I'm looking at a redemption flight from the USA to HKG that includes a connection at LHR. From the US to LHR would be on British Air, and then from LHR to HKG on Cathay.

It's not an ideal route, but there is availability. I'm considering booking it as a placeholder, hoping that something direct will open up in the coming months. I understand that if nothing new opens, I'll be stuck on it, but that's fine.

Changes are easy when it's only Cathay. Website, click-click, pay your fee, and done. But I'm not sure what happens when trying to make a change when it includes BA. I'm wondering if there is some hidden hassle because of the partner segment? For example, AI says that because it’s mixed-carrier, it’s agent-handled (add USD 40 per booking) + $50 Change Fee. I don't care about the extra fee, but the thought of spending hours on hold...

I understand there are other issues, and risks

• I know there could be connection issues if Cathay or BA changes the schedule. I know Cathay has no control over BA.
• I believe there are higher fees/taxes when BA is involved, but I'm hopeful something will open up, I'll switch, and they'll eventually be refunded

It's just a straight change from a USA>LHR>HKG (BA>CX) to a USA>HKG (CX only) flight. Looking to make sure I don't step in a cowpie by booking this placeholder.