A place in Turkey, Kadıköy is an interesting place to visit, given its unique culture, history and character. After your splendid visit to Kadıköy, you can proceed to an important near-by city of Istanbul. Istanbul, is a worth visiting city owing to its prime attractions like Sultan Ahmed Mosque, Topkapi Palace, Hagia Sophia. Also, to reach Kadıköy, you'll have to take a flight to Istanbul; so its not really a detour. And even if it is, the city is worth paying at least a quick visit. 1-2 days is an ideal duration of visit to Kadıköy.
Don't just take a trip, let the trip take you! Have a enjoyable time at Kadıköy.