Istanbul is on sale yet again from New York City – this time its roughly $100 less than in the last sale. Most dates are in March. You can connect through Geneva or Zurich.
It's a K fare – that means no miles on United Mileage Plus – 50% mileage accrual on Aegean Miles & Bonus and 25% on Miles & More.
It's a great fare to to see Istanbul in March – good chance for spring days and less crowds in Sultanahmet.
Use ITA Matrix flexible date search to find dates that work for you.