This paper analyses the capacity effects of End-Around Taxiway at Istanbul New Airport which is planned toserve for 150 million passengers per year with the 6 independent runways when it is constructed completely. Thenew airport will be in service with its two independent and two dependent parallel runways after the first phaseof the construction. The airport has also end-around taxiways to increase the runway capacity. End-aroundtaxiways allow the aircraft continue to their taxi movements without the runway crossing. The runway crossingdecreases the runway capacity since the crossing aircraft blocks the runway. The effects of runway crossingproblem on the runway capacity are analysed in this paper. Istanbul New Airport first phase configuration ismodelled with Simmod discrete event simulation tool in two different scenarios which are named baseline andalternative. The baseline scenario represents the new airport without end-around taxiways. The alternativescenario represents the same condition with end-around taxiways. The capacity problems of runway crossing areanalysed and it is enhanced with the end-around taxiway usage. The analysis shows the runway capacities withand without runway crossing.