traditions including dan sisco. i found out someone in my extended family tested positive for covid. reporter: when he reached out to the airline they wouldn t refund my money and i was stuck with this $900 flight credit we ll likely never use. reporter: if you are rethinking holiday travel cancellation policies vary based on the type of ticket you purchased and your airline. several like delta temporarily removing change fees for more flexibility in the pandemic. still, the nation s top infectious disease expert with this boost of confidence for travelers today. if you re vaccinated and you re boosted and you take care when you go into congregant settings to make sure you continually wear your mask you should be okay. reporter: a layered approach keeping airports buzzing. what should people keep in mind when they arrive at their destination? i think the most important thing to remember is how and when to use testing to your advantage. the idea is that you want to do a