Initial service included weekly airmail service with a Puss Moth aircraft between Karachi and Madras via Ahmedabad and Bombay, covering over 1,300 miles. In its very first year of operation, Tata Airlines flew 160,000 miles, carrying 155 passengers and 10.71 ton of mail. In the next few years, Tata Airlines continued to rely for its revenue on the mail contract with the Government of India for carriage of surcharged mail, including a considerable quantity of overseas mail brought to Karachi by Imperial Airways. The same year, Tata Airlines launched its longest domestic flight – Bombay to Trivandrum with a six-seater Miles Merlin In 1938, it was re-christened as Tata Air Services and later same year was renamed as Tata Airlines. By this time Delhi and Colombo were also serviced.