Hi folks, quick question.

I'm flying SEA-PHL via MSP on a DL ticket. SEA-MSP both ways is on AS metal and I upgraded to first class on the AS segment as U inventory was available. However, the record on delta.com does not reflect the upgrade after several days. I doubt this will be an issue outbound where I check in with Alaska, but will Delta in PHL check me in to the correct class on the AS flight on the return leg?

Thanks!