I made my third trip to Ooty from Chennai, and on all three accounts, I took different routes to find out which route works best regarding traffic, road conditions and duration. I am someone who likes to get to places in the shortest time so I always try finding out which is the shortest and best route, in this case, it has happened after making my third trip. I thought I would do a write up about the shortest trip from Chennai to Ooty as it would help others too and I know a lot of people travel to Ooty from Chennai. The route Chennai - Vellore - Krishnagiri - Salem - Bhavani - Avinashi - Mettupalayam - Coonoor - Ooty is a common one which is also used by buses and taxi drivers, but the trip can be shortened by around 60km by taking other routes. The shortest route from Chennai to Ooty is: Chennai - Ulundurpet - Kallakurichi - Attur - Bhavani - Sathyamangalam - Mettupalayam - Coonoor -Ooty, which is only, 533km that's around an eight or nine-hour drive. From Chennai to Bhavani you will find a four lane road which is why you can easily breeze through the journey and hardly get any major traffic. The road onwards of Bhavani is a two lane road but traffic is minimum. If you plan to travel on a weekend, I would suggest you take the following route: Chennai - Ulundurpet - Kallakurichi - Attur - Bhavani - Sathyamangalam - Mettupalayam - Kotagiri - Ooty. After Mettupalayam, you should take the route towards Kotagiri instead of Coonoor as on the weekend the road from Mettupalayam to Ooty via Coonoor is full of traffic whereas the road Kotagiri After you reach Mettupalayam. You have 2 option to reach Ooty. First and most used route is via Coonoor. This road is mostly crowded. If you are travelling especially on the weekend then I would suggest to take the route via Kotagiri. This road is little narrower than the Coonoor road but there is much less traffic. So although this route is 7 Km more but most often you will reach Ooty faster.