DL miles can be used for upgrades on SQ? I've never heard of that. I thought they were winding down their relationship. Could you provide more info or a link on how to do that? That would be extremely helpful. Any idea how easy or difficult this is to do? I would imagine the amount of DL miles necessary to do this would be very high if the SQ upgrade amounts themselves are any indication but do you use SQ or DL rules to upgrade?