I don’t like advertisement for weekend city breaks that starts Monday and finishes Wednesday. This is not a city break for me especially if working. Also a city is best to see in weekends as the locals stay in home, the city kind of sleeps late, there are a lot of events happening. And from my own experience of many times, Istanbul is great in weekends.
Here is a flight for Istanbul with Pegasus, a low-cost company, a good one from my own experience, that operates from Sabiha Gokcen airport, on the Asian side, but with good connections to Taksim by shuttle bus.
Note that we are not an online tourism agent and do not provide services of any commercial type. We just share what we find and give you suggestions about great destinations in the best periods. Just follow the link to book by yourself.