The man had lodged a missing complaint with the police but was subsequently arrested after the woman's parents expressed suspicion about him, they said.
The incident was reported from northwest Delhi's Rani Bagh. Silky Arora's husband Lalit killed her earlier this month, police said.
Lalit was allegedly helped by his brother and his wife, her brother and his father. They took her body and threw it in a valley in Mussoorie, they said.
Lalit was then questioned and subsequently confessed to killing his wife and dumping her body, the police said.
The couple had regular fights and Lalit was upset over it. Five persons, including Lalit and his sister-in-law, were arrested, they said.
The body was today recovered from Mussoorie with the help of ITBP and local police, the police said.