Flying time between India and the west - Europe and the Americas - will increase by up to 40 minutes with several airlines deciding to avoid overflying the Iranian airspace to steer clear of the US-Iran conflict zone in West Asia. The increase will be about 20 minutes for flights to and from Delhi and almost double for Mumbai.

from Times of India https://timesofindia.indiatimes.com/business/india-business/flights-to-get-longer-as-carriers-avoid-iran-airspace/articleshow/73163822.cms