Tirunelveli, Tamil Nadu to Chengalpattu, Tamil Nadu from $3.9: 6 ways by bus, train, flight or car

• Onboard catering services vary by train operator, with some providing pantry cars and onboard meals. Operators like Indian Railways often offer pre-packed meals that can be ordered via the IRCTC website or app. Confirm if your train has catering services by checking the train details on the operator's website before departure.

• For your journey from Tirunelveli to Chengalpattu, most operators offer varying seat classes, including Sleeper Class, Third AC, Second AC, and First AC. If you prefer more comfort, opt for Second AC or First AC, which provide air conditioning and better privacy compared to the Sleeper Class. Check the availability and prices on the operator's website before booking.

• Major operators for this route include Indian Railways, IRCTC, and private train services like Vaigai Express. You can find train schedules and book tickets through the official Indian Railways website (irctc.co.in) or the IRCTC app. Ensure you check seat availability and book in advance, especially during peak seasons.