How to Plan a Family Heritage Trip

In the second season of the TV show “The White Lotus,” three generations of a fictional American family travel to Sicily to try to reconnect with their ancestral roots.Though their journey goes hilariously wrong at times, heritage trips like theirs have become serious business.Decades ago, Americans who were interested in traveling to explore their roots had to rely on family lore, sort through dusty books and, often, follow their gut.

But DNA-testing sites, online genealogical databases and social media have made searching far easier, fueling a growing interest in heritage travel.Global heritage tourism is a nearly $600-billion-a-year industry, which is expected to keep growing by about 4 percent annually through 2030, according to market analysis by Grand View Research.And TV programs like “Who Do You Think You Are?” and “Finding Your Roots,” which follow mostly celebrities as they discover their heritage, are continuing to inspire other journeys.Not everyone goes on a heritage trip for the same reason: Maybe you want to meet living relatives to swap photos and stories.

Maybe you are tracking down official documents to obtain dual citizenship.Or you could simply be looking to connect with a place your family once called home.Here are some tips for planning your own heritage trip.Follow your DNAServices like Ancestry.com, FamilyTreeDNA, MyHeritage and the struggling 23andMe use your genes to decode your family’s likely places of origin.

Other DNA-testing websites cater to specific ethnic groups, like African Ancestry or Somos Ancestria, for Latino origins.The cost of the DNA test kits, which usually require a saliva sample, can vary from about $40 to $300, depending on the company and how detailed you want your results to be.Do some free online sleuthingBirth, death, marriage and census records can help you narrow your search to specific places.

You can dig into these sources through the U.S.Census Bureau or the National Archives and Records Admi...