Aviation Comment: This might be a good time to bring transparency into measuring punctuality of airlines Updated : May 20, 2019 01:53 PM IST On-Time Performance (OTP), or punctuality, is a hotly contested subject in recent years. Passengers have often taken to social media to express their displeasure towards airlines for inflating the block times and reaching early. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.