Travelers wear mask as they walk to a parking lot at O'Hare International Airport in Chicago, Friday, July 2, 2021. Demand for travel has returned to pre-pandemic levels just in time for travel’s hottest season — summer. National parks, Mexico and other resort destinations have surging demand, making them less-than-ideal destinations for budget-conscious travelers. Instead, deal seekers should go to places that have been slow to recover, such as Italy and Greece. (AP Photo/Nam Y. Huh, File)