For your first trip to Istanbul I would recommend at least five days, so you can have the taste of the ancient city and also enjoy the modern side of Istanbul. Although if you want to explore the big cities and the countryside, I´d say you should book a 10 days holiday minimum. In our last trip to Turkey, we spent 60 days around the country and we didn’t have time to enjoy everything.Istanbul is huge, in 2019 there were 15 million people living there. The city is as big as any other European capital, however, Turkey is a cheap destination if you compare it with other countries. With a good travel planning, I’m sure you’ll enjoy your first trip to Istanbul without emptying your pocket. Sounds good, isn’t it?