LHR-PTY Using AMEX Voucher with Stopover in MAD
I don't seem to be able to do this onlne using my new AMEX-PP voucher:
LHR-MAD-PTY PTY-MAD-LHR in J with an overnight stopover in MAD
I can book it direct with a connection in MAD, but not with a (I only want one night) stopover one way. Do I have to phone or are stopovers not allowed?