That's a great combo and I'm doing the same trip in May! If you can push your travel dates a little further, the weather would be ideal for travel. My itinerary involves Istanbul, Capadoccia, Athens, Meteora and Santorini for 13 days and I planned everything thing on my own. If you need detailed itinerary and costs for everything, feel free to ping me.
Hi you can do one week each in Turkey and Greece . Start your trip with Turkey . Cover Istanbul , Cappadocia and Pamukkale in Turkey in a week. For travelling from one city to another either you can take flights or take night buses Then from Istanbul take a direct flight to Athens .2 night Athens , 2 night Mykonos and 3 night Santorini.From travelling from one island to another you can opt for ferries. Its a wonderful experience in itself.
Both Turkey and Greece are those destinations where you can easily find budget accomodation . Sight seeing etc is not expensive
Day 1 Take an early morning flight . Complete your immigration and Hotel check etc. by 3 pm. Rest for a while and start exploring in the evening to the nearby your accommodation. Try the local food eg. Pide, kebap, Lahmancun. I have tried the kebap and pide not in Turkey but in Turkmenistan and they are really delicious and filling. As normally, during trips most of the time is spent outside the rooms, I suggest you not to spend more on the accommodation. If you are on a budget trip, you can have look at the below Airbnb homes. Normally they are https://www.airbnb.co.in/rooms/8114490?location=Istanbul%2C%20Turkey&adults=1&guests=1&check_in=2019-03-26&check_out=2019-03-28&s=yQeYKj9Ihttps://www.airbnb.co.in/rooms/3846260?location=Istanbul%2C%20Turkey&adults=1&guests=1&check_in=2019-03-26&check_out=2019-03-28&s=yQeYKj9I There are many more to explore . You can select based on your choice. Day 2. Start Early in the morning and visit Aya Sofya Museum (Hagia Sophia) opens around 9 am. There are some small parks neary by and then visit the blue mosque, the hippodrome, Obelisk of Theodosius from Egypt, Serpentine Column from the Temple of Delphi, German Fountain, Grand Bazaar and Topkapi Palace. Day 3. Catch a flight to Kayseri and then by Road Transport reach Cappadocia and visit Pasabag Valley, Dervent Valley and Tree Beauties Valley Go to the Turkish airlines (THY) or Pegasus (Flypgs) website to buy flight tickets in advance. The prices are just around 5-10% higher than the buses if booked in advance. Flight time is around Day 4 Visit the south side of Cappadociia , Meskender valley, Rosey Valley, Cavusin village, pigeon valley and if possible the Kaymaykli underground city. Catch the late night flight to Pamukkle, Denizili Day 5 Visit the city of Heirapolis, calcified pools, Traventines waterfalls and necropolis. Also if possible have a swim at the Kleopatra pool and later on visit the museum of Hierapolis. Take a Road transport it takes around 3 hours and stay in Kusadasi. Day 6 ; Explore the areas in Kusadasi, Temple of Artemis , Celsius Library , Ephesos amphitheatre , Harbor street and the house of Virgin Mary. Stay in Kusadasi Day 7 Leave for Mykonos., Greece. Take a ferry to Mykonos from Kusadasi ferry. There will be a connecting ferry not a direct one. Relax on this day as there are chances of getting sea sick after the ferry journey. Day 8 Explore the Mykonos Island, restuarants. Spend time in leisure. The beauty of this island will help you release the travelling stress in Turkey. Day 9 : Travel to Santorini island via Ferry. It takes around 2-2.5 hours by ferry.. Visit the Fira Town. Explore the neart by shops, traditional greek white and blue houses. Day 10. Visit the Caldera, Red Sea Beach, Ancient Thira and Pyrgos Day 11 Take Ferry from Santorini to Athens. It takes around 5 hours by ferry. Just sit back and rest on the ferry. In the evening explore the nearby places Day 12 Visit the Olympian Zeus Temple, Panathenaic Stadium, Temple of Athena Nike and Acropolis museum. Later on collect souvenirs and do some local shopping in the evening. Day 13 Travel back home As you are planning to go in end March, I would suggest you start booking the flight tickets now as the prices are bound to increase and while checking the flight tickets keep your browser in “incognito mode”. Cheers and Enjoy your trip.