Spring and fall are the best times to visit La Scala in Milan and the Parthenon in Athens. Nonstop flights on Emirates from New York City to Milan and Athens (the airline's newest nonstop route) are as low as $499 roundtrip, including tax.
Depart on Mondays-Wednesdays through mid-May and in September-November. Sample roundtrip fares are:
Milan ... $499 (nonstop from JFK)
Athens ... $649 (nonstop from Newark)
Book by March 16! Happy Travels!