hello - I have an upcoming itinerary from ewr to Bkk. It begins with a domestic segment from ewr-lax and within 24 hours (next day am) onwards to Bkk via Nrt.

Am currently on a W Fare . Is it possible to upgrade only the ewr-lx segment to a V Fare or higher (in the hope of landing an upgrade) without repricing the entire trip?.

I have a RPU waitlisted. Lax-Nrt is confirmed using a gpu already.

thanks