Hi, I have a GUF1 that expires at the end of the year. I am thinking of building a small RTW with the current ex-OSL fares and flying BA/AA e.g. to Hawaii and then maybe BA back again from Asia. Can I use the GUF1 here if I book directly with BA (via hotline)? And are AA prime flight numbers also applicable for the upgrade in this case?
Is there anything to consider or are there any restrictions?