Hi all - i apologize if this has already been asked. I have a multi-city itinerary coming up, and I’m needing to change the return.

PDX-SEA-LHR, using GUC confirmed to D1

LHR-JFK, premium on Virgin

When I have messaged or called in, they are repricing the entire ticket (significantly more expensive since purchased), ~$1700 more for the same cabin, different flight on VS.

Funny enough, my sister is on a separate reservation with no GUC. When she uses the app to switch, she can change flights and upgrade to Upper Class for $700 on the same flight i’m trying to switch to.

Wondering if this is just the rules of the game, that a round trip is entirely repriced even if just changing the return. I would absolutely use the app, but the confirmed GUC locks me out.