Originally Posted by
MSPeconomist
What I remember are earlier statements that if you use a GUC to first upgrade to Premium Economy, an additional GUC will be required to upgrade further to the D1 Suites but if you upgrade directly from coach into D1 Suites, only one GUC will be required.
This. It's still listed on Delta GUC site.
Certificates are flexible — they can be used to upgrade
directly from Main Cabin to either Delta Comfort+, First Class, Delta Premium Select or
Delta One. Or they can be used to upgrade from Delta Comfort+ to either First Class, or Delta One. Or they can be used to upgrade from Delta Premium Select to Delta One.
I'm not going to be happy if they backpedal on this one.