Hotels: Nice hotels in the Sultanahmet area show prices around 80€ to 120€ per night per room. Usually hotels have breakfast service, pools and a great staff always ready to help.
Regular restaurants:Meals in regular restaurants in Turkey without alcohol aren’t expensive. Especially if you keep way from the main touristic streets you can have a nice meal (portions – rice/bulgur, salad and meat) for 7 to 10€.
Nice restaurants: A meal in a nice restaurant with starter, main, desert and alcohol (wine or raki) will cost you at least 20€ per person. Alcohol is really expensive in Turkey so it’s what makes this kind of meals so expensive.
Street Food:You can easily find Durums and Doners at 2/3€ in places like Taksim (where all the Turks go). Fresh juices for 1/2€, simits and water for less than 1€. Street food is an amazing way to explore the city and it really brings your costs down.
Visiting the Istanbul attraction will probably be where you will spend most of your money. Each entrance is around 10€ and the city has a lot (a lot!!) of attractions. Think about spending around 25€ per day on it per person at least.
Hagia Sophia, Topkapi Palace: 10€
Basilica Cistern, Galata Tower, Chora Church: 7€
Bosphorus Cruise: 5€
If you rather go on a guided tour with transport and a small group the costs start on 30€ but it includes the entrance fees and you don’t have to wait in lines.
The best way to travel around Istanbul is buying an Istanbul Kart in a kiosk and charge it. Each trip is 70 cents (2.15 liras).
From the airport you can take a Havataş bus to/from Taksim which costs 4€ to Ataturk Airport and 5€ to Sabiha Gocken, per person: if you are 3 or more we highly recommend a private transfer (20€).
Average costs (per person with accommodation):
Low budget:40€ per day
Mid-Range:80€ per day
High-End:+140€ per day