Hi all,

First time poster!

I'm looking to getting a RTW ticket from Star Alliance. My question is as follows, any thoughts would be very appreciated.

My options are to book a ticket originating in the US (NYC) or in Europe (WAW).

Option 1:
NYC-xxx-xxx-xxx-xxx-NYC

Options 2:
WAW-xxx-xxx-xxx-xxx-NYC-WAW

There is a significant price difference between the two, so I was wondering if I pick option 2, pay for the tickets, do the whole trip and then just decide not to take the last leg of NYC-WAW, do I get charged anything or just am reported as no show and RTW ticket is completed?

Also any insights into how miles are treated on RTW would be great (for example I am thinking economy vs. business class tickets and business class miles multiplyer effect)

K