Expedia boss Dara Khosrowshahi is being widely tipped to take the driving seat at car-hailing business Uber.
In an internal memo to staff, the online travel giant said it expects Khosrowshahi to take the role.
He will replace Travis Kalanick who resigned from Uber following investor pressure.
The decision to appoint Khosrowshahi as chief executive was made by Uber’s board late on Sunday, a source told the BBC, but the company has made no official announcement.
Expedia chairman Barry Diller said in the memo to staff: “Nothing has yet been finalised, but having extensively discussed this with Dara, I believe it is his intention to accept.”
Kalanick bowed to pressure from shareholders in the San Francisco-based firm and stood down in June.
His resignation came after months of turmoil at the firm, including a series of controversies about sexual harassment, macho culture and the departure of senior executives.
Khosrowshahi has led Expedia since 2005 and has overseen expansion through the acquisition of Home-Away two years ago. Expedia also owns sites such as Hotels.com. Trivago and Travelocity.
Revenues at Expedia have grown from $2.1 billion in 2005 to $8.7 billion last year.