Passengers planning their Onam journeys can check the availability for their preferred date and class before booking, as the status may change quicklyPayyanur: Booking has begun for the 112 special train services being operated by the Railways to and from Kerala during the Onam season. Several trains to Chennai and Bengaluru are already on the waiting list, but tickets and berths are still available on a number of services. Here is a route-wise look at the special trains and the availability of tickets:Kerala-Chennai routeThere are 26 special services between Thiruvananthapuram North, Kollam and Chennai. There are also two services from Mysuru to Kannur and two from Kannur to Bengaluru. These trains operate via Palakkad.