In general when looking for the cheapest flight to Thessaloniki, try to book your flight during the month of May for the best deal.
From most locations, booking your flights to Thessaloniki around 57 days prior to your departure date finds the best deals.
In general, booking your departure to Thessaloniki for a Monday represents the best deal on airfare. Try to avoid a Wednesday departure to stay away from the highest prices.
Typically, cheap prices to Thessaloniki are most often found for morning flights. Cheap prices are less likely for midday flights.