The currency in Sidari is the Euro. There are a few ATM machines and foreign exchange facilities in the area, but we suggest that you buy your travel money before you leave the UK. You can buy Greek currency at a great rate either online at ThomasCook.com or from any Thomas Cook branch, find your nearest store here. This is a much cheaper option than buying it at the airport. If you’re not sure how much money you want to take away with you, then why not check out the Thomas Cook Cash Passport?