The time between Memo­r­i­al Day and Labor Day is one of the most pop­u­lar peri­ods of the year for trav­el. Accord­ing to Expe­dia data, the aver­age trip dura­tion in the sum­mer is two times longer than the rest of the year, mean­ing trav­el­ers are look­ing for their dol­lars to stretch even fur­ther for air­fare and lodg­ing.