Companion Voucher Booking, flying back to UK from different airport
Hi,
I am flying out to Delhi at Xmas next year and already have flights, but would like to fly back from Bangkok to LHR using the companion voucher when the flights become available (not released yet). I seem to remember seeing that this was possible but that the two airports had to be in the same band. Are Delhi and Bangkok in the same band? Is this possible at all with the Amex companion voucher?
Thanks in advance