arrive HKIA 1.30am what bus number can take to Nina Hotel Causeway Bay

At that time, there is no direct bus available. You need to take Bus Line N11 from the airport to Cannon Street, Gloucester Road and then walk about 300m to change to the Bus Line N72 from Sogo Department Store, Hennessy Road to Ngan Mok Street, King's Road. Taking off the bus, you can see the hotel across the road.