Frontier Airlines adds 3 new San Diego routes, makes push against bigger rivals

Frontier Airlines will add three new flights to and from San Diego International Airport (SAN) this summer, bolstering its presence in Southern California. Starting June 12, the budget carrier will fly between SAN and Chicago’s O’Hare International Airport (ORD) daily. The next day, Frontier will begin operating four flights each week between SAN and Austin-Bergstrom …