Indian carrier Vistara is raising frequency between London and Delhi next month.
A Saturday service is being introduced from April 2 to give six flights a week on the route from Heathrow.
The joint venture carrier between Singapore Airlines and India’s Tata Group will fly every day except Thursdays.
Established in 2015, the airline using Boeing 787 Dreamliners on long-haul routes and serves 31 cities in India.
Vistara’s international network also includes Frankfurt and Paris in Europe.
The airline’s 51-strong fleet is to be expanded by 2023 with the addition of 20 aircraft.