The flight leaves Delhi at 19:00 hrs and reaches Mumbai at around 21:15 hrs. However, our flight on 10 August 2017 was late by 30 minutes and departed at 19:30 PM and it reached Mumbai at 21:30 pm. The aircraft seems to be an old one and our seats being 5A, B and C, it was very noisy. The staff was good and the dinner was good too. Over all, it was a nice experience. I would always recommend Air India for domestic travel for reasons that in Delhi it has access by Metro, second, it goes by Terminal-3, which is one of the best in the world, third, it goes to Mumbai Terminal-2, which is again one of the best in the world. The negative point is that at both the terminals, you have to walk a lot.