LONDON — A British court ruled Wednesday that Julian Assange, the WikiLeaks founder, can be extradited to Sweden for questioning over allegations of sexual abuse made against him by two women there last year. He will seek a final appeal at Britain’s highest court, according to a person close to him.

Two of Britain’s most senior judges dismissed all four arguments raised by Mr. Assange’s defense team. The decision makes it increasingly likely that Mr. Assange will face his accusers in Sweden.

He has at least 14 days to ask for permission to bring his case before Britain’s highest court, the Supreme Court, for a final appeal. The court hears only cases of constitutional or general public importance.