Dan Adams and his partner Kurt traveled to Europe this summer for a two-month holiday. They splurged and flew business class to Barcelona on United Airlines. "We kind of planned this trip for a long time. It was like the trip of a lifetime," said Adams. He tucked AirTags into the couple's four checked bags. "We get to Barcelona. Get off the flight, go into the airport. And I get out my phone. And all four bags are there, so I'm like, 'Yay, they made it,'" said Adams.