Originally Posted by
Shareholder
And dealing with carriers in that part of the world is even more difficult than dealing with AC so I'd say there's little hope of making any such change directly with the carrier(s) involved.
I've found Thai Airways, at minimum, to be very flexible, so wouldn't necessarily agree with you.
Last year, I showed up at BKK for the return flight of an Asia 1 award a full day early and asked that they put me on an earlier flight - it was no problem. YMMV, of course, but I think going directly to the airline's office might be the best idea in this case, as Aeroplan will not likely be able to help over the phone (due to a routing change after departure). TG, on the other hand, might just simply make a notation and protect the rest of the booking (something AC probably can't do even if they wanted to).