An average trip to Greece for 10 to 14 days can cost anywhere between USD 2,500 to USD 3,500, not including flights. The cost depends on where you stay, and how much you spend on food, activities, and transportation within the country. If you prefer to stay in hostels, you can budget lower. And if your preference is luxury accommodations and transportation, you can easily spend well over $3,500 during a 14-day trip.
Accommodation costs in Greece are in line with most European countries, but they can be cheaper during the spring, fall, and winter. You're likely to find deals on hotels and activities outside of the summer months. In addition, less-known islands are typically cheaper than popular ones like Santorini and Mykonos. And food prices in the major cities tend to be higher.