Itinerary Check: Is my Turkey-Uzbekistan trip planed out well? Do I have good dates and enough time in each place?

Kas

Flight:

Sun 13 Sept - London to Antalya

09:50 - 15:55

Transfer to Kas

Total time: 5 days

Antalya to Istanbul

Flight: Fri 18 Sept - Antalya to Istanbul

12:35 -14:10

Stasy in Istanbul

Total time: 9 days

Istanbull to Samarkand

Flight: Sat 26 Sept - Istanbul to Samarkand

21:50 - 04:10+1

Stay in Samarkand:

Total time: 6 days

Return Flight

Flight Fri 2 Oct — Samarkand to London 09:00 -15:10

Total duration: 20 daiys

My plan is to start at the beach to relax then go on to city exploration in Istanbul and Samarkand.

Thanks for your help!