American Airlines has appointed former tennis player Vijay Amritraj as its brand ambassador.

The airline, which has completed one year of operations on the Delhi-Chicago route, said Amritraj will be its face for the non-stop service on the sector, a company statement said.

American airlines has been operating direct flights between Delhi and Chicago since November last year after India and the US signed the open skies agreement, the release said.

"We are very pleased with our performance in the first year of the Delhi-Chicago route. We are pleased to announce the appointment of prominent sports personality Vijay Amritraj as our brand ambassador to promote the Delhi-Chicago route in India and USA," American Airlines regional manager Indian subcontinent Nisha Maharaj said.