Q. My family and I are considering a volunteer experience. I have read about "round-the-world" or RTW fares and “OneWorld” tickets that would allow us to add intermediate stops on the trip without massive costs. Where can I find further information?

A. A company called AirTreks specializes in pricing and selling such fares and as you noted they can be bought from the OneWorld airline alliance, which limits travel on OneWorld partners such as British Airways and American Airlines. RTW fares can indeed save money, especially when bought in business or first class compared to regularly published fares in those classes, although they come with some rather complicated restrictions.

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