Petition by a US citizen for a sibling is under 4th preference family category and may take about 1 year or so from filing to approval. However, a more important consideration is not how long it takes for a petition to be approved. Instead, a more relevant inquiry is how long it will take for a visa in that category to become current or available for the sibling to travel to the US.
Answered on Jan 02nd, 2013 at 12:20 PM