KSL TV SALT LAKE CITY – As winter hits Utah with the snow and the cold, a tropical vacation probably sounds pretty inviting right now. Destinations like Hawaii and Bermuda are allowing travelers to test for COVID-19 before they board their flight, but the test must be taken and processed in a tight, three-day window. So, when you need your results as soon as possible, are mail-in COVID tests a good option that won't derail your vacation with a long wait? The KSL Investigators put some kits to the test. Hawaii, for example Hawaii is back open after effectively shutting down tourism for most of the year. To slow the spread of the coronavirus, the "Aloha State" required travelers to quarantine for two weeks upon their arrival. Now, Hawaii allows travelers to test before boarding so when they arrive – it is straight to the beach. With one important caveat.