Hi

I have a question about upgrading part of a trip bought though Expedia - I'd like to upgrade using cash, not points.

I have a ticket LHR-HGK-MEL, SYD-HKG-LHR in PEY. The outbound is in E, the return in R,. I'd like to find out how much it would cost to upgrade the inbound (SYD-LHR) to business, so I phoned CX. They said they couldn't change my booking until after I had taken the first flight, as it was booked through an agency. Fair enough, so I rang Expedia. They said they could only upgrade the whole trip, not just the return leg.

Is there any way I can get a price for the upgrade before ringing CX after taking the first flight?

Many thanks