I am planning to visit my son and his family in Belgium and my daughter in Japan in the April-May timeframe. Advice, please. In terms of airfare costs, am I better separating these into two trips, one in April and the other in May OR purchasing a round the world airfare? I've no experience with round the world airfares. For a 2-point/2-continent itinerary, are they likely to be cost effective? Do any of you know about them, how to purchase, from whom, etc.? Any help will be much appreciated.

Thanks! Carolyn Austin, TX