There is no airport in Lai Chau. The nearest airport is in Dien Bien Phu which is about 135 km away from Lai Chau.
There is no direct bus from Hanoi to Lai Chau. There are buses from Hanoi to Dien Bien Phu and then you can take a bus or taxi to Lai Chau.
There is no waterways to Lai Chau.
There is no public transport in Lai Chau.