Originally Posted by
jdrtravel
No, G fare is Upper Class for VS fare codes . G is used for award & upgrade inventory in Upper Class and it is what needs to be available to use Sky Miles to pay for UC. Unclear if this is what OP meant. However, G is the Delta code for Premium Economy booked on VS or AF on DL ticket stock.
This explains a lot to me. A couple of months ago I booked a flight on delta.com in PE on VS; it was a Delta codeshare with a G fare. Then I upgraded with SkyMiles to Upperclass. The new itinerary changed from the codeshare to the VS flight but still showed a G fare. Now I understand that it was no longer Delta’s G fare, but the VS G fare.