Fly from Istanbul to Athens only 28€ one-way
Many people that visiting Istanbul, want to visit Athens too. Currently Aegean Airlines has offer for flights until end of March, so you can easily combine the two destinations.
To buy your ticket use Aegean Airlines website (27.74€) or airtickets.com (29.03€) websites. This offer is valid if you buy your ticket before 3rd June 2015. Read more articles about traveling from Istanbul to Athens