I'm planning a trip to Amsterdam in May (leaving Ottawa May 12, leaving Amsterdam May 18), and some of the flights I've looked at require a plane-change in London, England, which is fine with me. But I just noticed that a couple of bands I like are playing in London on May 20. So what I'd like to do is fly Ottawa > London > Amsterdam on May 12/13, then fly Amsterdam > London on May 18, and London > Ottawa on May 21. Would I be better off to book two separate return tickets (one of them being Ottawa > London / London > Ottawa, the other being London > Amsterdam / Amsterdam London), or should I try to book Ottawa > Amsterdam > London / London > Amsterdam > Ottawa with a couple of days' "split" between arriving in and departing from London on the way back? Any help or advice would be appreciated. Thanks. Aloha, Brad