From the Waterfront's Website: www.waterfront.co.uk:

How to get there
Just ten minutes walk from the heart of Belfast's centre and convenient to the excellent transport infrastructure that serves the city.

Click here to see a map

By bus:
Nearest bus station: Laganside Bus Centre, 2 minutes walk
Citybus 028 9024 6485
Ulsterbus 028 9033 3000

By train:
Nearest train station; Central Station, East Bridge Street, 5 minutes walk.
Northern Ireland Railways 028 9089 9411

By car:
As in any busy city, you'll find a number of car parks within 5-10 minutes walk. Orange badge holders can use a limited number of temporary and free of charge car parking facilities on site.

By air:
Belfast City Airport 028 9045 7745
5 minutes from the centre of town. A taxi will cost around £7

Belfast International Airport 028 9442 2888
20 miles west of Belfast City Centre. An Airbus runs every half hour to and from the Europa Bus Centre.

By boat:
From Isle of Man - Isle of Man Steam Packet Company
Donegall Quay, 5 minutes walk. Bookings 01624 661661.

From Stranraer
- Seacat Scotland. Donegall Quay, 5 minutes walk. Bookings 0870 5523 523
- Stena Line. Corry Road, 10-15 minutes walk. Bookings 028 9074 7747

From Liverpool - Norse Irish Ferries Victoria Terminal 2, West Bank Road. Booking 028 9077 9090