Vistara reportedly plans to commence daily Delhi-Colombo Bandaranaike service in Sep-2019 (Daily News, 11-Apr-2019). The service will be Vistara's first international service and will be operated with 158 seat A320neo aircraft. SriLankan Airlines and Air India also operate the route, according to OAG.
Vistara to commence Delhi-Colombo service in Sep-2019
11 April, 2019