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Usually, if you book your tickets several months in advance, you can secure the best possible price for your trip. Planning ahead is especially important in the summer, when tourism in Santorini is at its height. So if you're looking to travel in July or August, try to have your exact travel dates set in January or February. Sites like Expedia and Kayak gather fare information from a wide range of carriers. These sites help you shop for the best fares. If you want to travel with a specific airline, you can search for tickets on their website. Expect to pay somewhere between 30 and 150 euros for each ticket. The carriers that offer direct flights from Athens to Santorini are Aegean Airlines, Olympic Air, Ryanair, and Volotea. If you're traveling on a budget, make sure to check out the fares for Ryanair, as they usually have the cheapest tickets. Save the confirmation email you receive and print out a copy. It's usually a good idea to have a paper copy of your ticket information, in case you need to show it to someone at the airport when you're traveling. You can save a copy of this information on your phone, but make sure you'll be able to access it when you're traveling. If you don't live in Greece or Europe, your phone may not have service while you're in Athens, or it may be expensive to use. Most airlines allow you to check in online before your flight. Your airline will usually send you an email giving you the information about checking in online. If you can't check in online, make sure you have your flight confirmation number so you can retrieve your boarding pass at the airport. When you're traveling abroad, you need to have your passport with you every time you fly. Keep your passport somewhere that you can access it easily, as you will need to show it to airport security before getting on your flight. Public transportation is the most cost-effective option for getting to the airport. If you're taking the metro, take line 3 and get off at the stop for the Athens International Airport. There are also four express buses that go to the airport: X93, X95, X96, and X97. If you have a lot of luggage, you may want to take a taxi. Any licensed taxi driver in the city should be able to bring you to the airport without any trouble. Plan to arrive at the airport at least an hour and a half before your flight. If you didn't check in online, retrieve your boarding pass at the airport. Then check any luggage you can't bring on the plane. The attendants at your airline's service desk should be able to help you with these tasks. Look at your boarding pass to find what gate your plane is leaving from, and head there after you pass through security.
Set the dates you want to fly 3-6 months in advance. Research flights on travel websites. Print out and save copies of your ticket information. Get your boarding pass online or plan to get it at the airport. Pack your passport when going to the airport. Get to the Athens airport by metro, bus, or taxi. Wait for the plane at your gate.