We are bringing our own covid tests for return to the US. We are bringing two tests each. You can order them via eMed.com and keep the test sealed in their packaging. When you get ready to leave Spain or anywhere actually-- you use your phone to log onto their website and a live person walks you through the test -- and observes you taking the test, obtains your result and then sends you your results within 15 min to show on your phone at the airport. My hubby just returned to the US from Austria-- it was a breeze. And also, all covid tests are reimbursable my most insurance companies. I submitted the receipt to BCBS on a special form them have just for covid test reimbursement! Sure beats trying to get an appt and finding a place!