The definition of wealth is “an abundance of valuable possessions or money”, “the state of being rich; material prosperity”, “plentiful supplies of a particular resource”, “a plentiful supply of a particular desirable thing” and “well-being; prosperity”. Some of the definitions obviously refer to money and income, but there are many desirable things that have nothing to do with money. And from some of the definitions of the word, it appears that if you have these desirable things, you have wealth.
If you are going to travel to family and friends, or take a summer vacation, the secret to getting the best deals is to plan ahead. The earlier you book, the better chance you have of getting a good price on the flights you really want rather than the ones that are left over.