Five children and their father have been saved in a dramatic helicopter rescue after they spent nearly four days stranded on a remote road in the Kimberley.

Police launched the rescue mission early on Tuesday after a man walked more than 50 kilometres to get help while the children's father swam across a flooded river in a bid to save the group.

Two helicopter trips took all seven people to Halls Creek, where they were said to be safe and well. Photos: WA Police

A search plane spotted the father and his children, aged between 3 and 11, on Tuesday morning and a helicopter was then dispatched to rescue them.

The group were travelling from Darwin to Halls Creek along an unsealed road on Friday when they became stranded by floodwater about 80 kilometres from the nearest Aboriginal community.