Pay up from RTW fare (M) to Y/B on NZ
Hi,
I am currently booked on a RTW ticket, flying NZ 90 from NRT to AKL.
Upon requesting a star alliance upgrade (out of my Lufthansa M&M account) I found out that only booking classes Y and B (and Eco plus) are upgradeable.
Can I pay the fare difference from M to B and then request an upgrade?
Alternatively, is there any chance that NZ would be willing to do the upgrade with M&M Miles at the gate?
Thanks for any insights you have.
David