I have a question related to the open jaw redemption. I just booked my redemption return flights HKG-LHR a couple of months ago, and now I need to make some changes.
1. Are we allowed to change the route such as outbound HKG- LHR, and inbound JFK-HKG via LHR?
2. I found the tax quoted from BA agent on the phone is different(higher) to what I actually paid online. If my request to change the route JFK-HKG is declined by BA, I will keep the original route. But I like to change to another date for the HKG-LHR segment, I can only do this by calling BA, as I tried to change the date myself online and failed due to a avios+GUF1 booking. Will BA agent recalculate my tax+surcharges based on the previous quoted price?
Many thanks if anyone can give me some advice.