Q. I remember years ago one could buy a "round the world" ticket at a reasonable price. You could stop anywhere as long as it was in one direction, and you had a year to use it. With tickets being bought online these days I dont know how to figure out the least expensive round the world ticket.

We would like to buy one for our daughter who is graduating from college at the end of the semester, though she might not be using it until next spring. Any comments or thoughts on this subject would be greatly appreciated!

A. You can search online through your preferred airline alliance (OneWorld, SkyTeam, Star Alliance...) but rules and restrictions are awfully complicated for RTW ticketing. Generally, the passenger must travel in the same direction, no backtracking allowed. Some plans go by miles, others by segments, stops, continents. You might find it easier to give your choice of airline a call or, better still, drop by the nearest ticketing office to plan it out in person. Another option (and most likely the least expensive) is to book through a company that specializes in planning such trips. AirTreks is an excellent place to begin, and offers more varied itineraries with fewer restrictions.