I wasn't sure if I am reading the rules correctly so I thought it best to ask the experts.
Trip is as follows:
JFK-LAX-SYD-ADL-MEL-SYD-SIN-HKG-ICN-HKG-NRT-LHR-CDG-LHR-JFK

I am thinking of cancelling the Paris leg. I am about 3 weeks from departure so if I do that am I charged a fee?

Also, was thinking of adding LHR-MIA-BDL (end trip BDL).

Can I do that?

Thanks,