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NewbieRunner Thanks for the insight. This is helpful. In my previous conversation with Austrian, I had checked the meaning of Economy - X and asked them whether it refers to Economy Classic. They did not provide an answer and asked me to check with Air India. They had the same answer for every question I asked them. However, they mentioned that rules of Air India will apply and Air India does not have any Economy Light (without baggage) for any of its sectors, international as well domestic, as per my knowledge. I am unable to find this in writing anywhere, so I guess it will depend on my luck and the attitude of check-in agent.