Chicago’s Midway Airport is adding another new airline. Avelo Airlines, a new low-cost carrier that began operating in April 2021, will begin flying between Midway and Tweed New Haven Airport in Connecticut, the carrier said Tuesday. Chicago will become the first Midwest city Avelo will serve. The announcement comes months after another low-cost airline, Frontier, announced it would begin service from Midway in April. The expansions at Midway International Airport come as airlines have been battered for two years during the COVID-19 pandemic. The smaller of Chicago’s two airports has long been…