Feb 8, 2018. Have a sunnier summer with these affordable vacations. Here are the 25 best budget-friendly cities to travel to this summer. from the six largest airport hubs in the U.S. to the 80 largest metro areas during the month of July. Tebaldi says that when you look at temperatures across the country, very few places look like they did 20 years ago. Still, i. San Diego, California -…