10 Cheapest Destinations for Flights in June, July, August Boston, MA. This great American city is not just cheap, it’s a treasure trove of history. Denver, CO. Denver, also known as the Mile High City, is an adventure hub. Fort Lauderdale, FL. Seattle, WA. Cancun, MX. Dublin, Ireland. Paris, France. London, England. Feb 24, 2020
Where are the cheapest flight destinations?