Wait for the transfer to the airport in Antalya early in the morning. Depending on the location of the hotel pick up time is 4:00-5:00 am. The airport departure time is 08:00 am, and the arrival time is 09:15 am. Ataturk airport. You'll drive into Istanbul Old Town and start a tour after meeting a tour guide.
You will first visit the Palace Topkapi, the Ottoman Sultan's home, which displays several Imperial Treasury pieces, the Holy Islamic Relics of Prophet Mohammed, Ottoman Jewellers, traditional clothes and belts, Chinese porcelain, weapons etc. After that, you have free lunchtime for one hour. Istanbul offers a wide variety of fast food stores and elegant restaurants. You will visit Hippodrome Square, Constantinople's Sports and Social Centre, after lunch. The monuments decorating the Hippodrome include the Serpentine Column, Theodosius Obelisk and the German Brunnen Wilhelm II. Blue Mosque (Sultanahmet) in the middle of the Old City is the next place to visit. Constructed in the name of Sultan Ahmet and regarded as the Blue Mosque with the blue colours decorating the walls of its interior, this historic Mosque, distinctive with 6 minarets. It is an active mosque and during the five daily prayers, it is closed to tourists for a half hour.
The Egyptian (Spice) Bazaar will be the next spot you can see. There are some souvenirs, Turkish delights, sweets, etc. you will know your business skills. You can then visit Istanbul from the water on a Bosporus tour boat (optional for an additional fee). You will have dinner at a local restaurant before you go back to the airport (extra cost, hot and cold starts, salad, fish/meatballs or chicken, fruits and candies). Heading to Istanbul Ataturk Airport at 8:00 PM, you will be coming back to Antalya at 9:00 PM. A hotel drop-off concludes your trip.